Eastern Honshu, Japan Earthquake of July 26, 2003

Mainshock

• Origin time: July 25, 2003 22:13:31.5 UTC (JMA), 22:13:34 UTC (USGS) (July 26 07:13 Local time)
• Location: 038°24.1'N 141°10.5'E (JMA), 38.52N 140.96E (USGS)
• Depth: 12km (JMA), 33 km (USGS)
• Magnitude: 6.2 (JMA), 6.1 (USGS)

Foreshock and Aftershock

Major Foreshock

• Origin time: July 25, 2003 00:13:08.3 UTC (JMA), 15:13:11 UTC (USGS) (July 26 00:13 Local time)
• Location: 038°25.9'N 141°10.1'E (JMA), 38.43N 140.96E (USGS)
• Depth: 12km (JMA), 33 km (USGS)
• Magnitude: 5.5 (JMA), 5.3 (USGS)

Major Aftershock

• Origin time: July 25, 2003 07:56:44.5 UTC (JMA), 07:56:47 UTC (USGS) (July 26 16:56 Local time)
• Location: 038°29.8'N 141°11.6'E (JMA), 38.55N 140.96E (USGS)
• Depth: 12km (JMA), 33 km (USGS)
• Magnitude: 5.3 (JMA), 5.4 (USGS)

Damage

• Personal Injury: Dead 0, Severely Injured 15, Injured 576
• Damage on Residential Houses: Severe 88, Moderate 389, Partial 5811
  As of July 28 19:20, cf. http://www.fdma.go.jp/html/infor/index.html

Information in our site

• Preliminary Results of Rupture Process by Dr. Yagi (Japanese viersion)
• Disastrous Earthquakes in Eastern Honshu Area (From Utsu Catalogue, in Japanese)
• CMT solution determined by Direct Solution Method by Dr. Hara (coming soon)
• Prompt report on BRI Strong Motion Observation
• Japan in the Information Network of Earthquake Disaster Prevention Technologies, IISEE

Direct links

• Mainshock, USGS National Earthquake Information Center
• Foreshock, USGS National Earthquake Information Center
• Aftershock, USGS National Earthquake Information Center
• NIED Special page (Japanese)

Institutions

• United States Geological Survey (USGS), USA
• Incorporated Research Institutions for Seismology (IRIS)
• K-NET, National Research Institute for Earth Science and Disaster Prevention (NIED)
• KiK-net, National Research Institute for Earth Science and Disaster Prevention (NIED)