Science Gov panel identifies 25 active underwater faults in Sea of Japan

The report identified 25 active faults and fault zones with a length of 20 kilometres or more where quakes occurred repeatedly, and more tremors are expected to happen. Once quakes happen in the faults or fault zones, nearby coastal areas may log a seismic intensity of a lower 6, the third-highest level on the Japanese scale, or even higher and experience a tsunami of at least 1 meter. The report is based on exhaustive research into structures under the seabed using sound waves from a research ship. [...] In addition, part of the Toyama Trough western edge fault, with a length of some 61 km to the east of the Noto Peninsula northern coast fault zone, may have also moved. The scales of the quakes estimated at this time are based only on the lengths of the faults and do not consider the impact of recent quakes.

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