Set against this backdrop, they estimate that the net chance of a large San Andreas earthquake in the next 12 months is 1.15 percent. Ground shaking is the most powerful predictor of damage from an earthquake. Here are eight things to know about these seismic events. Where Will the Next Big Earthquake Hit? Earthquake experts say current building codes don’t reflect the Seattle area’s riskiest features — but the outlook could improve if the Really Big One can wait. The U.S. Geological Survey (USGS) National Seismic Hazard Map shows the strength of ground shaking that has a 1 in 50 chance of being exceeded in a particular place in the lower 48 states over a period of 50 years. The odds that Southern California will experience another earthquake of magnitude 7 or greater in the next week are now nearly 11%, according to preliminary estimates from seismologists. 2020-11-07 12:23:12 UTC 40.3 km. 7.0 15 km NNE of Néon Karlovásion, Greece. Sometimes an earthquake may be initially reported with either M L or M c magnitude types, before being later updated to M w.In addition, an earthquake magnitude of the same type is sometimes revised later after more data become available or the data are re-analyzed more thoroughly. The government’s Japan Earthquake Forecast Map predicts the probability of temblors on an intensity scale of lower 6 or above occurring throughout the country within the next 30 years. These maps are used in determining building seismic codes, insurance rates, and other Geophysicists at NASA's Jet Propulsion Lab are predicting an earthquake in the Los Angeles area within the next three years that would measure 5.0 or higher. We’ve spent months interviewing seismologists, engineers, tenant rights advocates, first responders and others about what is known, and what you can do. Search and rescue team work among the debris of houses after a powerful earthquake hits Katmandu, Nepal on April 26, 2015. 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