Distances from the stations to the earthquake are estimated from the difference between P and S wave arrival times: You have just figured out how far your seismograph is from the epicenter and how ...

WELL INTO VERMONT, AND DOWN PAST THE The earthquake, centered off the coast of Portsmouth, was felt hundreds of miles away from the epicenter. See this interactive map from the USGS that shows ...

This finding helps explain why the earthquake ... Scientists have deployed dozens of temporary seismometers near the ...