Publication Date:
2016-04-15
Description:
Comparison of observed and synthetic radiation patterns suggests that Love waves generated by the 2007 Crandall Canyon Mine collapse ( M w 4.1) are the result of shear waves generated by a relatively large compensated linear vector dipole component at the source, whereas the Love waves associated with a 2013 Rudna Mine collapse ( M w 4.2) are minimal except where amplified by a deep sedimentary basin. We examine the source of the 19 March 2013 Rudna Mine, Poland, collapse with a full moment tensor inversion method, using the complete waveforms of regional-distance seismic data. The computed source is primarily composed of a dominant, and statistically significant, implosive component. The Rudna source is more similar to previous mine collapses than to double-couple tectonic earthquakes. Although source mechanisms are similar, there are clear differences in Love-wave amplitudes. Online Material: Tables of velocity models and figures of moment tensors and waveform fits.
Print ISSN:
0037-1106
Electronic ISSN:
1943-3573
Topics:
Geosciences
,
Physics