Revised locations for earthquake swarm in northwest Arizona

The first 8 earthquakes in this week's swarm in northwest Arizona have been relocated by Dr. Jeri Young at AZGS using our local seismograph stations to improve accuracy from the USGS regional network.    The vertical white line in the figure at right is the Nevada-Arizona border.   Magnitudes of the quakes are shown in white.

The Mesquite and Grand Wash faults are shown in red.

Three more quakes occurred in the area after this figure was prepared.