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2004.10.23 Mw6.6 Niigata, Japan
Magnitude 6.6 # Date-Time Saturday, October 23, 2004 at 08:56:00 (UTC) = Coordinated Universal Time # Saturday, October 23, 2004 at 5:56:00 PM = local time at epicenter Location 37.226°N, 138.779°E Depth 16 km (9.9 miles) set by location program Region NEAR THE WEST COAST OF HONSHU, JAPAN Distances 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 Location Uncertainty horizontal +/- 3.6 km; depth fixed by location program Parameters Nst=724, Nph=724, Dmin=91.1 km, Rmss=1.07 sec, Gp= 37°, M-type=teleseismic moment magnitude (Mw)
- Ground Motion and Rupture Process of the 2004 Mid Niigata Prefecture Earthquake Obtained from Strong Motion Data of K-NET and KiK-net
- *Honda R., S. Aoi, H. Sekiguchi, N. Morikawa, T. Kunugi, H. Fujiwara. (*National Research Institute for Earth Science and Disaster Prevention, **National Institute of Advanced Industrial Science and Technology)
- USGS-NEIC: Niigata earthquake, 2004.10.23
- Magnitude 6.6 # Date-Time Saturday, October 23, 2004 at 08:56:00 (UTC) = Coordinated Universal Time # Saturday, October 23, 2004 at 5:56:00 PM = local time at epicenter Time of Earthquake in other Time Zones Location 37.226°N, 138.779°E Depth 16 km (9.9 miles) set by location program Region NEAR THE WEST COAST OF HONSHU, JAPAN Distances 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 Location Uncertainty horizontal +/- 3.6 km; depth fixed by location program Parameters Nst=724, Nph=724, Dmin=91.1 km, Rmss=1.07 sec, Gp= 37°, M-type=teleseismic moment magnitude (Mw)
- KiK-net data
- K-NET data format and station info.
- Animation of 2004 mid-Niigata earthquake seismic wave propagation
- After main-shock. 900KB
- Hypocentral location from KiK-net data
- 2004/10/23 The Niigata-ken Chuetsu earthquake
- Strong-motion waveform stack
- 2004/10/23 The Niigata-ken Chuetsu earthquake
- NIGH12
- Strong-motion data from station NIGH12, Yunotani, 13km from epicenter.
- NIGH01
- Strong-motion data from station NIGH01, Nagaoka, 15km from epicenter.
- NIGH16
- Strong-motion data from station NIGH16, Itoigawa, 99km from epicenter.
- TCGH11
- Strong-motion data from station TCGH11, Imaichi, 103km from epicenter.
- YMNH10
- Strong-motion data from station YMNH10, Hayakawakita, 201km from epicenter.
- YMNH14
- Strong-motion data from station YMNH14, Tsuru-s, 198km from epicenter.
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