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Examination of the Rock Valley Flower Structure Effects on Earthquake Wave Propagation

Description: 

The Rock Valley Nevada’s fault structure appears to be comprised of a flower structure with many fault strands, which makes accounting for their behavior in synthetic waveform modeling difficult. Fault strands can act as natural wave guides if they are low velocity zones in comparison to surrounding higher velocity country rock, due to a fault experiencing intense fracturing, brecciation, liquid-saturation, and/or high pore-fluid pressure. Separating this behavior from other phenomenon is difficult in Rock Valley given the potential number of fault strands, so to identify the effects we utilize a variety of velocity models to account for possible behavior to see which bests replicates observed waveforms. We perform and contrast three synthetic estimations of waveforms: 1) a simple velocity model, 2) a high-resolution tomography model, and 3) a high-resolution tomography model with low velocity faults within it. For each of these models, we compare the results to the observed waveforms from a couple of selected local earthquakes to see which model accurately reproduces observed waveform phenomena. With the main objective being the investigation of the local fault structures effects on waves propagating across the faults in the Rock Valley which will help to better define the location and structure of those faults.

Session: Advancements in Forensic Seismology and Explosion Monitoring [Poster]

Type: Poster

Date: 4/17/2025

Presentation Time: 08:00 AM (local time)

Presenting Author: Colin

Student Presenter: No

Invited Presentation: 

Poster Number: 91

Authors