In light of the July 16, 2007, Niigata-Chuetsu-Oki Earthquake (magnitude 6.8, 
distance from epicenter 16 km, focal distance 23 km), The Tokyo Electric Power 
Company, Inc. (TEPCO) will appropriately reflect the knowledge obtained through 
this earthquake  in its evaluation of earthquake safety at the TEPCO Kashiwazaki-Kariwa 
Nuclear Power Station.
As part of the Kashiwazaki-Kariwa Nuclear Power Station's earthquake-resistant 
design, detailed surveys of both the land and sea were performed, including 
maritime acoustic exploration. In light of the recent earthquake, TEPCO hereby 
announces that it will carry out geological surveying by maritime acoustic 
exploration in the sea adjacent to the power station, including the area in 
which aftershocks of the Niigata-Chuetsu-Oki Earthquake occurred.

Appendix
Reference:Geological Survey in the Sea Adjacent to the Kashiwazaki-Kariwa Nuclear 
          Power Station in Light of the Niigata-Chuetsu-Oki Earthquake(PDF 203KB)