Abstract
The author investigated seismic activity, during the past 100 years, for the earthquakes (5.0≤M) in the southern part of Central Honshu, where the Philippine Sea plate is descending with a low dip angle. The migration of earthquakes towards northwest occurred twice. One, from 1905 to 1930, and the other, from 1935 to the present. The velocity of migration was about 2.5km/year for both cases. It seems that the earthquakes in the block have been occurring periodically rather than at random. The period of the activity is about 6 to 10 years. These results give us useful information for the prediction of earthquake occurrences in long term. It was also found that the area of Lake Hamana is most active in the investigated region.
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Schedule a callMore From: Zisin (Journal of the Seismological Society of Japan. 2nd ser.)
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