Records of past earthquakes on the same fault — including a powerful one (possibly as strong as magnitude 8.4) that shook Kathmandu in 1934 — indicate that ruptures have previously reached the surface. (sciencedaily.com)
Simons et al. (p. 1421, published online 19 May) used land - based GPS receivers and tsunami gauge measurements to model the kinematics and extent of the earthquake, comparing it to past earthquakes in Japan and elsewhere. (science.sciencemag.org)
According to his analysis, the stresses caused by past earthquakes at Cushing are just 3 - 5 percent of what the tanks normally handle just from holding oil. (insidescience.org)