AE

Author(s) Date 2020-07-13

The Alberta Earthquake Dashboard is an interactive application providing near-real-time earthquake monitoring information for Alberta. The online application includes a map of all recorded earthquakes from 2006 to present day and connections to all our seismic stations where you can view the seismic wave forms of each station.

Earthquake Locations and Classification

Earthquake locations are calculated from regression of arrival times of P and S waves at seismic stations where

  • latitude and longitude are presented in decimal degrees,
  • depth is kilometers below sea level, and
  • date is the origin time of initial rupture presented in both UTC and MST/MDT with depth type either fixed by a geophysicist (g) or a free variable (f) calculated by the location program.

Earthquake Classification (etype):

  • A suspected natural earthquake (SE), if it is located outside of a subsurface order area and has not been identified as a blast, or located in a subsurface order area prior to 2012.
  • A known natural earthquake (KE), if it is above a local magnitude 3, has been assessed as not induced, and has been recorded by external agencies as well as by the AER/AGS.
  • A suspected induced earthquake (SI), if it is located in a subsurface order area after 2012, but has not been identified as known induced by a study or operators report.
  • A known induced earthquake (KI), if it is located in a subsurface area after 2012 and has been identified as such by a study or operators report.
  • Earthquakes and their classifications are subject to review and change as new information is received or as studies of specific events progress.

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