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Geophysical Research Letters
Article . 2016 . Peer-reviewed
License: Wiley Online Library User Agreement
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Stress drop estimates and hypocenter relocations of induced seismicity near Crooked Lake, Alberta

Authors: Fiona Clerc; Rebecca M. Harrington; Yajing Liu; Yu Jeffrey Gu;

Stress drop estimates and hypocenter relocations of induced seismicity near Crooked Lake, Alberta

Abstract

AbstractWe use a sequence of induced earthquakes near Crooked Lake, Alberta, to investigate the physical differences between induced and tectonic earthquakes. Starting with the Natural Resources Canada earthquake catalogue, we use a spectral ratio method to calculate the static stress drops of a group of relocated earthquakes ranging from December 2013 to June 2015. We find that stress drops fall within the high side of the typical reported range of tectonic events and show no correlation with earthquake magnitude, depth, or distance from the well. The stress drops appear roughly constant for events with Mw 3 to 4. Relocated hypocenters cluster both spatially and temporally around corresponding injection wells and appear to migrate deeper with increasing time from injection. Fine‐scale lineations apparent in relocated hypocenters could indicate the presence and orientation of fault planes, consistent with the published focal mechanism solutions of M 4+ events in the area.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
60
Top 10%
Top 10%
Top 1%
gold