aftershock

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Related to Aftershocks: earthquake, tsunami

aftershock

A small seismic event that follows a prior larger earthquake. When the aftershock proves to be bigger than the preceding event, then the former is re-labelled foreshock and the latter an earthquake.

Aftershock

Geomedicine A mini-earthquake that follows the largest shock of an earthquake sequence, which falls within 1–2 fault-lengths distance from the main shock; aftershocks and can continue for weeks, months, or years. See Earthquake. Cf Foreshocks.
References in periodicals archive ?
The focal mechanism solution for the mainshocks and the largest aftershocks for both sequences (1993 and 1995, Figure 5) included the flowing:
The same aftershock knocked down most of the clock tower in the town of Finale Emilia, injuring a firefighter and leaving only half the clock affixed.
New Zealand's Geological and Nuclear Sciences Institute warned the latest series of tremors could produce another spate of powerful aftershocks in the forthcoming weeks.
Workers struggling to bring the plant under control were evacuated soon after the aftershock struck, shortly before midnight.
The 60-year-old president and his ministers quickly took their oaths, and the audience of 2,000 headed for the exits and the hills, joining an evacuation called out of concern that the aftershocks would set off another tsunami.
6-magnitude aftershock was centred 85 miles north of Islamabad, near the epicentre of Saturday's 7.
The model looks at known aftershock behavior, fault lines and historical shaking patterns, then determines the probability that a quake will spawn strong aftershocks or trigger another quake on a nearby fault line.
Lukito, an analyst at the Jakarta-based Meteorological and Geophysics Agency, told Kyodo News that the aftershock occurred at 1:25 p.
About 350 aftershocks were recorded in the two days after the initial jolt, which triggered landslides, knocked homes off their foundations and derailed a superexpress 'bullet' train.
STOP Looking at the negatives and start looking at the positives of a real estate market which gave up little ground during the two years in which the New York metro market experienced 9/11, rising unemployment, the aftershocks of a stock market bubble, a national recession, and two foreign wars.
The sharp tremor - which was centred in the quake-hit town of Izmit and could be felt in Istanbul, 50 miles away - came at 11:11 am (0911 BST), after a series of smaller aftershocks had rattled the quake zone overnight.
6 earthquake and subsequent aftershocks, GTE California's network continues to function properly, with calling remaining largely intact for GTE's 3.