Volcano tectonic earthquake
Earthquake caused by magma movement / From Wikipedia, the free encyclopedia
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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