Other
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..229h&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 3, p. 229-232.
Other
2
Compressible Fluids, Magma, One Dimensional Flow, Tremors, Viscous Fluids, Volcanoes, Barriers, Half Spaces
Scientific paper
We present a 1D flow model in which compressible viscous fluid runs through the dike-like conduit with a barrier. The barrier is assumed to open or close above or under a certain threshold pressure, respectively. Constant flow rate at one end and a constant pressure at the other end are set as boundary conditions, which mimicks the fluid flow from a reservoir to an open space. For a set of parameters plausible for the magma flow in cracks, the system oscillates periodically even in the existence of viscous damping. Spectra of the far-field displacement excited by the stress due to this oscillation show a prominent frequency peak in each case. The time interval during which the barrier is kept open becomes longer, as the flow rate increases. This results in the elongation of peak period expected in the spectra of far-field displacement. This model may have an important implication for volcanic tremors whose dominant frequency and continuation time change temporarily.
Honda Satoru
Yomogida Kiyoshi
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