Scaling law of volcanic explosion earthquake

Details Scaling law of volcanic explosion earthquake Scaling law of volcanic explosion earthquake

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.2479n&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 22, p. 2479-2482

Mathematics

Logic

14

Earthquakes, Explosions, Geological Faults, Scaling Laws, Volcanoes, Craters, Kinetic Energy, Radii, Seismology, Volcanology

Scientific paper

The aim of the present study is to clarify a scaling law for volcanic explosion earthquakes excited by a counter force of eruption. Based on the data of explosion earthquakes at three volcanoes, we derived the following results: The peak amplitude of the single force is proportional to the square of the pulse width of source time function. The initial pressure stored in a shallow region beneath a volcano before eruption is 1 MPa with a perturbation of one order. The kinetic energy of explosion earthquake is proportional to the cube of crater radius. The scaling law of the explosion earthquake is quite similar to that of the earthquake caused by a faulting. It is possible to predict the strength of explosion earthquake by measuring the crater radius beforehand.

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