Scholarlink

<p>The slip models for the 1993 (Mw 7.2) and 2012 (Mw 7.4) events are determined in this study. The rupture of both events indicates that they propagated toward up-dip and do not overlap. In the case of the 1993 event, two asperities ruptured, suggesting complex faulting, similar to the rupture of the 1970 event (Mw 7.3), proposed by Yamamoto and Mitchell (1988). The 1993 and 2012 events broke adjacent segments of the subduction zone. The Tehuantepec gap has been recognized as an area of high seismic potential, because no large or great interplate earthquakes have occurred in the last 120&#xa0;years. To the southeast of the Tehuantepec gap, where the 1970 and 1993 earthquakes took place, the Chiapas and northwestern segments of the Guatemala subduction zone have not experienced earthquakes larger than 7.4 in instrumental times. The Chiapas interplate contact to the southeast of the Tehuantepec gap has been broken only by three relatively moderate events in 1970, 1993, and 2012. Presumably, this region is highly coupled according to GPS studies. In this complex region of the Mesoamerican subduction zone, it is possible that the Tehuantepec gap, as we know it today, has the potential to produce a very large earthquake if the two adjacent regions in Chiapas and Guatemala are considered part of the same gap.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Ruptures of major earthquakes in the Chiapas and Guatemala subduction zones: implications for tectonic deformation and seismic risk

  • 期刊论文

  • 发表日期：

    2026年1月16日

查看全文
  • M. Rosario Martínez-López,
  • Gerardo Suárez

摘要

The slip models for the 1993 (Mw 7.2) and 2012 (Mw 7.4) events are determined in this study. The rupture of both events indicates that they propagated toward up-dip and do not overlap. In the case of the 1993 event, two asperities ruptured, suggesting complex faulting, similar to the rupture of the 1970 event (Mw 7.3), proposed by Yamamoto and Mitchell (1988). The 1993 and 2012 events broke adjacent segments of the subduction zone. The Tehuantepec gap has been recognized as an area of high seismic potential, because no large or great interplate earthquakes have occurred in the last 120 years. To the southeast of the Tehuantepec gap, where the 1970 and 1993 earthquakes took place, the Chiapas and northwestern segments of the Guatemala subduction zone have not experienced earthquakes larger than 7.4 in instrumental times. The Chiapas interplate contact to the southeast of the Tehuantepec gap has been broken only by three relatively moderate events in 1970, 1993, and 2012. Presumably, this region is highly coupled according to GPS studies. In this complex region of the Mesoamerican subduction zone, it is possible that the Tehuantepec gap, as we know it today, has the potential to produce a very large earthquake if the two adjacent regions in Chiapas and Guatemala are considered part of the same gap.