The epicenter of an earthquake is located 6,500 kilometers away from a seismic station. If the first S-wave arrived at this seismic station at 1:30 p.m. at what time did the first P-wave arrive at 1:22 pm. So, the correction option is B.
Epicenter is the surface part of the earth's which is directly above the focus of an earthquake compare to hypocenter sense. It can be located by estimating arcs from each three or more seismic observation with the arc radius proportional to time of travel of seismic waves from the focus of each station.
An Earthquake epicenter mostly located in the circum- pacific seismic belt was found along the rim of the pacific seasons, it was the world's greatest earthquake. It has also its nickname the ring of fire.
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