Magnitude 6.6 NEAR THE WEST COAST OF HONSHU, JAPAN
Saturday, October 23, 2004 at 08:56:00 UTC
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
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Magnitude | 6.6 | |
| Date-Time |
Saturday, October 23, 2004 at 08:56:00 (UTC) - Coordinated Universal Time Saturday, October 23, 2004 at 05:56:00 PM local time at epicenter Time of Earthquake in other Time Zones |
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| Location | 37.24N 138.72E | ||
| Depth | 16 kilometers | ||
| Region | NEAR THE WEST COAST OF HONSHU, JAPAN | ||
| Reference |
80 km (50 miles) SSW of Niigata, Honshu, Japan 85 km (50 miles) NE of Nagano, Honshu, Japan 95 km (60 miles) NNW of Maebashi, Honshu, Japan 195 km (120 miles) NNW of TOKYO, Japan |
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| Location Quality | Error estimate: horizontal +/- 3.6 km; depth fixed by location program | ||
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Location Quality Parameters |
Nst=724, Nph=724, Dmin=91.1 km, Rmss=1.07 sec, Erho=3.6 km, Erzz=0 km, Gp=37.0 degrees | ||
| Source | USGS NEIC (WDCS-D) | ||
| Remarks | At least 39 people killed, 3,183 injured and 6,000 buildings destroyed or damaged in Niigata Prefecture. A high-speed train derailed; several roads, bridges and rail lines damaged; at least 1,300 landslides and 11 fires occurred; several gas, water and power lines damaged in Niigata Prefecture. Felt in Chiba, Fukushima, Gumma, Kanagawa, Miyagi, Saitama and Tokyo Prefectures. |
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The official magnitude for this earthquake is indicated at the top of this page.
This was the best available estimate of the earthquake's size,
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