who needs shills with all the idiots posting here now?
earthquakes produce several types of waves that travel through the earth's crust. these propagate at different velocities, and the wave action is different.
seismographs are placed around the country, and around the world. the delta in arrival times coupled with the magnitude at each location helps the USGS, and other scientists triangulate and pinpoint the location and magnitude. fkn ijots @ qresearch think that waves traveling through the earth's crust post eq is somehow notable. and why so much focus on a single event? cuz it's in the same hemisphere as a Q pic from the South Pole.
amazing how anons become instant experts on each and every happening.
couple of links for our budding seismic experts:
https://earthquake.usgs.gov/earthquakes/
http://www.geo.mtu.edu/UPSeis/waves.html
plz, go learn a lil bit before shitting up the bread.