Earthquakes generate compressional waves (p-waves) and shear waves (s-waves). Compared to the speed of shear waves in a given earth material, the speed of compressional waves is the fastest.
Because of this the compressional waves are the first waves to arrive on a complete record of ground shaking. They are also called P waves, which derives from this fact - P is an abbreviation for primary, first wave to arrive.<span>They typically travel at speeds between ~1 and ~14 km/sec.</span>
Well, if you make a limestone tower and a acid rain falls onto it, the tower will dissolve and then you won't have a tower
Answer: It refers to the decline in travel time between geographical locations as a result of transportation, communication, and related technological and social innovations.
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