Sagot :
Answer:
To understand the risk that different areas of the U.S. face for earthquake hazards,
we need to know where faults are and how they behave.
We know a fault exists only if it has produced an earthquake or it has left a recognizable mark on the earth's surface.
i hope it helps UwU
#CarryOnLearning
Answer:
To know what exactly happening in our place, to give warnings to everyone.
Explanation:
Earthquake is dangerous, we need to observe in our surroundings.