According to The U.S. agency, the Mexico earthquake today was an aftershock of the quake on Apr. 18. USGS research geophysicist William Barnhart wrote in an email to The Associated Press:
"The earthquake is indeed within the Guerrero Seismic Gap. But since it is consistent with being an aftershock of the magnitude-7.2, it is neither an abnormal event, nor does it significantly reduce the remaining stored stress in the seismic gap."
The USGS added that the Guerrero Gap has the potential to produce a quake as strong as magnitude 8.4.
Mexico earthquake today is reported a normal occurrence in Mexico City. The city is vulnerable to distant earthquakes as it sits atop the muddy sediments of drained lake beds, and they reportedly jiggle like jelly when earthquake waves hit the area.
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