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Definitions for
"Foreshocks"
Keywords:
earthquake
,
precede
,
mainshocks
,
largest
,
series
The series of smaller earthquakes that precede a major earthquake.
wwnorton.com
Foreshocks are relatively smaller earthquakes that precede the largest earthquake in a series, which is termed the mainshock. Not all mainshocks have foreshocks.
geo.tv
Smaller earthquakes preceding the largest earthquake of a series concentrated in a restricted crystal volume.
seisinfo-india.org