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 powerful 7.5 magnitude earthquake struck off northern Japan late Monday, injuring 23 people and triggering a tsunami in Pacific coast communities, officials said. Authorities warned of possible aftershocks and an increased ...
Environment
Dec 9, 2025
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Earthquake forecasting tools powered by AI can forecast the risk of aftershocks seconds after the initial tremor, a new study suggests. The machine learning models can forecast where, and how many, aftershocks will take place ...
Earth Sciences
Nov 24, 2025
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Earthquakes often bring to mind images of destruction, of the Earth breaking open and altering landscapes. But after an earthquake, the area around it undergoes a period of post-seismic deformation, where areas that didn't ...
Earth Sciences
Oct 15, 2025
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Two powerful offshore earthquakes struck the same region in the southern Philippines hours apart on Friday with the first 7.4 magnitude temblor killing at least seven people, setting off landslides and prompting evacuations ...
Environment
Oct 10, 2025
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An offshore earthquake of magnitude 6.9 collapsed walls of houses and buildings late Tuesday in a central Philippine province, killing at least 31 people, injuring many others and sending residents scrambling out of homes ...
Environment
Oct 1, 2025
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The magnitude 7.7 earthquake in Myanmar on 28 March 2025 caused widespread damage and over 3,800 fatalities, and also resulted in strong shaking and a building collapse in Bangkok, more than 1,000 km away. Preliminary analysis ...
Earth Sciences
Aug 15, 2025
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What could the next mega-earthquake on California's notorious San Andreas fault look like?
Earth Sciences
Aug 12, 2025
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On March 28, 2025, a major earthquake with a moment magnitude (Mw) of 7.7 struck Mandalay, central Myanmar (referred to as the 2025 Myanmar earthquake). This event caused severe shaking and substantial damage in Myanmar and ...
Earth Sciences
Jul 3, 2025
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Hours after a 6.2 magnitude earthquake shook Turkey's biggest city, sending panicked residents racing onto the streets, Istanbul remained on edge late Wednesday as a string of aftershocks continued to rattle nerves.
Environment
Apr 23, 2025
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The 28 March magnitude 7.7 Mandalay, Burma (Myanmar) earthquake caused widespread and severe damage in Myanmar and neighboring countries such as Thailand, with more than 5,000 casualties now confirmed. At the Seismological ...
Earth Sciences
Apr 15, 2025
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