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Posts Tagged ‘japan earthquake 2009’

Magnitude 6.2 Quake Strikes Kyushu, Japan

Posted by feww on September 3, 2009

Strong 6.2 Mw quake strikes off the south-western tip of the Island of Kyushu, Japan

The earthquake, reported by various seismic monitoring centers, occurred on Thursday, September 03, 2009 at 13:26 UTC at a depth of about 160 km some 70 km SW of Kagoshima, Kyushu, Japan.

The 6th strong quake to strike Japan Region in the past several weeks, this event was consistent with FEWW earlier forecast. On August 17, FEWW Moderators  forecast a series of  powerful earthquakes in the region and said as many as 10 additional magnitude 6+ quakes could yet strike the region in coming weeks.

Summary of this earthquake:

GFZ Potsdam – Earthquake Bulletin
Region:     Kyushu, Japan
Time:     2009-09-03 13:26:18.4 UTC
Magnitude:     6.2
Epicenter:     130.19°E   31.18°N
Depth:     166 km

© Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum – GFZ


JMA Map shows the intensity of th equake as recorded by various stations throughout the Islands of Kyushu and Honshu, Japan.
Image may be subject to copyright.

Japan Meteorological Agency (JMA) reported NO tsunami caused by  this quake.

There was no report of any casualties at the time of posting.

10-degree Map Centered at 30°N,130°E

Magnitude 6.2 - KYUSHU - JAPAN 3-09-09

Earthquake Location Map. Source: USGS/EHP. Enhanced by FEWW.

Seismic Hazard Map [Source: USGS]

kyushu 3-09-09  neic_lcaq_w -
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Historic Seismicity [Mag 7+ EQs since 1900] – USGS

kyushu 3-09-09 neic_lcaq_7
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Related Links

Posted in Earthquakes, Fukuoka, global earthquakes, Okinawa Islands, seismic activity report, Seismic Hazard | Tagged: , , , , , , | Leave a Comment »

3rd Powerful Quake in 3 Days Strikes Japan Region

Posted by feww on August 13, 2009

More Powerful Quakes May Strike Region:FEWW

Magnitude 6.7 Mw the third significant quake to strike Japan region in three days

Another powerful earthquake measuring 6.7Mw occurred about 60km ESE of Hachijo-jima, Izu Islands, Japan Region, USGS reported, striking at a depth of 51 km at 22:48:51 UTC on Wednesday.

A moderate aftershock measuring 4.7 reportedly occurred about three hours later, on Thursday, August 13, 2009 at 01:53:06 UTC [USGS Event ID: us2009kgad.]  See smaller square in red superimposed on the mainshock marked in orange.

10-degree Map Centered at 35°N,140°E

us2009kfcp
Earthquake Location Map. Source: USGS

This Earthquake

  • Magnitude: 6.7
  • Date-Time:
    • Wednesday, August 12, 2009 at 22:48:51 UTC
    • Thursday, August 13, 2009 at 07:48:51 AM at epicenter
  • Location: 32.816°N, 140.382°E
  • Depth: 51 km (31.7 miles) set by location program
  • Region: IZU ISLANDS, JAPAN REGION
  • Distances:
    • 60 km (40 miles) ESE of Hachijo-jima, Izu Islands, Japan
    • 300 km (190 miles) SE of Shizuoka, Honshu, Japan
    • 320 km (200 miles) S of TOKYO, Japan
    • 325 km (200 miles) SE of Hamamatsu, Honshu, Japan
  • Location Uncertainty:  horizontal +/- 5.6 km (3.5 miles); depth fixed by location program
  • Parameters:  NST=156, Nph=156, Dmin=>999 km, Rmss=1 sec, Gp= 58°, M-type=teleseismic moment magnitude (Mw), Version=8
  • Source: USGS NEIC (WDCS-D)
  • Event ID: us2009kfcp

This earthquake was the third significant seismic event to strike Japan region in just over 72 hours.

1. A powerful earthquake measuring 7.1Mw struck about 165km W of Hachijo-jima, Izu Islands, Japan, at a depth of 303.1km at on August 9, 2009 at 10:55:56 UTC. [EQ No 1 on the location map below.]

2. A strong earthquake measuring 6.4 occurred about 30km SSW of Shizuoka, Japan, at a depth of 30km at 20:07:07 UTC on Monday, August 10, 2009. [No 2 on the location map below.]

3. A 3rd earthquake [this report] measuring 6.7 occurred about 60km ESE of Hachijo-jima, Izu Islands, Japan region at a depth of 51 km at 22:48:51 UTC on August 12, 2009. [No 3 on the location map below.]

Location map japan quakes
Location map of the three significant earthquakes that struck Japan between 9 and 12 August 2009. Original Map: USGS

Earthquake Location Maps [USGS]

neic_kfcp_cy  izu  12aug 2009

neic_kfcp -  izu  12aug 2009 zoom in
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green [Source: USGS]

Seismic Hazard Map
neic_kfcp_w  izu
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green [Source: USGS]

Historic Seismicity
us2009kcaz izu HisSeis
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green [Source: USGS]

Tsunami Information

Japan Meteorological Agency reported NO tsunami damage by this earthquake, but said there may be slight sea level changes in the region.

Related Links:

Posted in 3rd Japan Quake, earthquake forecast, Hachijo-jima, seismic event report, Shizuoka | Tagged: , , , , | 3 Comments »