The Katla Subglacial Volcano: Earthquakes and Evidence for Crustal Magma Chambers

Details The Katla Subglacial Volcano: Earthquakes and Evidence for Crustal Magma Chambers The Katla Subglacial Volcano: Earthquakes and Evidence for Crustal Magma Chambers

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000mpse.conf...36e&link_type=abstract

International Conference on Mars Polar Science and Exploration, p. 36

Mathematics

Logic

Iceland, Earthquakes, Volcanoes, Seismology, Crusts, Seismic Waves, Pressure Reduction, Position (Location), Magma

Scientific paper

Seismological methods can be used effectively to study the internal structure and dynamics of volcanoes. Hypocenters of earthquakes provide information on the location of physical events, focal mechanism studies give information on their nature. Seismic waves that have propagated through the roots of volcanoes carry information on the physical state of the material there, e. g. location of magma chambers. Eruptive activity is usually accompanied by seismic activity which can give invaluable information on processes in the crust such as magma migration. Several of the Icelandic central volcanoes, including the subglacial Katla volcano in South Iceland, are the source of persistent seismic activity in spite of little other apparent signs of volcanic unrest. Several physical processes can cause these earthquakes, such as slow inflation or deflation of a shallow-level magma chamber, intrusion of magma into the shallow crust, or thermal cracking due to heating or cooling of brittle crustal material. Additional information is contained in original extended abstract.

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