Detection and Location of Small Seismic Events Surrounding Yellowstone Lake, WY

Session: Leveraging Advanced Detection, Association and Source Characterization in Network Seismology [Poster]
Type: Poster
Date: 4/30/2020
Time: 08:00 AM
Room: Ballroom
Description: 

Categorization of seismicity in Yellowstone National Park is an important task for better understanding volcanic, geothermal, hydrothermal and additional thermal features on the Yellowstone Plateau. This project primarily focuses on microseismicity related to faulting and hydrothermal venting in the Yellowstone Lake region. Between 25 June 2018 and 4 August 2018, we deployed 40, 5-Hz, 3-component Nodal instruments recording continuous ground motion at 250 Hz. These instruments were concentrated in the areas north of the Flat Arm region and east of West Thumb. Nodals were deployed primarily along the shoreline of the lake with 6 being deployed on islands (Stevenson, Frank and Dot Islands). Along with these instruments, 10 Geospace GS-11D 3-component lake-bottom seismometers were deployed and sampled at 200 Hz. These lake-bottom seismometers targeted the crater due east of Stevenson Island which contains hydrothermal vents in the deepest part of the lake (~ 110 m). The overall deployment comprised 50 instruments dedicated to the detection of small seismic events that were not located by the regional seismic network in the Yellowstone Plateau volcanic field. A future deployment, scheduled for the summer of 2020, will contain additional lake-bottom seismometers that will linearly cover the span of the targeted area in the north-central region of the lake. Here we evaluate a series of event detection and location methods specifically designed for data recorded by small-aperture Nodal style arrays.

Presenting Author: Nicholas M. Forbes

Authors