TY  - JOUR
PY  - 2012//
TI  - Modeling the generation of infrasound from earthquakes
JO  - Journal of the Acoustical Society of America
A1  - Arrowsmith, Stephen J.
A1  - Burlacu, Relu
A1  - Pankow, Kristine
A1  - Stump, Brian
A1  - Stead, Richard
A1  - Whitaker, Rod
A1  - Hayward, Chris
SP  - 2047
EP  - 2047
VL  - 132
IS  - 3
N2  - Earthquakes can generate complex seismo-acoustic wavefields, consisting of seismic waves, epicenter-coupled infrasound, and secondary infrasound. We report on the development of a numerical seismo-acoustic model for the generation of infrasound from earthquakes. We model the generation of seismic waves using a 3D finite difference algorithm that accounts for the earthquake moment tensor, source time function, depth, and local geology. The resultant acceleration-time histories (on a 2D grid at the surface) provide the initial conditions for modeling the near-field infrasonic pressure wave using the Rayleigh integral. Finally, we propagate the near-field source pressure through the Ground-to-Space atmospheric model using a time-domain parabolic equation technique. The modeling is applied to an earthquake of MW 4.6, that occurred on January 3, 2011 in Circleville, Utah; the ensuing predictions are in good agreement with observations made at the Utah network of infrasonic arrays, which are unique and indicate that the signals recorded at 6 arrays are from the epicentral region. These results suggest that measured infrasound from the Circleville earthquake is consistent with the generation of infrasound from body waves in the epicentral region.<p />  <p>Language: en</p>
LA  - en
SN  - 0001-4966
UR  - http://dx.doi.org/10.1121/1.4755526
ID  - ref1
ER  -