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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 according ...
USGS scientists said informal observations can be a big help in understanding earthquakes, especially in a region where they’re less common. 4.0 aftershock hit New Jersey at 6 p.m. Friday
The 7.8 magnitude earthquake and 7.5 magnitude aftershock flattened buildings, killing and injuring thousands. ‘Like the apocalypse’: Videos show devastation after huge earthquakes in Turkey ...
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 according ...
Foreshock activity has been detected for about 40% of all moderate to large earthquakes, [2] and about 70% for events of M>7.0. [3] 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.
An agricultural community in Imperial County experienced a 4.8 earthquake and more than 180 smaller aftershocks. A midnight 4.8 earthquake followed by a cluster of aftershocks rocks the El Centro area
The earthquake was caused by a strike-slip motion. The earthquake and the largest aftershock (magnitude 8.2, at 10:43 UTC on 11 April) had a fault displacement of 21.3 m (70 ft). [12] The strike-slip nature of the earthquake meant that the movement displaced relatively little seawater and was less likely to cause a tsunami. [13]
An earthquake rattled the northeastern U.S. on Friday. ... The USGS reported the aftershock, felt just after 6 p.m. ET, was 4.0 magnitude and centered near Gladstone, N.J.