The La Crucecita earthquake ruptured on the megathrust, generating strong shaking and a modest but long‐lived tsunami. This is a significant earthquake that illuminates important aspects of the behavior of the megathrust as well as the potential related hazards. The rupture is contained within 15–30 km depth, ground motions are elevated, and the energy to moment ratio is high. We argue that it represents a deep megathrust earthquake, the 30 km depth is the down‐dip edge of slip. The inversion is well constrained, ruling out any shallow slip. It is the narrow seismogenic width and the configuration of the coastline that allow for deformation to occur offshore. The minor tsunamigenesis can be accounted for by the deep slip patch. There is a significant uplift at the coast above it, which leads to negative maximum tsunami amplitudes. Finally, tide‐gauge recordings show that edge‐wave modes were excited and produce larger amplitudes and durations in the Gulf of Tehuantepec.

中文翻译：

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2020年墨西哥拉克鲁塞西塔7.4兆瓦地震期间的高能破裂和海啸发生

拉克鲁塞奇塔地震在巨大的推力上破裂，产生强烈的震动和中度但长寿的海啸。这是一次重大地震，阐明了巨推力行为的重要方面以及潜在的相关危险。破裂发生在15-30 km的深度之内，地震动升高，能量/力矩比高。我们认为这代表着深部特大推力地震，深度30 km是滑移的下倾边缘。反演受到很好的约束，排除了任何浅层滑移。狭窄的地震发生宽度和海岸线的构造使变形在海上发生。轻微的海啸发生可以由深层滑移引起。在其上方的海岸上有明显的隆升，这导致负最大海啸振幅。最后，