About this Event
Geotopics on Sep 11
Speaker: Dr. Matthew M. Haney
Topic: Locating volcanic earthquakes in Alaska with an improved Bancroft algorithm
Abstract:
Determining the location of an earthquake is one of the most fundamental problems in seismology. At volcano observatories, near real-time catalogs of earthquakes are a critical data stream that often give some of the earliest indications of impending volcanic unrest. In this talk, I review types of volcanic earthquakes in Alaska and various methods used at the Alaska Volcano Observatory (AVO) for locating volcanic seismicity. I introduce a new method for locating earthquakes based on the Bancroft algorithm, which was originally developed for processing GPS data. Whereas the original Bancroft algorithm can be used to locate earthquakes with either of the two types of seismic body waves (P- or S-waves), I generalize the method so that both wave types can be used simultaneously (P- and S-waves). I apply the new technique to earthquakes in the Katmai volcanic region of Alaska during a recent and ongoing period of unrest.
Looking forward to your participation!
https://miami.zoom.us/j/92787819048?pwd=cEJrNWJjcFR5NUt5ckNCOU8xanVmQT09
Meeting ID: 927 8781 9048
Passcode: 430695
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