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A magnitude 3.4 earthquake hit the Fontana area Saturday, the U.S. Geological Survey said. The Inland Empire quake was centered just under five miles northwest of Fontana, the agency said.
It was two-fifths of a mile northwest from the epicenter of a magnitude 3.4 earthquake that rumbled on June 2, and about one-quarter of a mile west of a magnitude 2.8 earthquake that struck on June 4.
LOS ANGELES (Reuters) -An earthquake of magnitude 4.7 shook the southern California city of Malibu and other parts of the Los Angeles region, the U.S. Geological Survey said on Thursday, but there ...
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 ...
For example, an eastern magnitude 4.0 earthquake typically can be felt at many locations as far as 100 km (60 mi) from where it occurred, and it might or might not cause damage near its source. An eastern magnitude 5.5 earthquake usually can be felt out to 500 km (300 mi) in most directions and can cause damage out to 40 km (25 miles).
Lasting four minutes and thirty-eight seconds, the magnitude 9.2–9.3 megathrust earthquake remains the most powerful earthquake ever recorded in North America, [2] [4] and the second most powerful earthquake ever recorded in the world since modern seismography began in 1900. [5]
Some aftershocks were reported, including a 2.8 magnitude earthquake that was centered nearby. More than an hour later, a 3.4 shook a little farther away from the city, followed by another 2.8 and ...
The Richter scale [1] (/ ˈ r ɪ k t ər /), also called the Richter magnitude scale, Richter's magnitude scale, and the Gutenberg–Richter scale, [2] is a measure of the strength of earthquakes, developed by Charles Richter in collaboration with Beno Gutenberg, and presented in Richter's landmark 1935 paper, where he called it the "magnitude scale". [3]