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- W4384207364 abstract "Abstract Swarms in Central Utah are situated in the complex transition between the Basin and Range (BR) province and the Colorado Plateau. Transecting transverse structures, volcanic deposits, and hydrothermal systems complicate the extensional BR horst and graben structures and provide a multitude of plausible triggering mechanisms. Revisiting the catalog of the University of Utah Seismograph Stations (1981–2022), we analyze spatio‐temporal patterns and characteristic features of seismic sequences. Swarms with alternating seismicity rates, bursts, and longer swarms with persistent moment release exhibit a remarkable diversity in temporal evolution. Swarm durations do not scale with cumulative seismic moment: swarms lasting less than 1 day can have similar cumulative seismic moments as month‐long swarms. We observe stationary swarms re‐occurring for years (e.g., Mineral Mountains), as well as singular swarms in low‐seismicity areas (e.g., activating a local structure in Milford, 2021). The swarms show a pronounced heterogeneity in triggering and driving mechanisms, observed in the detailed analysis of exemplary sequences (detections, relocations, moment tensors, waveform‐based clustering, and repeater analysis). The 2022 Sevier Valley sequence activated a BR‐related normal fault, the first resolved fault plane in the valley since 1983. The 2011 Circleville sequence is interpreted as a swarm triggered by mainshock‐aftershock activity characterized by increasing magnitudes, changing rupture mechanisms, and a concentration of highly similar events in the second part of the sequence. By jointly discussing exemplary sequences and catalog statistics, we draw a comprehensive picture of swarm activity and its relation to geothermal and tectonic activity." @default.
- W4384207364 created "2023-07-14" @default.
- W4384207364 creator A5078839913 @default.
- W4384207364 creator A5090877683 @default.
- W4384207364 date "2023-07-01" @default.
- W4384207364 modified "2023-09-26" @default.
- W4384207364 title "Small‐Magnitude Seismic Swarms in Central Utah (US): Interactions of Regional Tectonics, Local Structures and Hydrothermal Systems" @default.
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- W4384207364 doi "https://doi.org/10.1029/2023gc010867" @default.
- W4384207364 hasPublicationYear "2023" @default.
- W4384207364 type Work @default.