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New geological study shows fault lines meeting under SLC
Two active fault lines appear to connect under downtown Salt Lake City, according to a newly-published geological study.
and last updated 2021-06-14 19:49:31-04
SALT LAKE CITY, Utah â Two active fault lines appear to connect under downtown Salt Lake City, according to a newly published geological study.
Scientists believe they have the potential to cause more damage than previously thought. Utah is believed to have a 50 percent risk of a large, damaging earthquake along the Wasatch Fault in 50 years.
âItâs been an outstanding question in the world of earthquakes: What happens when one fault ends and another one begins?â Boise State Universityâs Lee Liberty said during an interview with FOX 13 News.
Boise State News June 9, 2021
An excerpt from the study’s abstract reads: “Although the Wasatch fault is currently known to have a high‐seismic hazard from motion along range‐bounding faults, new seismic data reveal faulted and folded 13,000–30,000‐yr‐old Lake Bonneville strata beneath Salt Lake City (SLC). Coupled with previous excavation trench, borehole, and other geologic and geophysical observations, we conclude that a zone of latest Pleistocene and/or Holocene faulting and folding kinematically links the East Bench and Warm Springs faults through a 3 km wide relay structure and transfer zone.”
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IMAGE: Sensors for an active seismic source experiment are contained in a firehose as the researchers drive through downtown Salt Lake City, Utah. view more
Credit: Lee Liberty
A complex zone of folding and faulting that links two faults underneath downtown Salt Lake City could deform the ground during a large earthquake, according to a new study.
The findings, published in the open-access journal
The Seismic Record, suggest that earthquakes magnitude 5.0 and larger could cause ground displacement and liquefaction in Salt Lake City that increase the risk of earthquake-related building damage.
As part of the Wasatch Fault Zone, the region has a complex seismic history, with at least 24 large earthquakes occurring in the urbanized parts of the zone over the past 7000 years. Along with previous excavation, borehole and other geophysical studies, the new research also supports the possibility of through-going ruptures across multiple faults in the Wasatch Fau
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