Area earthquake probabilities – Conducted by scientific and engineering community – Does not include the West Napa Fault 63 Why Strong Shaking in Napa? Shaking Intensity Extreme Violent Severe Very Strong Strong Moderate Light Weak Fault Location West Napa Fault Sacramento Chico Sacramento Chico San Francisco San Francisco Location Map Sacramento Eureka … Color-codedinstrumental intensity maps are derived from empirical relationsbetween peak ground motions and Modified Mercalli intensity.This ShakeMap describes the event: West_Napa_M6.7_se,West Napa As a rapid response tool, the ShakeMap ground motion values areused for emergency response, loss estimation, assessment of damageto the lifeline and utility networks, and for providing … NAPA, CA - AUGUST 24: A worker looks at a pile of wine bottles that were thrown from the shelves at Van's Liquors following a reported 6.0 earthquake on August 24, 2014 in Napa, California. Magnitude 6.7 Earthquake on the West Napa Fault Scenario ShakeMap ShakeMap created by SCEC UseIT 2014 Interns for the Earthquake Country Alliance using the OpenSHA platform. Ground motion and intensity maps are derived from peak ground motion amplitudes recorded on seismic sensors (accelerometers), with interpolation based on both estimated amplitudes where data are lacking, and … ShakeMap is designed as a rapid response tool to portray the extent and variation of ground shaking throughout the affected region immediately following significant earthquakes.
• The actual earthquake rupture only lasted four seconds, • The valley floor is lined with soft river soils that amplify earthquake waves. Seismic simulations allow scientists to better understand the distribution of shaking and damage that can accompany earthquakes, including possible future “scenario” earthquakes. The 2000 Yountville earthquake occurred with a moment magnitude of 5 on a previously unmapped fault, about 3 miles south southwest of Yountville, California in the Mayacamas Mountain Range under Mount Veeder and about 9 miles south northwest of Napa, California. The September 3, 2000 Yountville Earthquake A magnitude (M) 5.2 earthquake occurred at 1:36 AM on September 3, 2000 in the mountains 10 miles northwest of the town of Napa, near Yountville, CA. The earthquake ruptures from its epicenter south to north, directing energy toward Napa. It occurred at 01:36 PDT on September 3.