Computer Science – Sound
Scientific paper
Nov 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3722305j&link_type=abstract
Geophysical Research Letters, Volume 37, Issue 22, CiteID L22305
Computer Science
Sound
Volcanology: Explosive Volcanism, Volcanology: Eruption Mechanisms And Flow Emplacement, Volcanology: Instruments And Techniques
Scientific paper
Vertical inflation of the Caliente lava dome at Santiaguito (Guatemala) occurs coincidentally with the onset of explosive eruptions and produces infrasound that is generally peaked between 0.5 and 2 Hz with amplitude of up to 5 Pa (at ˜1 km from vent). Inflation of up to ˜1 m progresses rapidly (within ˜2 s) and can encompass the entire surface of the ˜200-m-diameter dome. We use particle image velocimetry to quantify the time history of dome uplift and demonstrate that deflection of a volcano's solid surface can generate infrasound waves with amplitudes of a few Pa. The volumetric displacement history is used to model linear volumetric acoustic sources, both compact and of finite extent. Synthetic waveforms match recorded infrasound in terms of timing and frequency content. Amplitude fit is very good for a station located 3.3 km from the vent and less good for stations shielded by near vent topography.
Johnson Jeffrey B.
Lees Jonathan M.
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