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Earthquake Hazards Program

Magnitude 7.4 NEAR THE SOUTH COAST OF HONSHU, JAPAN
Sunday, September 05, 2004 at 14:57:18 UTC

Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver

World Location

Regional Location

Magnitude 7.4
Date-Time Sunday, September 05, 2004 at 14:57:18 (UTC) - Coordinated Universal Time
Sunday, September 05, 2004 at 11:57:18 PM local time at epicenter
Time of Earthquake in other Time Zones
Location 33.19N 137.06E
Depth 10 kilometers
Region NEAR THE SOUTH COAST OF HONSHU, JAPAN
Reference 175 km (110 miles) SSE of Tsu, Honshu, Japan
175 km (110 miles) SSW of Hamamatsu, Honshu, Japan
210 km (130 miles) ESE of Wakayama, Honshu, Japan
370 km (230 miles) SW of TOKYO, Japan
Location Quality Error estimate: horizontal +/- 3.3 km; depth fixed by location program
Location Quality
Parameters
Nst=477, Nph=477, Dmin=385.6 km, Rmss=0.89 sec, Erho=3.3 km, Erzz=0 km, Gp=27.5 degrees
Source USGS NEIC (WDCS-D)
Remarks About forty people injured in the Kyoto area. Felt in much of southwestern Japan and as far north as Tokyo. Tsunamis were observed with wave heights of 86 cm at Kushimoto and 56 cm at Owase. Power outages occured at Wakayama and a fire occurred at Sakai. Recorded (5L JMA) in Wakayama and Mie; (4 JMA) in Aichi, Fukui, Gifu, Hyogo, Kyoto, Nara, Osaka, Shiga and Tottori; (3 JMA) in Chiba, Hiroshima, Ishikawa, Kanagawa, Nagano, Okayama, Shimane, Shizuoka, Tokyo and Yamanashi; (2 JMA) in Gumma, Ibaraki, Niigata, Saitama, Tochigi and Yamaguchi; (1 JMA) in Miyagi Prefectures. Recorded (3 JMA) in Kagawa, Kochi and Tokushima; (2 JMA) in Ehime Prefectures, Shikoku. Recorded (1 JMA) in Fukuoka, Kumamoto, Miyazaki, Oita and Saga Prefectures, Kyushu. Also recorded (3 JMA) on Hachijo- jima, Kozu-shima, Miyake-jima, Nii-jima and O-shima; (2 JMA) on Dogo, Mikura-jima and in the Dozen islands; (1 JMA) on Sadago-shima.

NB: 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, at the time that this page was created. Other magnitudes associated with web pages linked from here are those determined at various times following the earthquake with different types of seismic data. Although, given the data used, they are legitimate estimates of magnitude they are not considered the official magnitude.

The region name is an automatically generated name from the Flinn-Engdahl (F-E) seismic and geographical regionalization scheme. The boundaries of these regions are defined at one-degree intervals and therefore differ from irregular political boundaries. More->

 



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