The availability of average elastic parameters for the lithosphere of the Scotia Sea region, and a suitable database of regional events, allows us to perform a waveform inversion to retrieve focal mechanisms and source time functions. Examples of waveform inversion are presented, for the 30/05/96 event, located in the South Sandwich Trench (Mw = 5.9), and the 15/11/1998 event, close to the South Orkney Is. (Mw = 5.5), together with some feasibility tests. Despite use of only a few seismograms from a limited number of stations, our focal mechanisms are consistent with CMT solutions. The results obtained in synthetic experiments and inverting real data are encouraging for the study of low level seismicity detected by temporary arrays in the Antarctic Peninsula and Tierra del Fuego.
Moment tensor waveform inversion in the sub-Antarctic Scotia Sea region: Feasibility tests and preliminary results
Vuan A.;Russi M.;
2001-01-01
Abstract
The availability of average elastic parameters for the lithosphere of the Scotia Sea region, and a suitable database of regional events, allows us to perform a waveform inversion to retrieve focal mechanisms and source time functions. Examples of waveform inversion are presented, for the 30/05/96 event, located in the South Sandwich Trench (Mw = 5.9), and the 15/11/1998 event, close to the South Orkney Is. (Mw = 5.5), together with some feasibility tests. Despite use of only a few seismograms from a limited number of stations, our focal mechanisms are consistent with CMT solutions. The results obtained in synthetic experiments and inverting real data are encouraging for the study of low level seismicity detected by temporary arrays in the Antarctic Peninsula and Tierra del Fuego.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
