Thread: TODAY - IRIS WEBINAR: Unraveling earthquake stresses: Insights from dynamically triggered earthquakes, 4/29 at 2 PM ET

Started: 2021-04-29 10:39:22
Last activity: 2021-04-29 10:39:22
Topics: Webinars
Please register for our next IRIS Webinar on *Thursday, April 29th* at* 2:00
PM Eastern *for...

*Unraveling earthquake stresses: Insights from dynamically triggered

*Presented by:* Dr. Richard Alfaro-Diaz, Postdoctoral Research Associate,
Los Alamos National Lab

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*Abstract:* Earthquake triggering has been shown to occur in a variety of
settings and with a suite of proposed mechanisms. Small earthquakes,
non-volcanic tremor, and even volcanic responses can be triggered
dynamically from the seismic wave arrivals of large earthquakes. Static
triggering results from increased stress from the fault motion of a nearby
large earthquake, and generally is the dominant form of triggering within
two fault lengths of a large earthquake. Induced earthquakes have been
triggered through wastewater injection in certain parts of the U.S. In sum,
dynamic, static, and induced seismicity result from stress changes near
triggered faults and/or volcanoes. Studying triggered earthquakes may
provide insight into the stress state of faults, the faulting process, and
magmatic responses. We explore dynamic triggering in documented regions of
induced seismicity and in geothermal areas. Specifically, we document
dynamic triggering and analyze the stress and attributes of triggering
(wave type, orientation to local stress field, peak dynamic stress) in
order to characterize dynamic triggering in these regions.
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