Right as Rain:
The Faults That Ruptured in Twin California Quakes Are Very, Very Weird, Geologists Say.
Here's where things get interesting: The 7.1-magnitude earthquake rattled a fault within the Little Lake fault zone — cracks in this spot near Ridgecrest tend to run in the northwest-southeast direction.
"The earthquake on Thursday [July 4] was more complex. And part of that smaller event happened on an unmapped fault that trends NE-SW. This is very interesting geologically, said Michele Cooke, a geoscientist at the University of Massachusetts - Amherst. "We don't have a lot of earthquakes in our record that show simultaneous slip on two perpendicular faults."