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印度半岛上科依纳—瓦尔纳地区的地震被认为是由水库引发的。但是,通过对可用地震资料的分析表明,该地区持续高发的地震活动还有可能受到断层带的几何形态及其通过应力传递的相互作用的影响。从地震分布及其震源机制推断的这些明显的断层带的取向表明,在一个断层带内发生的地震事件会增加另一个断层带上的静应力,使该地区频繁而且连续地发生地震。本文的结果表明,虽然水库作用的效应确实会促使断层滑动,但是应力触发机制似乎是持续高发地震活动的一个重要原因,因为它会使一些稳定的断层变得不稳定,这与我们所推断的运动方式是一致的。 相似文献
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After the horizontal pendulum is used in ground-tilt measurement, its scaling has drawn great attentions from the people, because without a correct calibration of scale value, the observation is of little application sig- nificance. From the 1920′s, quite a few scholars were engaged in the researches in this respect. And this question was satisfactorily solved until 1962 when Verbaandert (1962) invented the bulging plate, i.e., mercury-cup scaler. After further improvement, the V-M quartz ho… 相似文献
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用强地面运动资料,包括井下观测得到的前第三系基岩加速度资料,估算了日本中部关东地区地壳中剪切波的衰减特征,在0。5到16Hz的离散频率范围内确定了品质因子Qs(f),资料来源为13个震源深度不到50km的地方震,震源位于菲律宾海板块内,以及欧亚愉下部与菲律宾海板块上部的边界带处。 相似文献
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实地调查表明,山西长治断裂由三段组成,南段和中段为西倾正断层,北段为东倾正断层,总体走向北东25o,长达65km,控制着附近山地与第四纪山间盆地的构造演化和地貌发育;第四纪早期,断裂发生强烈的垂直差异活动,最大垂直活动幅度可达400m左右;第四纪晚期,断裂活动性明显减弱,中段仍有活动,至少发生过两期活动,第—期活动发生于距今10.88万年左右或以后、1.49万年以前,第二期活动发生于距今1.49万年以后,垂直错距0.65m。 相似文献
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Taking the northeastern Fujian area as an example, we provide some new technological ideas and contents for the historical earthquake investigation of significant engineering construction sites. ① Make sure the integrity of earthquake materials with reference to the regional histories of culture and disasters; ② Evaluate the influence of historical earthquakes on the basis of actual records, review and identify the epicenter location and magnitude of destructive earthquakes. The research by the new technological ideas will endue the investigation of historical earthquakes with new meanings in the cultural phylogeny and credible time domain, so as to make the results of historical earthquake research more scientific. The aim of the paper is to improve the level of historical earthquake investigation for a better service to the engineering construction. 相似文献