Blog Post Image: New Explanation for Slow Earthquakes on San Andreas

For nearly two decades, geologists have accepted and relied upon mechanical model “A” to explain the geologic source of fault creep. It was widely believed that creep events observed on San Andreas fault were from the conditionally stable zone in Model A, however, the new study shows that they come from a much shallower source embedded within the uppermost “stable” layer. (Illustration by Jack Cook, Woods Hole Oceanographic Institution)