Abstract

To highlight the importance of small earthquakes in seismic hazard, we present a study of the 11 May 2016, M_w 4.9, Tesistan earthquake. According to historical data from instrumental seismicity, this earthquake represents the largest event recorded near Guadalajara. Due to the close proximity of the event to the city, accelerations were considerable higher than those caused by historical severe earthquakes. From the analysis of regional seismicity, its occurrence: (i) shows a clear correlation with seismicity in the subduction zone and (ii) appears to be related to tectonic activity along a previously unmapped SE extension of the faults which form the northern wall of the Plan de Barrancas/Santa Rosa Graben, located to the northwest within the more regional Tepic-Zacoalco Rift. The analysis of the two strong ground motions recorded within the city reveals considerable site effects.

中文翻译：

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2016年5月11日的墨西哥Tesistan地震（M w 4.9）：构造，地震环境和地震动分析

摘要

为了突出地震危险性小地震的重要性，提出了2016年5月11日，的研究中号_{w ^}4.9。Tesistan地震。根据仪器地震活动的历史数据，该地震是瓜达拉哈拉附近记录的最大事件。由于该事件离城市很近，因此加速度远高于历史严重地震造成的加速度。从区域地震活动性的分析来看，它的发生：（i）与俯冲带的地震活动性具有明显的相关性；（ii）似乎与沿先前未映射的断层东南延伸的构造活动有关，形成了北半球的北壁。 Plan de Barrancas / Santa Rosa Graben计划，位于西北地区，位于提比卡-扎科阿尔科大裂谷地区。对城市中记录的两次强烈地面运动的分析显示出相当大的场地影响。