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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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Digitization and Processing of J.M.A. Strong Motion Records 397Table 3. List of Peak Values of Ground Motions for Each ComponentEarthquake Station A I N- S Component E - W ComponentS anriki- OkiIwaki-OkiFukushima-Ken-Toho-OkiTonankaiNaknaidoTokachi- 0 kiNihonkai-ChubuSendaiMitoMito(1st)(2nd)(3rd)Sendai(1st)(3rd)MurotomisakiMishimaSumotoMiyazakiAkitaSkataNiigataMoriNiigataTomakomai(km) Die. Vel. ACC. Die. Vel. Acc.(cm) (kine) (gal) (cm) (kine) (gal)332 5 6.5 3.4 6.3 - - -49 5 8.7 9.4 24.1 15.0 12.8 25.1122 5 14.2 7.0 8.1 17.7 9.4 10.8150 5 11.4 6.3 5.0 23.3 12.1 7.0164 4 7.3 5.5 7.8 20.8 11.3 8.8184 4 - - - 5.3 5.2 10.8164 4 -- -2.7 2.1 3.7178 4 6.9 9.7 27.7 4.8 3.6 6.6313 4 5.4 4.0 8.1 7.5 9.6 26.0208 5 - --18.9 8.9 19.7296 4 --- 5.3 5.9 16.9246 4 8.0 10.2 23.2 9.8 11.2 25.2377 3 9.8 8.4 19.1 9.2 9.3 20.8501 3 10.2 6.0 11.2 8.9 6.2 8.6231 4 7.9 7.5 17.9 9.8 6.6 14.9272 3 13.5 9.7 13.6 12.0 6.4 10.1328 2 8.3 7.4 9.9 11.0 6.9 8.3A = Epicentral distance in km; I = Intensity (J.M.A. scale).2c'=lISN- h=OI %- - h=20%ZCZiA , , 1 , 1 1I , , , f- I 1 1 1ii'10 b2 10PERIOD csec,20 7 Lla) S-N CoTFonent20PEF; OD rSPCj(b) W-E componentFigure 6. Velocity response spectra, Sv, for <strong>the</strong> record at Mishima <strong>from</strong> <strong>the</strong> 1944Tonankai event.

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