Monday, October 29, 2012

Another quake in Morenci area swarm

A magnitude 3.4 earthquake hit just before 1a.m. this morning about 22 miles NNE of Morenci, in eastern Arizona.  This is the fourth earthquake of roughly this size plus a number of smaller ones in the area in the past three weeks.

October 8, 2012, M3.6 (ML= 4.1), 23 miles NNE of Morenci
October 9, 2010, M3.1
October 14, 2012, M2.5, 29 miles NNE of Morenci

Our seismic network manager, Dr. Jeri Young, says the only known fault in the area is the Alma Mesa fault system to the east. However, there is a strong west-east lineament near the ML 4.1 location.

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