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A volcano tectonic earthquake or volcano earthquake is caused by the movement of magma beneath the surface of the Earth.[1] The movement results in pressure changes where the rock around the magma has a change in stress. At some point, this stress can cause the rock to break or move. This seismic activity is used by scientists to monitor volcanoes.[2] The earthquakes may also be related to dike intrusion and/or occur as earthquake swarms.[3] Usually they are characterised by high seismic frequency and lack the pattern of a main shock followed by a decaying aftershock distribution of fault related tectonic earthquakes.[2]: 139
- ^ 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" (PDF). Journal of Volcanology and Geothermal Research. 62 (1–4): 137–151. Bibcode:1994JVGR...62..137L. doi:10.1016/0377-0273(94)90031-0.
- ^ a b White, R; McCausland, W (2016). "Volcano-tectonic earthquakes: A new tool for estimating intrusive volumes and forecasting eruptions". Journal of Volcanology and Geothermal Research. 309: 139–155. Bibcode:2016JVGR..309..139W. doi:10.1016/j.jvolgeores.2015.10.020. ISSN 0377-0273.
- ^ 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.