Isolated cases of remote dynamic triggering in Canada detected using cataloged earthquakes combined with a matched-filter approach
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Abstract
Here we search for dynamically triggered earthquakes in Canada following global main shocks between 2004 and 2014 with MS > 6, depth < 100 km, and estimated peak ground velocity > 0.2 cm/s. We use the Natural Resources Canada (NRCan) earthquake catalog to calculate β statistical values in 1° × 1° bins in 10 day windows before and after the main shocks. The statistical analysis suggests that triggering may occur near Vancouver Island, along the border of the Yukon and Northwest Territories, in western Alberta, western Ontario, and the Charlevoix seismic zone. We also search for triggering in Alberta where denser seismic station coverage renders regional earthquake catalogs with lower completeness thresholds. We find remote triggering in Alberta associated with three main shocks using a matched-filter approach on continuous waveform data. The increased number of local earthquakes following the passage of main shock surface waves suggests local faults may be in a critically stressed state.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Isolated cases of remote dynamic triggering in Canada detected using cataloged earthquakes combined with a matched-filter approach |
| Series title | Geophysical Research Letters |
| DOI | 10.1002/2015GL064377 |
| Volume | 42 |
| Issue | 13 |
| Year Published | 2015 |
| Language | English |
| Publisher | American Geophysical Union |
| Contributing office(s) | Earthquake Science Center |
| Description | 10 p. |
| First page | 5187 |
| Last page | 5196 |
| Country | Canada |
| State | Alberta |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |