Answer:
Sometimes, yes. A few historic large regional earthquakes (>M 6)
are considered by scientists to be related to a subsequent
eruption or to some type of unrest at a nearby volcano. The
exact triggering mechanism for these historic examples is not
well understood, but the volcanic activity probably occurs in
response to a change in the local pressure surrounding the magma
reservoir system as a consequence of (1) severe ground shaking
caused by the earthquake; or (2) a change in the "strain" or
pressure in the Earth's crust in the region surrounding where
the earthquake occurred.
