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Glossary of earthquake terms
En echelon shears crossing street, Hayward Hayward, California.
The street shows en echelon shears crossing Foothill Boulevard
in San Leandro, just to the north of Hayward. Here the shear
zone is quite narrow. (Photo from the National Geophysical Data
Center. Photo by Sue Hirschfeld.)
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Creep
Creep is slow, more
or less continuous movement occurring on faults due to ongoing
tectonic deformation. Faults that are creeping do not tend to
have large earthquakes.
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