In Nagano Prefecture, there is the Matsushiro Earthquake Research Center. The center was established inside the Matsushiro Earthquake Observatory, Japan Meteorological Agency in 1967. The background of the establishment was based on the world rare earthquake swarm in the area. There were 6,780 earthquakes were observed from 1965 to 1969 and became social issues.

There are two famous stories about the establishment. The first story is, the mayor, Mr. Nakamura declared “We want to have science and research rather than equipments and money” after the earthquake swarm. This attracts the center. The second, the location is the place which had the planned underground imperial headquarter just before the end of the second world war. This explains the location is deep underground and has a strong structure. So, this means the best location to place seismometer.

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