The USGS reports a magnitude 2.2 earthquake at 10:21 am local time this morning, on the Arizona side of Lake Mead, near Boulder City, Nevada.
The Arizona Republic ran a story saying the USGS reported a M2.4 quake occurred 47 miles northwest of Kingman at 12:04 pm. However, that does not appear on the USGS earthquake website, and Lisa Linville at the Northern Arizona University Earthquake Information Center cautions that this event may be a man-made blast instead.
Although I'm sure the USGS has looked at all the options it would be interesting to look at a map of the fault lines in the area just to check. With all of the seismic activity lately I don't think it would be a far stretch for it to be an actual quake.
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