There are 4 fault lines in the United States.
Reverse, strike-slip, oblique, and normal faults are among the several types of faults. Faults are essentially wide rifts in the Earth's surface where the crust moves relative to one another.
The movement of the plates on either side, rather than the fracture itself, is what characterizes it as a fault. These movements demonstrate the existence of strong forces at work beneath the Earth's surface.
There are faults of every size; some have offsets of only a few meters, while others are so massive that they can be seen from space. However, the potential for earthquake magnitude is constrained by their size.
For instance, anything larger than an 8.3 magnitude earthquake is practically inconceivable due to the San Andreas fault's immensity (about 800 miles long and 10 to 12 miles deep).
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