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(回答先: 23日18時03分頃地震:震源地は新潟県中越地方:マグニチュード6.2:小千谷震度5強 投稿者 あっしら 日時 2004 年 10 月 23 日 18:23:56)
http://wwwneic.cr.usgs.gov/neis/bulletin/neic_pyal.html
Magnitude 6.9 NEAR WEST COAST OF HONSHU, JAPAN
Saturday, October 23, 2004 at 08:56:01 UTC
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
Magnitude 6.9
Date-Time Saturday, October 23, 2004 at 08:56:01 (UTC) - Coordinated Universal Time
Saturday, October 23, 2004 at 05:56:01 PM local time at epicenter
Time of Earthquake in other Time Zones
Location 37.20N 138.81E
Depth 15.8 kilometers
Region NEAR WEST COAST OF HONSHU, JAPAN
Reference 20 km (15 miles) NW of Niigata, Honshu, Japan
110 km (70 miles) W of Fukushima, Honshu, Japan
115 km (70 miles) W of Iwaki, Honshu, Japan
240 km (150 miles) N of TOKYO, Japan
Location Quality Error estimate: horizontal +/- 6.8 km; depth fixed by location program
Location Quality
Parameters Nst=231, Nph=233, Dmin=91.1 km, Rmss=1.03 sec, Erho=6.8 km, Erzz=0 km, Gp=66.2 degrees
Source USGS NEIC (WDCS-D)