New Cosmogenic and VML Dates and Revised Emplacement History of the Ice Springs Volcanic Field in the Black Rock Desert, Utah

Patzkowsky, Samuel; Randall, E. J.; Rosen, Madison; Thompson, Addison; Moua, Pa Nhia; Schantz, Krysden; Pollock, Meagen; Judge, Shelley; Williams, M. Y.; Matesich, Cam

doi:10.18277/akrsg.2019.31.02

Cited by 1 publication

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“…Volcanism began in the late Miocene, but has been most active since ca. 2.5 Ma (Johnsen et al., 2010; Oviatt, 1991; Stahl et al., 2019) and the youngest eruptions occurred 9–12 ka years ago (Patzkowsky et al., 2017) significantly older than the 600 years (Valastro et al., 1972), which is commonly reported. In addition to volcanism, it is possible that a low angle normal fault is located beneath the Sevier Desert (Allmendinger, 1983; Coogan & DeCelles, 1996; Yuan et al., 2018).…”

Section: Introductionmentioning

confidence: 98%

Unusual Seismic Signals in the Sevier Desert, Utah Possibly Related to the Black Rock Volcanic Field

Mesimeri

Pankow

Barnhart

et al. 2021

Geophysical Research Letters

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On September 12, 2018 and April 14, 2019 shallow (<2.5 km from the surface, <1 km relative to sea level) earthquakes (Mw 4.0 and 4.1, respectively) struck a relatively aseismic area in south‐central Utah, within the Black Rock Desert volcanic field. Seismic waveforms are dominated by long‐period energy, no clear direct S‐wave arrivals, and signal durations of ∼100 s. Using co‐seismic interferograms, we detect clear and distinguishable surface deformation confirming the shallowness of the two mainshocks, while full moment tensor solutions rule out an isotropic source, such as an explosion or collapse. For the April 2019 sequence, we build an earthquake catalog using a dense temporary geophone array. The enhanced earthquake catalog shows a rapidly decaying aftershock sequence, with 85% of aftershocks occurring during the first three hours. Combining these observations, we argue that these earthquake sequences are related to the Black Rock Desert volcanic field.

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