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e. In seismology, an aftershock is a smaller earthquake that follows a larger earthquake, in the same area of the main shock, caused as the displaced crust adjusts to the effects of the main shock. Large earthquakes can have hundreds to thousands of instrumentally detectable aftershocks, which steadily decrease in magnitude and frequency ...
Foreshock activity has been detected for about 40% of all moderate to large earthquakes, and about 70% for events of M>7.0. They occur from a matter of minutes to days or even longer before the main shock; for example, the 2002 Sumatra earthquake is regarded as a foreshock of the 2004 Indian Ocean earthquake with a delay of more than two years between the two events.
Map of the main quake and aftershocks ( map data) On April 5, 2024, at 10:23 EDT (14:23 UTC ), a Mw 4.8 earthquake occurred in the U.S. state of New Jersey, with the epicenter in Tewksbury Township. While it was felt across the New York metropolitan area, Delaware Valley, the Washington D.C metropolitan area, and other parts of the northeastern ...
According to the Geological Survey, Friday's 4.8 magnitude earthquake was the strongest to hit New Jersey in nearly 250 years. But Scott Brandenberg, a professor of civil and environmental ...
The 4.8-magnitude earthquake that hit New Jersey on Friday has produced more than three dozen aftershocks, and experts say more could be on the way.
In the Charleston area, the findings showed that roughly 16% of the region’s modern-day quakes were likely aftershocks from the magnitude 7.0 earthquake of 1886.
An aftershock is an earthquake that occurs after a previous earthquake, the mainshock. Rapid changes of stress between rocks, and the stress from the original earthquake are the main causes of these aftershocks, [ 34 ] along with the crust around the ruptured fault plane as it adjusts to the effects of the mainshock. [ 31 ]
Aftershocks are possible in the following days, months or years after Friday's 4.8 magnitude earthquake, which was felt throughout parts of New York.