The JMA reports the earthquake level based on the ground acceleration, measured automatically with seismic intensity meters.
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The results of the past two games have set the intensity meter on a high level for today's 92nd game in the series.
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The JMA operates a network of 180 seismographs and 627 seismic intensity meters and provides real-time earthquake reports to the media and on the Internet.
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The result was the seismic intensity meter _ a device about the size and shape of a brick _ that beams intensity readings over land and via satellite to government offices, broadcasters and local emergency crews.