Pwaves
arrive first
s waves
arrive then
displacement
earthquake generates sound 1
waves in earth. unlike in a
gas, there are both z
longitudinal (p) and
transverse (s) sound waves in
solid. typically, the speed of s
waves is about 4.5 km/s and
that of p-waves 8.2 km/s. a
seismograph records p& s waves from an earthquake. the first p
waves arrive 3 minute before the first s waves. how far away did
the earthquake occur?
ans: 1795 km