You need at least 3. seismic stations provide only a circle around the station. so from geometry 3 circles intersect in a point. that is why you need 3 stations
The answer is all of the above.
The answer to your question would be D africa
hope this helps :D
Answer:
The equator
The sun's rays do not strike the Earth's surface as directly at the North Pole; they are less focused. The equator receives the most solar radiation in a year. The difference in the amount of solar energy the land receives causes the atmosphere to move the way it does.
Explanation:
