Volcanic Earthquake 1
Volcanic Earthquake 1 : Natural Disaster. An earthquake characterised by high-frequency seismic signals thought to be generated by the fracturing of rock in response to the intrusion and migration of magma. Volcanic earthquakes always precede the onset of volcanic activity, although they do not always culminate in a volcanic eruption. They often occur in swarms. Volcanic earthquakes are the most effective monitoring tool for predicting a volcanic eruption. In some cases they may in themselves be severe enough to cause significant damage. A sequence of volcanic earthquakes in Montserrat between 1931 and 1938 destroyed a large number of buildings, and volcanic earthquakes in Dominica between 1998 and 2000 triggered numerous rock falls and landslides. See Earthquake Swarm
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