About: San Jacinto Fault Zone

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The San Jacinto Fault Zone (SJFZ) is a major strike-slip fault zone that runs through San Bernardino, Riverside, San Diego, and Imperial Counties in Southern California. The SJFZ is a component of the larger San Andreas transform system and is considered to be the most seismically active fault zone in the area. Together they relieve the majority of the stress between the Pacific and North American tectonic plates.

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  • La Zona de la Falla de San Jacinto​ (en inglés: San Jacinto Fault Zone)​ es una importante zona de fallas de desgarre que atraviesa los condados de San Bernardino, Riverside, San Diego e Imperial, en el sur de California​ al oeste de los Estados Unidos.​ El sector es un componente de la más grande Falla de San Andrés y se considera que es la zona de una falla de mayor actividad sísmica en la zona. Juntos alivian la mayoría de la tensión entre el Pacífico y las placas tectónicas de América del Norte . El SJFZ en sí consta de muchos segmentos de fallas individuales, algunas de las cuales sólo han sido individualizados tan recientemente como en la década de 1980 , pero la actividad a lo largo de la línea de fallas se ha documentado desde la década de 1890. (es)
  • The San Jacinto Fault Zone (SJFZ) is a major strike-slip fault zone that runs through San Bernardino, Riverside, San Diego, and Imperial Counties in Southern California. The SJFZ is a component of the larger San Andreas transform system and is considered to be the most seismically active fault zone in the area. Together they relieve the majority of the stress between the Pacific and North American tectonic plates. The SJFZ itself consists of many individual fault segments, some of which have only been individualized as recently as the 1980s, but activity along the line of faults has been documented since the 1890s. One segment of the SJFZ, the Anza seismic gap, has not experienced any major activity since instrumental records have been kept. Each segment was evaluated for its seismic risk and was assigned a probability for the occurrence of a large rupture for the thirty-year period starting in 1995. While several of the large earthquakes along the SJFZ have not resulted in significant property damage or loss of life (due to their remote location) the cities of Hemet and San Jacinto were both heavily damaged in two significant events in 1899 and 1918. The recurrence interval for a series of large earthquakes starting in 1899 (including the 5.9 1937 Terwilliger Valley earthquake) was 18, 5, 14, 5, 12, 14, and 19 years, yet there has not been a strong earthquake for 35 years (since the 1987 Superstition Hills and Elmore Ranch sequence). (en)
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  • USGS ShakeMaps for the 1968 Borrego Mountain earthquake and the second mainshock in the November 1987 sequence (en)
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  • USGS Shakemap - 1968 Borrego Mountain earthquake.jpg (en)
  • USGS Shakemap - 1987 Superstition Hills earthquake.jpg (en)
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  • La Zona de la Falla de San Jacinto​ (en inglés: San Jacinto Fault Zone)​ es una importante zona de fallas de desgarre que atraviesa los condados de San Bernardino, Riverside, San Diego e Imperial, en el sur de California​ al oeste de los Estados Unidos.​ El sector es un componente de la más grande Falla de San Andrés y se considera que es la zona de una falla de mayor actividad sísmica en la zona. Juntos alivian la mayoría de la tensión entre el Pacífico y las placas tectónicas de América del Norte . (es)
  • The San Jacinto Fault Zone (SJFZ) is a major strike-slip fault zone that runs through San Bernardino, Riverside, San Diego, and Imperial Counties in Southern California. The SJFZ is a component of the larger San Andreas transform system and is considered to be the most seismically active fault zone in the area. Together they relieve the majority of the stress between the Pacific and North American tectonic plates. (en)
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  • Zona de la Falla de San Jacinto (es)
  • San Jacinto Fault Zone (en)
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