Foreshocks

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Related to foreshock: tsunami, aftershock

Mini-earthquakes that often precede the largest earthquake in a series

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aftershock

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Instrumental seismicity (1965-1984) has included 284 events, 244 of them related to the 1983 sequence and centred on the Eilat deep in the northern Gulf Recent seismicity (1985-1995) has shown that seismicity in the Gulf of Aqaba has been episodic (Figure 2) An earthquake sequence in July 1993 began with foreshocks, followed by a mainshock (6 0 Md) on August 3rd 1993, and then 403 aftershocks (Md [greater than or equal to] 2.

Migration of local earthquakes in the Gulf of Aqaba, North Red Sea

The biggest foreshock at 15:05 UTC is not visible either, neither in sidereal filtered DD nor in sidereal and regional filtered PPP solutions.

Un caso de estudio para la sismologia GPS: el terremoto de Lorca

3 earthquake that turned out to be a foreshock of the massive magnitude 9.

Chile Earthquake of Magnitude 8.2: Could a Larger Quake Similar to 'Great Chilean Earthquake of 1960' Hit Area?

1 quake has a 5 percent chance of being a foreshock of an even larger quake.

Los Angeles Earthquake: After Magnitude 5.1 and Eight Aftershocks, Larger Quake Possible [Photos]

Seismologists generally say that if there's a foreshock - a smaller shaker that precedes a quake - that measures at least 5.

IF FAULT'S A-ROCKIN', KEEP A-TALKIN'; SEISMOLOGISTS DISCUSS QUAKES' UNPREDICTABILITY

Since we don't have enough data on the exact happenings inside the Earth's crust to be more precise, we must resort to working out the odds of one shock being a foreshock of a larger quake or not, based on what's happened before," she added.

One quake can trigger another

6 foreshock, followed by five smaller tremors clustered within a kilometer of the spot where the Joshua Tree quake started two hours later.

Landers earthquake provides prediction clue

NYSE:HBI) Tuesday announced it has partnered with Irvine-based Foreshock to create an interactive Web site for the company's new House2Home(TM) retail stores.

HomeBase Partners With Foreshock to Launch House2Home Web Site

FutureLink Gold partners include Wareforce, Softchoice, ePartners, Foreshock and Merisel.

FutureLink Announces New ASP Channel Partner Programs

But they may be able to offer some warning of the impending disaster if a foreshock precedes it, a trait of many, but not all, strong shocks.

California faults unleash week of turmoil

However, Jones and Duncan Agnew, a geophysicist at the University of California, San Diego, have devised a method for calculating the odds that any one earthquake represents a foreshock.

Perils of prediction: are scientists prepared to warn the public about geologic hazards?