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Gravity is one, volcanic activity, Mudslides, Earthquake shocks, Human modifications.
yes
The volcanic and earthquake activity in the Pacific Northwest is mainly caused by the movement of the Juan de Fuca tectonic plate being subducted beneath the North American plate. This subduction process creates pressure and friction, leading to volcanic eruptions and seismic activity in the region.
the ring of fire
A shift in the earth's crust to relieve pressure, and therefore release energy, is an earthquake.
ring of fire
Hawaii
an empty cavity or cavern due to drilling or possibly earthquake activity or volcanic activity
Michigan
a zone where volcanic activity or earthquake etc. is happening
collision of tectonic plates
A tsunami.