Almost 98% of earthquakes occur at the boundary of a tectonic plates when they slide against one another. Despite this, Indiana still has seismic zones that experience increased seismic activity. This is particularly heavy in the Wabash Valley Fault zone in the
southwest comer of the state. How do you explain how seismic activity is felt in this area?
A)
The Wabash Valley Fault Zone is part of the Pacific plate boundary
B
9
The Wabash Valley Fault Zone is close to the center of the North American
Plate which is where the majority of earthquakes occur.
The Wabash Valley Fault zone is an interplate seismic zone which means
that it lies directly on the boundary of a major tectonic plate
The Wabash Valley Fault Zone is an intraplate seismic zone which means
that seismic activity is felt on the interior of a major tectonic plate
D

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