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foreshock
[ fawr-shok, fohr- ]
noun
Geology.
- a relatively small earthquake that precedes a greater one by a few days or weeks and originates at or near the focus of the larger earthquake.
foreshock
/ ˈ´ÚÉ”Ëˌʃɒ°ì /
noun
- a relatively small earthquake heralding the arrival of a much larger one. Some large earthquakes are preceded by a series of foreshocks Compare aftershock
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˜yÐÄvlog History and Origins
Origin of foreshock1
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Example Sentences
Examples have not been reviewed.
Experts also do not know whether this chain of quakes are foreshocks leading up to a large earthquake or their own event.
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Indeed, only about 5% of earthquakes are "foreshocks", say Bradley and Hubbard.
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As with all earthquakes, there is 1 in 20 chance that Tuesday’s temblor was a foreshock to a larger earthquake.
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A foreshock to Thursday’s quakes occurred Wednesday, at 1:46 p.m.
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It’s simply impossible to know whether small earthquakes are “foreshocks†to a larger quake before the more powerful event strikes.
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