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A magnitude 4.2 earthquake was felt widely across the nation's second largest city Friday and shook things off shelves near the epicenter in a small mountain community east of Los Angeles, but ...
An average of 25 earthquakes with magnitudes between 4.0 and 5.0 occur per year in California and Nevada, according to a recent three-year data sample. The earthquake occurred at a depth of 5.6 miles.
An earthquake that shook Temecula, Calif., on Friday evening was felt widely across San Diego. The magnitude-4.2 quake was reported at 6:16 p.m. about 11 miles from Temecula at a depth of 9 miles ...
The Modified Mercalli intensity scale (MM, MMI, or MCS) measures the effects of an earthquake at a given location. This is in contrast with the seismic magnitude usually reported for an earthquake. Magnitude scales measure the inherent force or strength of an earthquake – an event occurring at greater or lesser depth. (The "M w" scale is ...
Megathrust earthquakes are almost exclusive to tectonic subduction zones and are often associated with the Pacific and Indian Oceans. [5] These subduction zones are also largely responsible for the volcanic activity associated with the Pacific Ring of Fire. [12] Since these earthquakes deform the ocean floor, they often generate strong tsunami ...
USGS map showing faults that span the Pacific–North America plate boundary. The Hayward Fault Zone is a right-lateral strike-slip geologic fault zone capable of generating destructive earthquakes. The fault was first named in the Lawson Report of the 1906 San Francisco Earthquake in recognition of its involvement in the earthquake of 1868. [1]
A small earthquake rattled Northern California on Friday evening when a magnitude 4.2 temblor shook in Butte County. The quake struck at 6:41 p.m. about 5 miles southeast of the city of Oroville ...
California uses the ShakeAlert Earthquake Early Warning System to notify those in close proximity to an earthquake a few seconds before it hits. The system is managed by the U.S. Geological Survey ...