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microtremor
Language
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English
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Etymology
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micro-
+
tremor
Noun
edit
microtremor
(
plural
microtremors
)
(
geology
)
Any of the
continuous
background
movements
of the
Earth
's
surface
and
interior
, having a
period
of 1 to 9 seconds, not associated with any
seismic
activity