USGS slams study's claim of 99.9% chance of large L.A. earthquake, Los Angeles Times
"The U.S. Geological Survey is raising serious doubts about a recent study that calculates a 99.9% chance of a large earthquake in the Los Angeles area in the next three years. The USGS took the rare step of issuing a statement raising questions about the study, recently published in the journal Earth and Space Science and coauthored by a research scientist at NASA's Jet Propulsion Laboratory in La Caada Flintridge. "I have serious doubts that the conclusions of the paper are supported by the analysis that's presented there," Robert Graves, a USGS seismologist and Southern California coordinator for earthquake hazards, said in an interview Tuesday. The study lists Graves as a consultant who helped with calculations for the study, but Graves says he has deep concerns about the study."
"A new NASA-led analysis of a moderate magnitude 5.1 earthquake that shook Greater Los Angeles in 2014 finds that the earthquake deformed Earth's crust across a broad region encompassing the northern Los Angeles Basin and northern Orange County. The shallow ground movements observed from this earthquake likely reflect strain accumulated on deeper faults, which remain locked and may be capable of producing future earthquakes."