The earthquake swarm continues in northwest Arizona near the Nevada border. There were more than a dozen events during the past week, with the largest being a magnitude 2.7 yesterday (Sunday) just after noon. A magnitude 1.9 event just one minute later. [Right, epicenters of last weeks quakes shown by yellow dots. The orange dots are from Sunday's quakes. Credit, USGS]
The swarm began on March 28 and more than 50 earthquakes have been recorded so far. Swarms in other areas have lasted for months in some cases.
Prorokia ?cingulata (Geinitz, 1873)
6 hours ago