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Historical Seismograms - Evidence from the AD 2000 Izu Islands ...

Historical Seismograms - Evidence from the AD 2000 Izu Islands ...

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Catalogue of Chinese Earthquakes (A4 2 6.5) 121MS6.0. ..... .. . .. ... .. .5.04.020 40 60 80 100 n"pCalMS6.05.04.050 100CblA"PFigure 5. Ms vs. Ap curve: (a) mainland China; (b) Taiwan Province and its neighbowingseas.The deviations between our magnitudes - and those of <strong>the</strong> 1971 and 1983 editions -of Catalogue of Chinese Earthquakes are: AM = -0.04 with c = f0.25 and AM =-0.03 and 0 = f0.23 respectively. Although <strong>the</strong> mean deviations are small, <strong>the</strong>c values are large, reflecting <strong>the</strong> large scatter. It should be pointed out that <strong>the</strong>magnitude values directly quoted <strong>from</strong> Hsu (1971) in <strong>the</strong> 1983 catalogue were notconsidered in <strong>the</strong> statistics. O<strong>the</strong>rwise, <strong>the</strong> deviation would be larger.

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