Volcano tectonic earthquake

Earthquakes
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Fault movement Volcanism Induced seismicity
Characteristics
Epicenter Hypocenter Shadow zone Seismic wave P-wave S-wave
Measurement
Seismic scales Seismometer Earthquake duration magnitude
Prediction
Coordinating Committee for Earthquake Prediction Earthquake-sensitive person
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Shear wave splitting Adams–Williamson equation Flinn–Engdahl regions Earthquake engineering Seismite Seismology
Earth Sciences Portal Category • Related topics

A volcano tectonic earthquake is an earthquake induced by the movement (injection or withdrawal) of magma.^[1] The movement results in pressure changes in the rock around where the magma has experienced stress. At some point, the rock may break or move. The earthquakes may also be related to dike intrusion and may occur as earthquake swarms.^[2] An example is the 2007–2008 Nazko earthquake swarm in central British Columbia, Canada.

Other types of seismic activity related to volcanoes and their eruptions are long period seismic waves, which are from sudden sporadic movement of magma, which is blocked from moving due to a blockage. Another is a harmonic tremor, which is steady movement of magma, deep in the mantle.

References

↑ Lahr, J. C.; Chouet, B. A.; Stephens, C. D.; Power, J. A.; Page, R. A. (1994). "Earthquake classification, location, and error analysis in a volcanic environment: implications for the magmatic system of the 1989-1990 eruptions at Redoubt Volcano, Alaska". Journal of Volcanology and Geothermal Research 62 (1–4): 137–151. Bibcode:1994JVGR...62..137L. doi:10.1016/0377-0273(94)90031-0.
↑ Roman, D. C.; Cashman, K. V. (2006). "The origin of volcano-tectonic earthquake swarms". Geology 34 (6): 457–460. Bibcode:2006Geo....34..457R. doi:10.1130/G22269.1.