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Archive for the ‘Tokyo’ Category

Magnitude 6.3 Quake Strikes Hokkaido Japan

Posted by feww on June 5, 2009

Strong earthquake strikes Hokkaido, Japan

The earthquake measuring 6.3 MW in line with FEWW forecast

Hokkaido us2009hmai

Earthquake Location. 10-degree Map Centered at 40°N,145°E – USGS

Earthquake details:

  • Magnitude 6.3
  • Date-Time: Friday, June 05, 2009 at 03:30:34 UTC [Friday, June 05, 2009 at 12:30:34 PM at epicenter]
  • Location:  41.858°N, 143.399°E
  • Depth 41.6 km (25.9 miles)
  • Region:  HOKKAIDO ISLAND, JAPAN
  • Distances
    • 150 km (90 miles) SW of Kushiro, Hokkaido, Japan
    • 215 km (135 miles) SE of Sapporo, Hokkaido, Japan
    • 220 km (135 miles) NE of Hachinohe, Honshu, Japan
    • 755 km (470 miles) NNE of TOKYO, Japan
  • Location Uncertainty: horizontal +/- 5.3 km (3.3 miles); depth +/- 7.1 km (4.4 miles)
  • Parameters: NST=185, Nph=185, Dmin=26.6 km, Rmss=0.81 sec, Gp= 36°, M-type=teleseismic moment magnitude (Mw), Version=7
  • Source: USGS NEIC (WDCS-D)
  • Event ID: us2009hmai

Hokkaido us2009hmai pop shake

Overall, the population in this region resides in structures that are a mix of vulnerable and earthquake resistant construction. A magnitude 6.9 earthquake and tsunami occurred in the Japan region 92 km northwest of the location of this earthquake on March 21, 1982 (UTC), with estimated population exposures of 48,000 at intensity VIII and 170,000 at intensity VII, with no reported fatalities. On July 12, 1993 (UTC), a magnitude 7.7 earthquake and tsunami occurred near the Hokkaido Nansei-Oki, Japan, region 360 km west of the location of this earthquake, with estimated population exposures of 4,000 at intensity VIII and 84,000 at intensity VII, resulting in an estimated 230 fatalities. Recent earthquakes in this area have caused, landslides and fires that may have contributed to losses. USGS.

NO tsunami warning has been issued.

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Posted in Kushiro, Sapporo, Tokyo, tokyo quake | Tagged: , , , , | 1 Comment »

Another fire at TEPCO nuclear plant

Posted by feww on December 9, 2008

Fire at Tokyo Electric Power Co nuclear complex sickens worker

A fire broke out at the Kashiwazaki-Kariwa nuclear complex owned by Tokyo Electric Power Co, a spokesman said.

A worker was sickened from inhaling smoke, but there was no radiation leak from the incident, the company said.

The nuclear power complex, which was put out of action caused by extensive damage in a 2007 earthquake is reportedly undergoing repairs and quake resistance enhancement (!)

The incident occurred within two days of a full week’s inspection by a team of 10 experts from the United Nations nuclear watchdog, International Atomic Energy Agency, that was assessing earthquakes safety measures.

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Posted in earthquake damage, IAEA, Japan, quake resistance, Tokyo | Tagged: , , , , | 1 Comment »

Magnitude 6.2 Quake Hits Honshu, Japan

Posted by feww on December 4, 2008

UPDATE: The Honshu quake detailed below has been downgraded to a 5.7Mw by USGS.

A Large Mag 6.2 Earthquake Hits Near the East Coast of Honshu, Japan

The following details were provided by USGS Earthquake Hazards Program:

Magnitude: Mw 6.2 [Later downgraded to Mw 5.7]

Date-Time:

  • Wednesday, December 03, 2008 at 23:16:58 UTC
  • Thursday, December 04, 2008 at 08:16:58 AM at epicenter

Location: 38.566°N, 142.762°E
Depth: 35 km (21.7 miles) set by location program
Region: Near the East Coast of Honshu, Japan

Distances:

  • 170 km (105 miles) ENE of Sendai, Honshu, Japan
  • 190 km (120 miles) SE of Morioka, Honshu, Japan
  • 220 km (140 miles) ENE of Fukushima, Honshu, Japan
  • 420 km (260 miles) NE of TOKYO, Japan

[Mainshock was followed by a strong aftershock measuring Mw5.2 located at 38.555°N, 142.840°E, Thursday, December 04, 2008 at 12:10:54 PM time at epicenter.]

Source: USGS

No immediate reports of tsunami, damage or injuries as yet.

sendai-earthquake


Map of MMI contours plotted over population per ˜1 square km (see gray scale bar on top of map). The regions of integer MMI values are separated by the thick contour lines and labeled with Roman numerals. The total population exposure to a given MMI value is obtained by summing the population between the thick contour lines. This total is shown in population exposure table. Overall, the population in this region resides in structures that are a mix of vulnerable and earthquake resistant construction. A magnitude 6.6 earthquake 378 km Northeast of this one struck Niigata, Japan on October 23, 2004 (UTC), with estimated population exposures of 481,000 at intensity IX or greater and 386,000 at intensity VIII, resulting in an estimated 67 fatalities. Recent earthquakes in this area have caused, landslides and fires that may have contributed to losses. USGS

ja-map
Map of japan. USGS

sendai-quake-loc

Earthquake Location: USGS

Japan sits atop the Eurasian, Pacific, Philippine and North American tectonic plates whose movements cause numerous earthquakes. The country experiences about 20 percent of the world’s major earthquakes of magnitude 6 or greater.

Did you know?

With an estimated total death toll of 88,072 [as of yesterday, Dec 3, 2008,] this year has seen the second worst number of human casualties caused by earthquakes since 1980. The largest earthquake/ tsunami related casualties for the 29-year period occurred in 2004 with an estimated total of 228,802 deaths.  [The stats are based on USGS data.

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Posted in fires, landslides, population exposure, tectonic plates, Tokyo | Tagged: , , , , | 2 Comments »