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4 - Volcanic Earthquakes

Published online by Cambridge University Press:  18 April 2020

Agust Gudmundsson
Affiliation:
Royal Holloway, University of London
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Summary

Volcanic (or volcano) earthquakes are those that occur inside volcanoes or close to them. The study of these earthquakes in volcanoes is commonly referred to as volcano seismology. Most earthquakes associated with volcanoes occur at comparatively shallow depths, normally of less than 10 km. They differ from other earthquakes at plate boundaries partly in that volcanic earthquakes commonly occur in swarms, that is, clusters in time and space of many comparatively small and similar-sized earthquakes. Volcanic earthquakes provide information about the state of stress in the volcano and of eventual magma-chamber rupture during unrest periods (e.g. Massa et al., 2016). They also indicate the location and, crudely, the size of magma chambers. When a dike (or an inclined sheet) is injected from a magma chamber, the formation of its propagation path (dike-fracture path) produces earthquakes. Thus, accurate monitoring of earthquakes during such events can be used to map out the propagation path of the dike and help assess the likelihood of the dike (or inclined sheet) reaching the surface, causing an eruption.

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  • Volcanic Earthquakes
  • Agust Gudmundsson, Royal Holloway, University of London
  • Book: Volcanotectonics
  • Online publication: 18 April 2020
  • Chapter DOI: https://doi.org/10.1017/9781139176217.005
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  • Volcanic Earthquakes
  • Agust Gudmundsson, Royal Holloway, University of London
  • Book: Volcanotectonics
  • Online publication: 18 April 2020
  • Chapter DOI: https://doi.org/10.1017/9781139176217.005
Available formats
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Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Volcanic Earthquakes
  • Agust Gudmundsson, Royal Holloway, University of London
  • Book: Volcanotectonics
  • Online publication: 18 April 2020
  • Chapter DOI: https://doi.org/10.1017/9781139176217.005
Available formats
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