Earthquake Research Institute, The University of Tokyo

Special Event Page
- The Niigataken Chuetsu-oki Earthquake in 2007 -

[Update 2007.07.18 13:11]

[Japanese]





A strong earthquake occured on 10:13, July 15, 2007(JST) at the Niigataken Chuetsu-oki. In the Niigata prefecture and Nagano prefecture, it is observed that the seismic ground motion was the intensity 6 upper. The magnitude of this earthqake is Mj6.6 (determined by JMA). We plan to open the information and flash report of this event.
The epicenter of this earthquake(determined by JMA) and the source region of the Niigata earthquake in 1964(orange). After Earthquake Research Committee (1999), " Seismicity of Japan "

Aftershock Observation
Urgent seismic observation group for the Niigataken Chuetsu-oki Earthquake in 2007 (provisional named)
  (Under contemplation, in Japanese) [2007/07/16]

Aftershock Activity
Aftershock activity of the Niigataken Chutestu-oki earthquake (in Japanese)
   (Earthquake Observation Center) [2007/07/17] 

Strong Motion
The Niigataken Chuetsu-oki earthquake   - Strong motion and Long period seismic motion - (in Japanese)
  (Strong motion group) [2007/07/16]  Update!
Source process (in Japanese)
  (Strong motion group) [2007/07/17] 


Geological Survey
Geological background on the Niigataken Chuestu-oki earthquake (in Japanese) [2007/07/17]

Source Information
CMT analysis, GRiD MT, Broad band waveform records (in Japanese) (Earthquake Information Center)[2007/07/16]

The records of Seismic Waveform
Seismic waveforms collected by Jarray [Show waveforms](flash)  (Earthquake Information Center)[2007/07/16]
Seismic ground motion of ERI buildings (in Japanese) recorded at IT strong motion seismometer (in Japanese) [2007/07/18] NEW!


Other Reports and Special pages

Copyright 2007 ERI. All rights reserved.