2. what does a seismologist study to determine the earthquake - hazard level for a particular area?

2. what does a seismologist study to determine the earthquake - hazard level for a particular area?
Answer
Brief Explanations:
Seismologists study geological structures like fault lines, past earthquake - activity records including frequency and magnitude, and soil and rock properties as they affect seismic wave propagation to determine earthquake - hazard levels.
Answer:
Geological structures (faults), past earthquake activity, and soil/rock properties.