Mammoth, WY – A second, weaker earthquake struck near Mammoth, Wyoming, on Tuesday following a stronger tremor earlier in the day, according to the University of Utah Seismograph Stations.
The first quake, recorded at 1:22 p.m. UTC (7:22 a.m. local time), measured magnitude 3.7 and occurred about 22 kilometers south-southwest of Mammoth at a depth of 7.2 kilometers. A subsequent 2.5-magnitude quake hit the same general area roughly two hours later, at 15:11 UTC (9:11 a.m. local time), with a depth of 5.2 kilometers.
Both events were reviewed by seismologists at the University of Utah, which monitors seismic activity across the Yellowstone region. The second quake is considered a smaller aftershock of the earlier, stronger tremor.
Preliminary data show that the initial 3.7 quake was felt lightly by residents and park visitors, though there have been no reports of injuries or damage. Yellowstone National Park and surrounding areas experience frequent minor quakes, often clustering in short-lived swarms due to the region’s active geothermal and tectonic system.
Experts note that these earthquakes are typical for the area and not indicative of unusual volcanic activity, though monitoring continues for any changes in ground deformation or thermal features.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
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