Application of Microtremors for Earthquake Disaster Evaluation Due to Regional Ground Condition

确定地震动的基本特征是本文研究的主要内容。因为实际工程中应用地脉动是可以期待的。最重要的是，为了确认脉动的稳定性和适用性，我们在福井平原进行了一次联合测量，这是一个非常重要的试验场。以1948年的福井地震为背景，考虑将其与1995年的兵库县南部地震进行比较，因为它们在震级、震源深度、极强运动和严重破坏方面具有相似性。除福井平原外，还在石狩平原、八户地区、关东平原、相模平原、野比平原、大坂和坂神平原、广岛的西条盆地等各地区进行了单独的试验。这些结果在研究期间经常举行的研究会议和研讨会上进行了报告和讨论。部分研究成果还在台湾和美国的国际会议上发表。

The principal subject of this research is to make sure the fundamental characteristics of microtremors. Because the application of microtremors to practical engineering purposes is actually expected. Most of all, to confirm the stability and applicability of microtremors, we made a joint measurements in the Fukui plain as a very important test field. As the background, the 1948 Fukui earthquake was considered to be compared with the 1995 Hyogoken-Nanbu earthquake, because of similarities on earthquake magnitude, focal depth, very strong motion and heavy damage. The joint measurements of microtremors were very successful to confirm the fundamental characteristics and its applicability.Individual experiments in each district were also made by every investigators, such as Ishikari plain, Hachinohe area, Kanto plain, Sagami plain, Nobi plain, Osaka and Hanshin plain, Saijo basin in Hiroshima, besides Fukui plain. These results were reported and discussed in the research meetings and workshops, those were held very often in the Research term. Some of the research fruits were also presented in the international conferences in Taiwan and USA.