DEADLY JAPAN QUAKE

July 16, 2007

Killer Earthquake Strikes Japan

EARTHQUAKE on 16/07/2007 at 14:17 (UTC)
SEA OF JAPAN                           125 km NW Honja-ujio

MAGNITUDE: Mw 6.8

Data provided by: BEO  BRA  BUC  GFZ  INGV JMA  LED  LJU  MAD  MON  
                 NEIC NEWS NOR  ODC  ZAMG                          

Latitude    =  36.84 N
Longitude   = 134.82 E
Origin Time =  14:17:32.7 (UTC)
Depth       = 315 Km
RMS         =   0.77 sec
Gap         =  31 degrees
95% confidence ellipse: - Semi major = 3.7 Km
                       - Semi minor = 2.9 Km
                       - Azimuth of major axis = 167 degrees

Number of data used = 414

Preliminary location computed on Mon Jul 16 14:47:53 2007 (UTC)
Done by Gilles Mazet-Roux

All magnitudes estimations :
mb6.9 (BEO)   mb6.9 (BRA)   M 6.3 (GFZ)   mb6.3 (INGV)  
Mw6.6 (JMA)   mb6.6 (LED)   mb6.5 (MAD)   mb6.2 (NEIC)  
mb6.3 (NEWS)  mb6.8 (NOR)   mb6.4 (ODC)   mb6.5 (ZAMG)                                            

P.S.: For additional information, please contact EMSC at:
            - Email: mazet[at]emsc-csem.org
            - Web  : http://www.emsc-csem.org (maps available)
            - Fax  : 33 1 69 26 70 00

DETAILS OF SECOND QUAKE

New quake hits off Japan coast - USGS
16 Jul 2007 15:04:11 GMT
Source: Reuters

WASHINGTON, July 16 (Reuters) - A 6.8 magnitude earthquake struck off the Japanese coast on Monday, the U.S. Geological Survey reported, hours after another quake of similar strength killed at least seven people in Japan and triggered a small leak of radioactive materials from a nuclear plant.

Reuters witnesses in Tokyo reported buildings swayed in the city after the latest quake at 1417 GMT, but there were no immediate reports of damage after the deep quake.

Earthquake Details

Magnitude 6.7
Date-Time
  • Monday, July 16, 2007 at 01:13:28 (UTC)
    = Coordinated Universal Time
  • Monday, July 16, 2007 at 10:13:28 AM
    = local time at epicenter Time of Earthquake in other Time Zones
  • Location 37.574°N, 138.440°E
    Depth 55.4 km (34.4 miles)
    Region NEAR THE WEST COAST OF HONSHU, JAPAN
    Distances 65 km (40 miles) SW of Niigata, Honshu, Japan
    105 km (65 miles) NNE of
    Nagano, Honshu, Japan
    140 km (90 miles) NNW of
    Maebashi, Honshu, Japan
    240 km (150 miles) NNW of
    TOKYO, Japan
     
    Location Uncertainty horizontal +/- 6.1 km (3.8 miles); depth +/- 12.1 km (7.5 miles)
    Parameters Nst=280, Nph=280, Dmin=933 km, Rmss=1.1 sec, Gp= 25°,
    M-type=moment magnitude (Mw), Version=7
    Source
      USGS NEIC (WDCS-D)
       
    Event ID us2007ewac
    • This event has been reviewed by a seismologist.

     

    By KOJI SASAHARA,
    AP
    Posted: 2007-07-16 09:20:29
    Filed Under: Natural Disaster, World
    KASHIWAZAKI, Japan (July 16, 2007) - A strong earthquake struck northwestern Japan on Monday, destroying hundreds of homes, buckling seaside bridges and causing a fire at one of the world's most powerful nuclear power plants. At least seven people were killed and hundreds were injured

    Rescue workers look for survivors after a powerful earthquake hit Kashiwazaki, northern Japan, Monday

    The quake, which left fissures 3 feet wide in the ground along the coast, hit shortly after 10 a.m. local time and was centered off Niigata state. Buildings swayed 160 miles away in Tokyo. Sirens wailed in Kashiwazaki, a city of about 90,000, which appeared to be hardest hit.

    Japan's Meteorological Agency measured the quake at a 6.8 magnitude. The U.S. Geological Survey, which monitors quakes around the world, said it registered 6.7.

    "I was so scared - the violent shaking went on for 20 seconds," Ritei Wakatsuki, who was on her job in a convenience store in Kashiwazaki. "I almost fainted by the fear of shaking."

    Flames and billows of black smoke poured from the Kashiwazaki nuclear plant - the world's largest in terms of power output capacity - which automatically shut down during the quake. The fire, at an electrical transformer, was put out shortly after noon and there was no release of radioactivity or damage to the reactors, said Motoyasu Tamaki, a Tokyo Electric Power Co. official.

    Tsunami warnings were issued along the coast of Niigata but later lifted.

    A series of smaller aftershocks rattled the area, including one with a 5.8 magnitude. The Meteorological Agency warned that the aftershocks could continue for a week.


    The quake hit on Marine Day, a national holiday in Japan, when most people would have been at home.

    Four women and three men - all either in their 70s or 80s - were killed, according to the National Police Agency in Tokyo and NHK, the national broadcaster. NHK reported more than 800 people were hurt, with injuries including broken bones, cuts and bruises.

    Nearly 300 homes in Kashiwazaki - a city known mainly for its fishing industry - were destroyed and some 2,000 people evacuated, officials said.

    A ceiling collapsed in a gym in Kashiwazaki where about 200 people had gathered for a badminton tournament, and one person was hurt, Kyodo reported. The quake also knocked a train car off the rails while it was stopped at a station. No one was injured.

    Several bullet train services linking Tokyo to northern and northwestern Japan were suspended.

    Prime Minister Shinzo Abe - whose ruling party is trailing in the polls - interrupted a campaign stop in southern Japan for upcoming parliamentary elections, rushed back to Tokyo and announced he would head to the damaged area. He later arrived in a blue uniform to survey the damage.

    "Many people told me they want to return to their normal lives as quickly as possible," Abe told reporters in Kashiwazaki. "The government will make every effort to help with recovery."

    Japan sits atop four tectonic plates and is one of the world's most earthquake-prone countries. The last major quake to hit the capital, Tokyo, killed some 142,000 people in 1923, and experts say the capital has a 90 percent chance of suffering a major quake in the next 50 years.

    In October 2004, a magnitude-6.8 earthquake hit Niigata, killing 40 people and damaging more than 6,000 homes. It was the deadliest to hit Japan since 1995, when a magnitude-7.2 quake killed 6,433 people in the western city of Kobe.

    Associated Press writers Kozo Mizoguchi and Chisaki Watanabe in Tokyo contributed to this report.
     
    Copyright 2007 The Associated Press.
    2007-07-15 22:15:58

    Strong earthquake jolts northwestern Japan

    7 killed, hundreds of homes destroyed; nuke plant leaks radioactive water

    MSNBC News Services
    Updated: 1 hour, 25 minutes ago

    KASHIWAZAKI, Japan - The impact of a strong quake Monday in northwestern Japan caused the Kashiwazaki-Kariwa nuclear power plant -- the world's largest – to leak water containing radioactive materials, a company spokesman said.

    National broadcaster NHK reported that the water leaked from the plant into the Sea of Japan, but that the radioactivity level was below safely levels and posed no danger to the environment.

    At least seven people were killed by the quake, which destroyed hundreds of homes, buckled seaside bridges and caused a fire at the nuclear power plant.

    The quake, which left fissures 3 feet wide in the ground along the coast, hit shortly after 10 a.m. local time and was centered off Niigata state. Buildings swayed 160 miles away in Tokyo. Sirens wailed in Kashiwazaki, a city of about 90,000, which appeared to be hardest hit.

    Japan’s Meteorological Agency measured the quake at a 6.8 magnitude. The U.S. Geological Survey, which monitors quakes around the world, said it registered 6.7.

    “I was so scared — the violent shaking went on for 20 seconds,” Ritei Wakatsuki, who was on her job in a convenience store in Kashiwazaki. “I almost fainted by the fear of shaking.”

    Flames and billows of black smoke poured from the Kashiwazaki plant, which automatically shut down during the quake.

    Tsunami warnings
    Tsunami warnings were issued along the coast of Niigata but later lifted.

    A series of smaller aftershocks rattled the area, including one with a 5.8 magnitude. The Meteorological Agency warned that the aftershocks could continue for a week.

    The quake hit on Marine Day, a national holiday in Japan, when most people would have been at home.

    Kiyoshi Ota / Reuters
    Monday's earthquake derailed a train at Kashiwazaki station before its departure.

    Four women and three men — all either in their 70s or 80s — were killed, according to the National Police Agency in Tokyo and NHK, the national broadcaster. NHK reported more than 800 people were hurt, with injuries including broken bones, cuts and bruises.

    Nearly 300 homes in Kashiwazaki — a city known mainly for its fishing industry — were destroyed and some 2,000 people evacuated, officials said.

    A ceiling collapsed in a gym in Kashiwazaki where about 200 people had gathered for a badminton tournament, and one person was hurt, Kyodo reported. The quake also knocked a train car off the rails while it was stopped at a station. No one was injured.

     
    Several bullet train services linking Tokyo to northern and northwestern Japan were suspended.

    Prime Minister Shinzo Abe — whose ruling party is trailing in the polls — interrupted a campaign stop in southern Japan for upcoming parliamentary elections, rushed back to Tokyo and announced he would head to the damaged area. He later arrived in a blue uniform to survey the damage.

    “Many people told me they want to return to their normal lives as quickly as possible,” Abe told reporters in Kashiwazaki. “The government will make every effort to help with recovery.”

    Four tectonic plates

    Japan sits atop four tectonic plates and is one of the world’s most earthquake-prone countries. The last major quake to hit the capital, Tokyo, killed some 142,000 people in 1923, and experts say the capital has a 90 percent chance of suffering a major quake in the next 50 years.

    In October 2004, a magnitude-6.8 earthquake hit Niigata, killing 40 people and damaging more than 6,000 homes. It was the deadliest to hit Japan since 1995, when a magnitude-7.2 quake killed 6,433 people in the western city of Kobe.


    Associated Press - July 15, 2007 10:43 PM ET

    TOKYO (AP) - A strong earthquake has hit Japan.

    The magnitude 6.6 quake caused buildings in Tokyo to sway. At least 20 people were injured. Officials say tsunamis as high as 20 inches have hit coasts in the area.

    Japanese broadcaster NHK says black smoke was seen pouring from a nuclear plant, which was automatically shut down. NHK reports the smoke was caused by a fire in an electrical transformer, and that no radioactivity had been released.

    Authorities believe the earthquake was centered off the northwest coast of Japan.

    There are reports that several bullet train services connecting Tokyo to northern Japan have been suspended.

    Copyright 2007 The Associated Press.
     

    Strong Quake Rocks Japan, Nuclear Plant
    Jul 16 11:51 AM US/Eastern
    By KOJI SASAHARA
    Associated Press Writer KASHIWAZAKI, Japan (AP) - A strong earthquake struck northwestern Japan on Monday, causing a fire and radioactive water leak at one of the world's most powerful nuclear plants and turning buildings into piles of lumber. At least seven people were killed and hundreds injured.

    Flames and billows of black smoke poured from the Kashiwazaki nuclear plant—the world's largest in terms of power output capacity. It took two hours to extinguish the fire, at an electrical transformer, said Motoyasu Tamaki, a Tokyo Electric Power Co. official.

    The plant leaked about a half-gallon of water, said Katsuya Uchino, another Tokyo Electric official. Uchino said the water contained a tiny amount of radioactive material—a billionth of the guideline under Japanese law—and is believed to have flushed into the Sea of Japan.

    The quake, which left fissures 3 feet wide in the ground along the coast, hit shortly after 10 a.m. local time and was centered off Niigata state. Buildings swayed 160 miles away in Tokyo. Sirens wailed in Kashiwazaki, a city of about 90,000, which appeared to be hardest hit.

    Japan's Meteorological Agency measured the quake at a 6.8 magnitude. Near midnight Monday, another 6.8-magnitude quake hit off Japan's west coast, according to the U.S. Geological Survey, which said the initial quake registered 6.7.

    "I was so scared—the violent shaking went on for 20 seconds," Ritei Wakatsuki, who was on her job in a convenience store in Kashiwazaki. "I almost fainted by the fear of shaking."

    Tokyo Electric said the water leak had stopped and that there had been no "significant change" in the seawater under surveillance and no effect on the environment, but the developments at Kashiwazaki triggered fresh concern about the earthquake resistance of Japan's nuclear power plants, which supply nearly a third of the country's electricity.

    Aileen Mioko Smith, of the environmentalist group Green Action, said the fire showed that some facilities at nuclear power plants such as electrical transformers were built to lower quake-resistance levels than other equipment such as reactor cores.

    "That's the Achilles heel of nuclear power plants," said Mioko Smith, who said it took the plant two hours to extinguish the fire. "Today's a good example of that... How prepared are they to put out fires when they happen?

    The quake hit on Marine Day, a national holiday in Japan, when most people would have been at home.

    Four women and three men—all either in their 70s or 80s—were killed, according to the National Police Agency in Tokyo and NHK, which reported more than 800 people were hurt.

    Nearly 300 homes in Kashiwazaki—a city known mainly for its fishing industry—were destroyed and some 2,000 people evacuated, officials said.

    A ceiling collapsed in a gym in Kashiwazaki where about 200 people had gathered for a badminton tournament, and one person was hurt, Kyodo reported. The quake also knocked a train car off the rails while it was stopped at a station. No one was injured.

    Several bullet train services linking Tokyo to northern and northwestern Japan were suspended.

    Prime Minister Shinzo Abe—whose ruling party is trailing in the polls—interrupted a campaign stop in southern Japan for upcoming parliamentary elections, rushed back to Tokyo and announced he would head to the damaged area. He later arrived in a blue uniform to survey the damage.

    "Many people told me they want to return to their normal lives as quickly as possible," Abe told reporters in Kashiwazaki. "The government will make every effort to help with recovery."

    Japan sits atop four tectonic plates and is one of the world's most earthquake-prone countries. The last major quake to hit the capital, Tokyo, killed some 142,000 people in 1923, and experts say the capital has a 90 percent chance of suffering a major quake in the next 50 years.

    In October 2004, a magnitude-6.8 earthquake hit Niigata, killing 40 people and damaging more than 6,000 homes. It was the deadliest to hit Japan since 1995, when a magnitude-7.2 quake killed 6,433 people in the western city of Kobe.

    ___

    Associated Press writers Kozo Mizoguchi and Chisaki Watanabe in Tokyo contributed to this report.

     

    Second quake hits Japan; seven dead, injures hundreds

    Reuters

    Published: Monday, July 16, 2007

    KASHIWAZAKI, Japan -- A second 6.8 magnitude earthquake struck off the Japanese coast on Monday, the U.S. Geological Survey reported, hours after a strong earthquake flattened houses in northwestern Japan on, killing at least seven people, and sparking a small radiation leak and fire at the world's biggest nuclear power plant.

    More than 800 people were injured by the earlier quake in Niigata prefecture, and buildings swayed as far away as Tokyo. Thousands were evacuated from their homes.

    Tokyo Electric Power Co (TEPCO) said 1.5 litres of water containing radioactive materials had leaked from the No. 6 unit at its Kashiwazaki-Kariwa nuclear power plant -- the world's largest.

    A 6.8 magnitude earthquake struck off the Japanese coast on Monday, the U.S. Geological Survey reported, hours after another quake of similar strength killed at least seven people in Japan and triggered a small leak of radioactive materials from a nuclear plant.

    The company said in a statement that the contaminated water had been released into the ocean and had had no effect on the environment. TEPCO said earlier there were no radiation leaks at the plant, where reactors automatically shut down for checks.

    Two women in their 80s died when their houses collapsed during the magnitude 6.8 tremor. A police spokesman confirmed the deaths of seven elderly people, and a 77-year-old man was reported missing after going for a walk before the quake hit at 10:13 a.m. local time.

    "First there was a sharp vertical jolt and then it shook sideways for a long time and I couldn't stand up. Tall shelves fell over and things flew around," said Harumi Mikami, 55, a teacher who was at her school in Kashiwazaki City, near the focus of the quake in Niigata prefecture about 250 km northwest of Tokyo.

    The quake halted gas service to about 35,000 homes and disrupted the water supply to all of Kashiwazaki, a city with a population of around 95,000 that was hardest hit by the quake, media and officials said.

    About 25,000 homes in Niigata prefecture were without electricity, a local official said.

    Houses, many wooden with traditional heavy tile roofs, were flattened, a temple roof caved in and roads cracked in the quake, which was centred in the same northwestern area as a tremor three years ago that killed some 65 people.

    "My house is half destroyed and the pillars are damaged," Ms. Mikami said. "My biggest worry is where I will live now."

    TV pictures showed an 84-year-old woman, apparently alive, being rescued from the wreckage of her collapsed house some five hours after the quake.

    About 7,800 people had fled their homes to nearly 100 evacuation centres as scores of aftershocks of up to magnitude 5.6 rattled the area, state broadcaster NHK said.

    Troops and extra emergency teams were being sent to help with rescue and relief efforts, while Prime Minister Shinzo Abe cut short campaigning for parliamentary elections to inspect the area.

    A fire in an electrical transformer at the Kashiwazaki Kariwa nuclear power plant -- the world's largest -- was quickly extinguished but it was unclear when TEPCO could restart three power units there, said Yoshinobu Kamijima, a company spokesman.

    Abe's government set up an emergency office to deal with the quake, which officials said had damaged about 500 buildings.

    "People tell me they want to get back to their usual lives as soon as possible," Abe said after arriving by helicopter in Kashiwazaki. "We'll make every effort towards rescue and also to restore services such as gas and electricity."

    Japan is one of the world's most earthquake-prone countries, with a tremor occurring at least every five minutes.

    The first quake was centred around 60 km southwest of Niigata. Monday was a holiday in Japan and financial markets were closed.

    Bullet trains stopped services in northern Japan after the quake but resumed about 11 hours after the quake. A local train toppled from the rails, but media said no one was injured.

    Landslides closed several local roads, and rain was forecast in the area for the next two days, raising worries about more slippage.

    Soldiers brought tanks of water to Kashiwazaki and were cooking rice for evacuees. "My house was totally messed up and the only thing I could think of was to escape and to take my kids to safety," said Itsuko Igarashi, a housewife, at an evacuation centre in an elementary school gymnasium in Kashiwazaki.

    "It was shaking and scary," said her daughter, Sae, aged 6.

    Tsunami warning sirens sounded along affected stretches of the Sea of Japan, but the alert was later withdrawn.

    Niigata was hit in October 2004 by a quake with a matching magnitude of 6.8 that killed 65 people and injured more than 3,000.

    That was the deadliest quake in Japan since a magnitude 7.3 tremor hit Kobe city in 1995, killing more than 6,400.

    Sanyo Electric Co. spokesman Akihiko Oiwa said operations had been halted at a semiconductor factory in Niigata, one of the company's largest, but there had been no reports of damage.
     

    N-plant's earthquake fail-safes worked / Small amount of coolant leaked from power station, but reactors shut down

    7-17-07

    The reactors of Tokyo Electric Power Co.'s Kashiwazaki-Kariwa nuclear power station automatically shut down immediately after Monday's powerful earthquake struck the area.

    The Nos. 2, 3, 4 and 7 reactors shut down as designed. The other three reactors were undergoing periodic inspections at the time.

    Soon after the magnitude-6.8 quake struck, a fire broke out in a transformer at the No. 3 reactor facility, sending black smoke billowing into the air.

    The Economy, Trade and Industry Ministry said no abnormal readings had been detected from monitoring posts for radiation near the transformer. But on Monday evening, TEPCO said it had confirmed that a small amount of coolant containing radioactive material had leaked at the No. 6 reactor.

    Shunsuke Kondo, professor emeritus at Tokyo University, said: "It seemed the fire started in the transformer, which provides electricity from outside. I think insulation oil used for the transformer caught fire."

    According to Kondo, the black smoke indicated insulation oil had ignited. Pipe joints that provide insulation oil to transformers are relatively weak, and Kondo said insulation oil probably leaked from a joint and caught fire.

    The quake was similar in size to the main tremor of the Niigata Prefecture Chuetsu Earthquake that struck on Oct. 23, 2004. But that quake's epicenter was closer to bedrock and was not intense enough to trigger an automatic shutdown of the reactors.

    The transmission of seismic energy of an earthquake is very complicated and is greatly influenced by the depth and location of an earthquake's focus. The reactors' automatic shutdown is believed to have functioned as designed and not because of any imminent danger.

    Only important facilities at the power plant have strong quake resistance. Power plant facilities and machines are divided into four levels of importance. The lowest-level facilities, including electric generators, are required to have almost the same level of quake resistance as ordinary buildings. The transformer that caught fire probably was categorized as of low importance.

    "Quake-resistance standards for nuclear power plants are set to be strengthened to handle a catastrophic quake of a magnitude of 6.9, up from a magnitude 6.5 under the old standards," Waseda University Prof. Masanori Hamada said. "Nuclear power plants are designed with safety allowances under these standards, meaning that even if a quake over the standard occurs, there's only a slight chance of an accident occurring."

    Monday's quake magnitude came close to the new standard. "So far, we can't say reviewing the new standard will be necessary, but depending on the result of analysis from an actual quake, the standard might need to be reviewed," Hamada said.

    ===

    Focus close to seabed

    The earthquake was caused by the shifting of a fault at a shallow part of the plate below the Japanese archipelago, according to the Meteorological Agency. The seismic focus was about 17 kilometers below the seabed of the Sea of Japan off Kashiwazaki, Niigata Prefecture.

    While the quake was the same magnitude--6.8--as the 2004 Niigata Prefecture Chuetsu Earthquake, in which 67 people died, a different fault apparently shifted in this quake because the focus was about 40 kilometers northwest of that of the 2004 earthquake. As the fault is located in a sea area, its existence had not been known.

    In Monday's earthquake, tremors measuring upper 6 on the Japanese intensity scale of 7 were recorded in Iizunamachi, Nagano Prefecture, despite its distance from Kashiwazaki.

    An earthquake occurring near the surface of the Earth, including this earthquake, is referred to as a "near-field" or "inland" quake. The 1995 Great Hanshin Earthquake in Hyogo Prefecture and the Noto Peninsula Earthquake fall within this category. As this type of temblor can occur anywhere in the country, experts say areas that were not hit by the latest quake should take heed of the danger such quakes pose.

    Under the plate on which the Japanese archipelago sits, the Pacific Plate and the Philippine Sea Plate are gradually sinking, pushing the land-side plate northwest. "Due to the strain energy within the land-side plate generated in the process, weak ground breaks, triggering a quake," an agency spokesman said.

    (Jul. 17, 2007)

    Quake/Nuclear Reactor

    World's Biggest Nuke Plant Closed After Japan Quake

    Japan Hit By Second Quake - Atomic Reactor Damaged

    Japan Nuke Plant Leaked Into Sea After Quake


    Major quake in Japan leaves 12,000 in shelters, aftershocks warned
    www.chinaview.cn 2007-07-17 23:11:47
     
        KASHIWAZAKI, Japan, July 17, 2007  (Xinhua) -- A major earthquake that rocked Niigata prefecture and surrounding areas in Japan on Monday has left over 12,000 people in shelters by Tuesday, with nine killed and over 1,000 injured.

        The death toll of the 6.8-magnitude quake rose to nine on Tuesday morning while the number of the injured exceeded 1,000, local authorities said. A man is still missing in Niigata.

        All the nine victims, in their 70s or 80s, were from the most heavily hit city of Kashiwazaki in Niigata. Most of the injured people also lived in Niigata.

        In Kashiwazaki, the quake has widely disrupted supply of drinking water, electricity and gas, local relief officials told Xinhua. They said that some 20,000 to 40,000 homes are still facing problems of either water, or electricity, or gas supplies.

        It is likely to take quite a long time to restore those basic services as large-scale work is needed, a local official said. About 70 schools, including those in Kashiwazaki, were closed Tuesday due to the quake and some sections of highways remained closed.

        There is a 50 percent probability of an aftershock with a magnitude of 5 or higher in the next three days and a 30 percent chance of a 5.5-magnitude aftershock, the Japan Meteorological Agency warned Tuesday.

        The major quake occurred at 10:13 a.m. (0113 GMT) Monday, with its epicenter some 60 kilometers southwest of the city of Niigata, around 17 km below seabed in waters off Niigata prefecture. Within24 hours after the main quake, there have been 10 tremors measuring over 4 on the Richter scale, the agency said.

        At the Kashiwazaki Kariwa nuclear power plant in Niigata, a total of 50 cases of water leakage, fire and other problems have been confirmed by Tuesday evening.

        The incidents included a fire, leakage of water containing radioactive material, detection of a small quantity of radiation from a ventilation filter and toppling of drums containing low-level radioactive waste, the operator Tokyo Electric Power Co. said.

        There has been no report that any harm has been done to humans or the environment due to those incidents. The Japanese Industry Ministry ordered Tokyo Electric Power Co. to keep the nuke plant closed until its safety is confirmed.

        Since the epicenter of the quake was below the seabed, experts said operations at the plant will be suspended for some time as the operator will need to assess how the fault line affects the facility's quake-resistance.

        At least 340 houses collapsed at the quake and several hundreds were damaged in Niigata and Nagano prefectures. Rescue workers with search dogs are still searching for survivors.

        In October 2004, a major earthquake hit Niigata prefecture, killing 67 people and injuring over 4,800.
     

    In pictures: Japan earthquake


    The city of Kashiwazaki was hardest hit by a 6.8-magnitude earthquake that struck central Japan on Monday.


    Rescuers are still searching for survivors in collapsed houses across the city.

    The public transport system in Kashiwazaki has also been severely disrupted

    Tokyo Electric Power reports 50 quake-caused problems at nuclear plant

    TOKYO — A total of 50 cases of water leakage, fire and other problems have occurred at a nuclear power plant in Niigata Prefecture due to the powerful earthquake that hit the prefecture Monday, Tokyo Electric Power Co. said Tuesday.

     

     

     

     

    Jul 18, 2:07 AM EDT

    Company Says Radioactive Leak Was Bigger


    Multimedia
    Quake Damages Nuclear Reactor in Japan
    Latest News
    Company Says Radioactive Leak Was Bigger

    Problems at Japan's Quake-Hit Reactor

    Japan Nuclear Accidents Glance

    Typhoon Misses Tokyo, Loses Strength

    KASHIWAZAKI, Japan (AP) -- A top power company official defended safety standards at an earthquake-ravaged nuclear plant Wednesday, even as the company said a radioactive leak was bigger than first reported and the mayor ordered the plant be shut down until its safety could be confirmed.

    Plant operator Tokyo Electric Power Co. announced that a leak of radioactive water into the Sea of Japan was actually 50 percent bigger than initially announced Monday night. But the levels were still well below danger levels, it said.

    "We made a mistake in calculating the amount that leaked into the ocean. We apologize and make correction," the statement said. Spokesman Jun Oshima said the amount was still "one-billionth of Japan's legal limit."

    Hiroshi Aida, mayor of Kashiwazaki, a city near the epicenter that is home to the plant and 93,500 people, ordered operations at the plant halted Wednesday for "safety reasons."

    "I am worried," he said. "It would be difficult to restart operations at this time. ... The safety of the plant must be assured before it is reopened."

    The International Atomic Energy Agency, meanwhile, pressed Japan to undertake a transparent and thorough investigation of the accidents to see if there are lessons that can be applied to nuclear plants elsewhere in the world.

    Adding to the urgency was new data from aftershocks of Monday's deadly 6.8-magnitude quake suggesting a fault line may run underneath the mammoth power plant.

    Kashiwazaki-Kariwa is the world's largest nuclear plant in power output capacity. Signs of problems after Monday's quake came first not from the officials, but in a plume of smoke that rose up when the quake triggered a small fire at an electrical transformer.

    It was announced only 12 hours later that the quake also caused a leak of about 315 gallons of water containing radioactive material. Officials said the water leak was well within safety standards. The water was flushed into the sea.

    Later Tuesday, it said 50 cases of "malfunctioning and trouble" had been found. Four of the plant's seven reactors were running at the time of the quake, and they were all shut down automatically by a safety mechanism.

    Tsunehisa Katsumata, president of plant operator Tokyo Electric Power Co., toured the site Wednesday morning, declaring it "a mess" and apologizing for "all the worry and trouble we have caused."

    "It is hard to make everything go perfectly," he said. "We will conduct an investigation from the ground up. But I think fundamentally we have confirmed that our safety measures worked."

    Speaking in Malaysia, IAEA chief Mohamed ElBaradei said a thorough review was key and offered to have his Vienna-based agency pull together global experts.

    "It doesn't mean that the reactor structure or system has been damaged," ElBaradei said. "I would hope and I trust that Japan would be fully transparent in its investigation of that accident. The agency would be ready to join Japan through an international team in reviewing that accident and drawing the necessary lessons."

    Meanwhile, TEPCO spokesman Hiroshi Itagaki said that information accumulated by studying aftershocks shows that a fault line stretches under the ocean near the coast, which is not far away from the plant. He declined to say how close to the plant the fault might come, but the company is planning to further study the issue.

    Osamu Kamigaichi, an official at Japan's Meteorological Agency, which monitors earthquakes, said it was possible the fault line stretched in the direction of the nuclear facility and may reach underneath its grounds.

    Across town, more than 8,000 residents hunkered down for their second night in shelters. The death toll - nine, with one person missing - was not expected to rise significantly. Most of the newer parts of town escaped major damage.

    For residents, thousands of whom work at the plant, the controversy over its safety compounded already severe problems, which included heavy rains and the threat of landslides, water and power outages, and spotty communications.

    "Whenever there is an earthquake, the first thing we worry about is the nuclear plant. I worry about whether there will be a fire or something," said Kiyokazu Tsunajima, a tailor who sat outside on his porch with his family, afraid an aftershock might collapse his damaged house.

    "It's frightening, but I guess we are used to it," said Ikuko Sato, a young mother who was spending the night in a crowded evacuation center near her home, which was without water or power.

    "It's almost the summer swimming season," she said. "I wonder if it'll be safe to go in the water."

    The area around Kashiwazaki was hit by an earthquake three years ago that killed 67 people, but the plant suffered no damage.

    The malfunctions and a delay in reporting them fueled concerns about the safety of Japan's 55 nuclear reactors, which have suffered a string of accidents and cover-ups. Nuclear power plants around Japan were ordered to conduct inspections.

    The plant in Kashiwazaki-Kariwa, 135 miles northwest of Tokyo, eclipsed a nuclear power station in Ontario as the world's largest power station when it added its seventh reactor in 1997.

    The Japanese plant, which generates 8.2 million kilowatts of electricity, has been plagued with mishaps. In 2001, a radioactive leak was found in the turbine room of one reactor.

    The plant's safety record and its proximity to a fault line prompted residents to file lawsuits claiming the government had failed to conduct sufficient safety reviews when it approved construction of the plant in the 1970s. But in 2005, a Tokyo court threw out a lawsuit filed by 33 residents, saying there was no error in the government safety reviews.

    Environmentalists have criticized Japan's reliance on nuclear energy as irresponsible in a nation with such a vulnerability to powerful quakes.

    "This fire and leakage underscores the threat of nuclear accidents in Japan, especially in earthquake zones," said Jan Beranek, a Greenpeace official in Amsterdam. "In principle, it's a bad idea to build nuclear plants in earthquake-prone areas."

    Japan has a history of nuclear accidents, some of them deadly.

    In 2004, five workers at the Mihama nuclear plant in western Japan were killed and six were injured after a corroded pipe ruptured and sprayed plant workers with boiling water and steam. The accident was the nation's worst at a nuclear facility.

    The U.S. Nuclear Regulatory Commission requires that nuclear plants be built with the capacity to withstand the strongest earthquake to hit its site within 100 years. In a "safe shutdown earthquake," the chain reaction in the reactor stops, but the cooling system keeps running so excess heat is carried away from the core.

    William Miller, a professor of nuclear engineering at the University of Missouri, said the Kashiwazaki-Kariwa plant "did what it was supposed to. It shut down."

    Although its operator said there were leaks, Miller called the amounts he had heard were "so small as to be negligible."

    However, David Lochbaum, director of the Nuclear Safety Project at the Union of Concerned Scientists, noted that fire and loss of power, both of which occurred at Kashiwazaki-Kariwa, are the two most likely causes of meltdowns at nuclear facilities.

    ---

    Associated Press writers Hiroko Tabuchi and Kozo Mizoguchi in Tokyo and Sarah DiLorenzo in New York contributed to this report.

    © 2007 The Associated Press. All rights reserved.


    Quake leaves over 12,000 in shelters

    KASHIWAZAKI — More than 12,000 people were forced to stay at evacuation shelters in Niigata Prefecture on Tuesday as power and water supplies remain cut in most areas following a magnitude 6.8 earthquake the previous day


    The death toll rose to nine after 71-year-old Masako Iino, who was pulled from the rubble of a collapsed kimono shop in

    Kashiwazaki early Tuesday, was later pronounced dead, while the number of injured has topped 1,000.

    One man is still missing in Niigata Prefecture.

    The Japan Meteorological Agency warned that there is a 50 percent probability of an aftershock with a magnitude of 5 or higher occurring in the next three days and a 30 percent chance of a magnitude 5.5 aftershock.

    In Kashiwazaki, the quake resulted in electricity failures still affecting about 24,500 homes, while more than 39,000 homes face water disruptions. Gas supplies remain cut at about 35,000 homes in Kashiwazaki and Kariwa.


    (KYODO)
    Death toll in Japan earthquake rises to 10
     
    www.chinaview.cn 2007-07-18 21:59:44
     
     
     
        KASHIWAZAKI, Japan, July 18, 2007 (Xinhua) --

    The death toll in a major earthquake in central Japan's Niigata prefecture rose to ten late Wednesday, with the finding of a man's body in the rubble.

        According to local police, the body was found under the rubble of a collapsed temple in Kashiwazaki, the most heavily-hit city in Monday's quake, where other nine victims were found dead.

        Besides, an old man is still missing in Kashiwazaki. The magnitude 6.8 quake has left over 1,000 people injured in Niigata, Nagano and Toyama prefectures.

        According to Chinese embassy in Japan, no Chinese people have been found injured during the quake. Some 450 Chinese live in the city of Kashiwazaki by the end of 2006. To assist Chinese residents, the city started airing information in Chinese through radio on Wednesday, which included instructions on drinking water and trash disposal.

        Some 10,000 people still stay in shelters in disaster areas. Basic utility services such as drinking water, electricity and gas have not been fully restored.

     

     

     

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