A magnitude 4.1 earthquake (local magnitude; USGS magnitude is 3.6) struck about 24 miles NNE of Morenci, Arizona, on Monday, Oct. 8, at 3:41 pm local time. [Right, yellow star marks epicenter. Credit, USGS]
Update, 9pm: The event above was followed by a magnitude 3.2 event and it appears there is a swarm of small earthquakes occurring, according to messages I'm getting tonight from Dr. Jeri Young, who manages the Arizona Broadband Seismic Network at AZGS. She's working on determining epicentral locations and magnitudes.
Update2, 10am, 10-10-12: There was a magnitude 3.2 event in the area at about 10:24 am, on Oct. 9.
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