An aftershock is a seismic event that follows a larger mainshock in the same general region and results from the continued adjustment of the crust to the stress changes induced by the main rupture. Aftershocks typically occur on or near the mainshock fault or on nearby faults perturbed by the stress redistribution. They exhibit characteristic temporal decay in frequency and magnitude, commonly described by Omori-type laws, and spatial clustering around the mainshock rupture zone. Aftershock sequences provide critical information on fault properties, stress transfer, and ongoing deformation, and are central to short-term seismic hazard assessment following major earthquakes.
A magnitude 7.7 earthquake jolted Panama on Friday, setting off panic in the capital city and warnings of dangerous tsunami waves.
Environment
Oct 10, 2026
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A powerful magnitude 7.7 earthquake struck off the coast of Indonesia early Saturday, damaging buildings and homes, and triggering a tsunami warning. Authorities urged people on affected coastlines to move to higher ground.
Environment
Aug 15, 2026
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A powerful 7.4 magnitude earthquake struck western Colombia on Monday, killing at least 111 people, damaging hundreds of buildings and leaving many trapped under debris while their loved ones and rescue workers searched through ...
Environment
Aug 11, 2026
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A 7.1 magnitude earthquake shook Japan 's southern main island of Kyushu on Tuesday, leaving dozens of people injured or missing after part of a shopping center and a huge chimney at a paper factory collapsed, officials said. ...
Environment
Jul 28, 2026
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Flash flooding has been tearing up communities across the U.S., with heavy downpours sending creeks and rivers rushing over their banks from Texas to Kentucky, across the Midwest and into the Mid-Atlantic states and the Northeast. ...
Environment
Jul 13, 2026
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Earthquakes still arrive without warning. That is the hard truth scientists have been forced to accept, despite a decade of advances in artificial intelligence, satellite monitoring and dense seismic networks.
Earth Sciences
Jul 1, 2026
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The two powerful earthquakes that struck Venezuela's northern coast, killing more than 180 people, were an event known as a "doublet."
Earth Sciences
Jun 25, 2026
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On Wednesday evening just after 6 p.m. local time, two earthquakes violently shook northern Venezuela.
Earth Sciences
Jun 25, 2026
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In 2011, Japan reeled from the effects of a devastating magnitude 9.0 earthquake. But unnoticed in the chaos resulting from the quake, its major aftershocks and the tsunami it caused, something strange happened. About 16 ...
Earth Sciences
Jun 19, 2026
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Arsenio Butil Jr. fell to his knees and began to pray when last week's deadly 7.8-magnitude earthquake began shaking his home on the coast of the southern Philippines.
Environment
Jun 19, 2026
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