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Powerful Earthquake Strikes Near Izu Islands, Japan

Posted by feww on August 9, 2009

Magnitude 7.1 Quake Occurs Near Izu Islands, Japan Region

A powerful earthquake measuring 7.1Mw occurred about 165km W of Hachijo-jima, Izu Islands, Japan, USGS reported, striking at a depth of 303.1km at 10:55:56 UTC.

Japan’s Meteorological agency said there was NO tsunami threat caused by this earthquake.

According to Reuters News Agency, quoting the national broadcaster, NHK, some high-speed train services were briefly suspended, while the tracks were checked, but no damage was reported.

This event raises the probability of FEWW forecast for Tokyo region to about 0.9 (86%).

Earthquake details:

  • Magnitude: 7.1
  • Date-Time
    • Sunday, August 09, 2009 at 10:55:56 UTC
    • Sunday, August 09, 2009 at 07:55:56 PM at epicenter
  • Location: 33.144°N, 138.040°E
  • Depth: 303.1 km (188.3 miles)
  • Region: IZU ISLANDS, JAPAN REGION
  • Distances
    • 165 km (100 miles) W of Hachijo-jima, Izu Islands, Japan
    • 175 km (110 miles) S of Hamamatsu, Honshu, Japan
    • 205 km (130 miles) S of Shizuoka, Honshu, Japan
    • 320 km (200 miles) SSW of TOKYO, Japan
  • Location Uncertainty: horizontal +/- 5 km (3.1 miles); depth +/- 8.9 km (5.5 miles)
  • Parameters: NST=201, Nph=201, Dmin=668.8 km, Rmss=0.85 sec, Gp= 29°, M-type=teleseismic moment magnitude (Mw), Version=7
  • Source: USGS NEIC (WDCS-D)
  • Event ID: us2009kcaz

10-degree Map Centered at 35°N,140°E

us2009kcaz izu
Earthquake Location Map. Source: USGS

Earthquake Location. [USGS.]

us2009jyab eq-loc
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green.

For additional location maps click here.

Historic Seismicity [Source: USGS]

us2009kcaz izu HisSeis
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Seismic Hazard Map [Source: USGS]
us2009kcaz-izu SeisHaz

Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Related Links:

3 Responses to “Powerful Earthquake Strikes Near Izu Islands, Japan”

  1. […] Powerful Earthquake Strikes Near Izu Islands, Japan [August 9, 2009] […]

  2. feww said

    5th Strong Quake Strikes Japan Region
    https://feww.wordpress.com/2009/08/17/5th-strong-quake-strikes-japan-region/

  3. […] Powerful Earthquake Strikes Near Izu Islands, Japan […]

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