Abstract

Data on earthquake focal mechanisms from the Bulletin of the International Seismological Center (ISC) have been used to study the effect of the choice of the nodal plane on the estimate for potential energy of the initial elevation in the tsunami source. For the majority of seismic events, the energy estimate has been shown to weakly depend on the choice of the nodal plane. However, in some rare cases, the energy estimates can differ significantly (by up to one order of magnitude). Usually, these significant differences are characteristic of strong shallow earthquakes, i.e., the seismic events that can effectively generate tsunami waves. In all cases when the ratio of the rupture length to the earthquake depth is small the choice of the nodal plane has almost no effect on the energy estimate.

中文翻译：

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节点平面的选择对海啸能量估计的影响

摘要

国际地震学中心（ISC）简报中有关地震震源机制的数据已被用于研究节点平面的选择对海啸源初始仰角势能估计的影响。对于大多数地震事件，能量估计已显示出弱依赖于节点平面的选择。但是，在极少数情况下，能量估算值可能会有很大差异（最多相差一个数量级）。通常，这些明显的差异是强烈的浅层地震的特征，即可以有效产生海啸波的地震事件。在所有情况下，当破裂长度与地震深度之比较小时，节点平面的选择几乎对能量估计没有影响。