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Very-Low-Frequency Earthquakes (VLFE) in SVI and Grid Moment-Tensor Inversion

Very-Low-Frequency Earthquakes (VLFE) in SVI and Grid Moment-Tensor Inversion. For details on GCMT inversion method, see Ito et al. , GJI, 2006. Forward Modelling of VLFE Waveforms. An Example of VLFE in May 2008 ETS Episode. Compare to A Recent Study by UW Group.

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Very-Low-Frequency Earthquakes (VLFE) in SVI and Grid Moment-Tensor Inversion

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  1. Very-Low-Frequency Earthquakes (VLFE) in SVI and Grid Moment-Tensor Inversion For details on GCMT inversion method, see Ito et al., GJI, 2006.

  2. Forward Modelling of VLFE Waveforms

  3. An Example of VLFE in May 2008 ETS Episode

  4. Compare to A Recent Study by UW Group Kao et al.(JGR, special issue) La Rocca et al.(Science, 2009)

  5. PGC Array: ~200 m Spacing

  6. Spatial-Temporal Distribution of3 A-class ETS Episodes

  7. (Near) Future Efforts • A joint study (or studies) applying various tremor location methods to the same tremor dataset to determine what waveform patterns are best resolved by which method (pros and cons) and why. • Establish a semi-permanent seismic array in southern VI for mid-/long-term ETS observations (PGC Array). • Continue VLFE CMT inversion for previous ETS episodes. • Identify ETS migration details, and their relationship w.r.t. structures. • Setting up TAMS for WA, OR, and possibly CA.

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