Editing Volcano tectonic earthquake (section)

== Cause of volcano tectonic earthquakes ==
[[File:Four-types-seismograms.gif|thumb|upright=1.35|Four types of [[seismogram]]s, or seismic signatures]]
One possible scenario resulting in a possible volcano tectonic earthquake occurs in [[Subduction zones|tectonic subduction zones]]. The compression of plates at these subduction zones forces the magma beneath them to move.<ref name=":0">{{Cite book|last=Schmincke|first=H. U.|date=2004|title=Volcanism|language=en-gb|doi=10.1007/978-3-642-18952-4|isbn=978-3-642-62376-9}}</ref> Magma can not move through the newly compressed crust as easily. This means it tends to pool in [[magma chamber]]s beneath the surface and between the [[Tectonic plates|converging tectonic plates]]. Many of the famous and most well known volcanoes are of this type, including those of the [[Ring of Fire]]. As the plates move, magma underground may be forced in and out of these chambers and form intrusions into surrounding crust. This movement is capable of causing the unstable rocks around it to cave in or shift. The movement of this magma as described, causes measurable seismic activity.<ref name=":0" /> Where plates diverge such as at [[mid-ocean ridge]]s the magma also can move into storage chambers and form intrusions again causing shifts in the rocks around them that can be detected as earthquakes. This is separate from earthquakes directly related to faults. However it is known than tectonic earthquake triggering has occurred with some volcanic eruptions, and there may be other associations of these in place and time with some eruptions, which could cause confusion because of the similar terminology.<ref>{{cite journal|last1 =Eggert|first1 =S.|last2 =Walter| first2=T.R.|year =2009|title =Volcanic activity before and after large tectonic earthquakes: Observations and statistical significance|journal= Tectonophysics|volume =471|issue=1-2|pages =14–26|doi =10.1016/j.tecto.2008.10.003 |url =https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=26e607f7789a0e4901756e683d59c260428254c7|access-date=26 December 2023|url-access =subscription}}</ref>

Scientists monitoring volcanoes have noticed that magma movement may lead to earthquake swarms depending on the movement of magma and the interaction with rock beneath the ground. Additionally, the volatility of volcanoes and the accompanying earthquakes has been shown to be linked to dike induced stress and the interaction this causes between the magma, rock, and wall of the chamber.<ref name=":12" />