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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.
Learn how aftershocks are caused by the stresses and fractures of earthquakes and how they differ from the main shocks. Find out how long aftershocks last and how they affect rescue and recovery efforts.
Aftershock is a lower-magnitude earthquake that follows the main shock of a larger earthquake. Learn how aftershocks occur, how they decay over time, and some notable aftershocks that caused significant damage and casualties.
Learn how to forecast the number and magnitude of aftershocks following a large earthquake, and how to find the forecast for a specific event. The forecast is based on a statistical model of past aftershock sequences and updated regularly.
Learn how foreshocks and aftershocks are related to earthquakes and how they differ in terms of timing, size, and location. Find out more about the causes, effects, and examples of earthquakes and their associated phenomena.
Jul 30, 2022 · A magnitude 7.0 earthquake hit Abra on July 27, 2022, and triggered 1,375 aftershocks, including a magnitude 4.0 quake on July 30. Phivolcs warned that aftershocks may occur for several days or months and advised the public to be vigilant.
Apr 5, 2024 · Aftershocks are small earthquakes that occur after a mainshock, and are not to be confused with foreshocks or swarms. Learn how to identify, prepare and stay safe during and after an earthquake, and how to distinguish between different types of seismic activity.
