'S, or secondary, seismic waves travel fairly slowly, but these waves deep in the earth exceed 25,000 mph'
P waves (primary)
EARTHQUAKES: S, or secondary, seismic waves travel fairly slowly, but these waves deep in the earth exceed 25,000 mph
S, or secondary, seismic waves travel fairly slowly, but these waves deep in the earth exceed 25,000 mph
S, or secondary, seismic waves travel fairly slowly, but these waves deep in the earth exceed 25,000 mph
EARTHQUAKES
P waves primary
EARTHQUAKES