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6Šª
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1982”N
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481-488•Å
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PROCEEDINGS OF JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM
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Makoto KAMIYAMA, Tadashi MATSUKAWA
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RELATIONS BETWEEN EARTHQUAKE MOTION INTENSITIES AND MICROTREMORS OF GROUNDS
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The objective of this paper is to investigate possible correlations between the shaking intensities obtained during the 1978 Miyagiken-oki earthquake and their microtremors. In order to accomplish this purpose, a map showing the shaking intensities was examined and field measurements of microtremor ground motions were carried out at some sites in Sendai city. In addition to these analyses, a strong-motion earthquake accelerogram was investigated to discuss deeply. The microtremor motions were analyzed in terms of Fourier spectrum, rms value, and so on. It is concluded that a good correlation was found between the microtremor characteristics and the shaking intensities. A little discussion was also made about the reason leading such a conclusion.
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