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CATEGORIES:Webinars
SUMMARY:Fault and Groundwater Exploration Using Vp/Vs Ratios, Guided Waves, and Other Seismic Methods
DESCRIPTION:
Fault and Groun
dwater Exploration Using Vp/Vs Ratios, Guided Waves, and Other Seismic Meth
ods
Join us for a webinar on June 8, 2021 at 2:00 PM EDT.
Speaker
: Rufus D. Catchings, Research Geophysicist, Earthqua
ke Science Center
Locating
near-surface faults can be challenging, particularly for blind faults in a
reas with high erosional/sedimentation rates or in highly urbanized setting
s, where urbanization can obscure geomorphic evidence of the faults. Yet, a
ctive blind faults can represent major hazards to large populations and/or
critical facilities, such as buildings, bridges, and pipelines. Active-sou
rce seismic methods, including tomographic Vp/Vs ratio imaging, PGV of guid
ed-waves evaluation, surface-wave analysis, reflection imaging, and combine
d seismic methods, can be used to identify, explore, and laterally trace ne
ar-surface faults and their effects on near-surface features, such as groun
d water. I present examples of active-source seismic fault exploration and
evaluation of multiple fault zones, including parts of the San Andreas, Wes
t Napa, Raymond, Hollywood, and Ridgecrest faults in California and the HZG
LY fault in Beijing, China. Various combinations of these techniques can be
applied in most terrestrial fault zones worldwide, and the resulting infor
mation can be useful in mitigating earthquake hazards.
DTSTAMP:20240329T112955
DTSTART;TZID=America/New_York:20210608T140000
DTEND;TZID=America/New_York:20210608T150000
SEQUENCE:0
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