Modeling 3-D wave propagation and finite slip for the 1998 Balleny Islands earthquake
Article first published online: 4 MAR 2009
Copyright 2009 by the American Geophysical Union.
Journal of Geophysical Research: Solid Earth (1978–2012)
Volume 114, Issue B3, March 2009
How to Cite
2009), Modeling 3-D wave propagation and finite slip for the 1998 Balleny Islands earthquake, J. Geophys. Res., 114, B03301, doi:10.1029/2008JB005975., , and (
- Issue published online: 4 MAR 2009
- Article first published online: 4 MAR 2009
- Manuscript Accepted: 11 DEC 2008
- Manuscript Revised: 22 NOV 2008
- Manuscript Received: 31 JUL 2008
- Balleny Islands;
- source modeling
 We simulate surface waves in a 3-D Earth model using a spectral element method for existing kinematic source models of the MW 8.1, 25 March 1998 Balleny Islands earthquake. The 3-D model incorporates lateral variations in the crust and mantle on the basis of models Crust2.0 and S20RTS. Our objective is to investigate the fit of the observed and simulated long-period surface waves in the hope of improving on the existing source models. We modify a body wave model determined by Henry et al. (2000) to improve the fit of long-period surface waveforms. We demonstrate that adding a smooth component of slip extending over a fault that connects the two subevents determined by Henry et al. (2000), without invoking slip on multiple fault planes or on unconnected fault patches, provides reasonable fits to long-period surface waves as well as body waves.