According to a report from the San Diego Tribune, A pair of small earthquakes occurred one second apart late Sunday on different fault systems south of the U.S.-Mexico border, producing light shaking in areas of San Diego County, according to the U.S. Geological Survey.
“That’s absolutely crazy,” said Tom Rockwell, a seismologist at San Diego State University. “It’s very random that quakes on separate faults happen at about the same time.”
The first quake was a 3.4 temblor that hit at 5:13 p.m. about 5 miles west-southwest of Tecate, Mexico and 15 miles west-southwest of Campo.
It was immediately followed by a 3.6 quake about 23 miles west-southwest of Progreso, Mexico, and 31 miles east-southeast of Campo. There was no immediate indication that shaking on the first quake triggered the second
