Earthquakes and Water

Volume 114 of the series Lecture Notes in Earth Sciences pp 125-139


Earthquakes Influenced by Water

  • Chi-Yuen WangAffiliated withBerkeley Dept. Earth & Planetary Science, University of California Email author 
  • , Michael MangaAffiliated withBerkeley Dept. Earth & Planetary Science, University of California

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Thus far, we have focused on the effects of earthquakes on hydrological processes. This is not a one-way relationship. Changes in pore pressure can also induce earthquakes. In this chapter we thus discuss several ways in which hydrology influences seismicity. While the term and ‘induced’ and ‘triggered’ are often used interchangeably, we endeavor to refer to ‘triggered earthquakes’ when the hydrologic process adds a small contribution to the stress that causes the earthquake. For ‘induced earthquakes’, the hydrologic change plays a dominant role. In practice, the distinction can be difficult to make because the mechanisms through which water influences seismicity are not known or straightforward to quantify.