Tokachi-oki Earthquake of September 26, 2003

Mainshock

• Epicenter: Off Tokachi, Hokkaido, Japan
• Origin time: September 25, 2003 at 19:50:07.64 UTC (JMA), 19:50:06 UTC (USGS) (Sep. 26 04:50 Local time)
• Location: 41°46.78'N 144°4.71'E (JMA), 41.78N 143.86E (USGS)
• Depth: 42km (JMA), 27 km (USGS)
• Magnitude: 8.0 (JMA), 8.3 (USGS)

Damage

• Personal Injury: Missing 2, Seriously Injured 59, Slightly Injured 696
• Damage on Residential Houses: Collapsed 12, Partially Destroyed 501
  As of October 2 12:00 (Local Time), cf. http://www.fdma.go.jp/html/infor/index.html

Information in our site

• Preliminary Results of Rupture Process by Dr. Yagi (Japanese viersion)
• CMT solution determined by Direct Solution Method by Dr. Hara
• Prompt report on BRI Strong Motion Observation (Japanese viersion)
• Japan in the Information Network of Earthquake Disaster Prevention Technologies, IISEE

Direct links

• Mainshock, USGS National Earthquake Information Center
• Major Aftershock, USGS National Earthquake Information Center
• Special Page of Earthquake Research Institute (ERI), Tokyo University

Online News (in Japanese)

• Yahoo Japan (Photo page)
• Yomiuri Online (Photo page)
• Asahi.com (Photo page)
• Hokkaido Shimbun Press (Photo page)

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)