Publication Date:
1976-01-01
Description:
A volcano containing a pressurized magma chamber is approximated by a centre of dilatation embedded in a semi-infinite isotropic elastic medium. Stresses corresponding to a given surface strain are used to compute the associated piezomagnetic surface anomaly field. Comparison with results taken from a proton precession magnetometer array on Kilauea volcano, Hawaii indicates that stresses associated with shallow centres of inflation beneath the volcano are less than those expected from an elastic model. The most plausible explanation appears to be anelastic deformation of the volcano, leading to an effective crustal rigidity an order of magnitude less than that for competent basalt. © 1976, Society of Geomagnetism and Earth, Planetary and Space Sciences. All rights reserved.
Print ISSN:
0022-1392
Topics:
Geosciences
Permalink