Earth lab

Seismic Wave Lab

P-waves · S-waves · distance · arrival time

Learning outcomeUse wave-arrival evidence to reason about earthquake distance.

Interactive model

P-wave83.3 s

S-wave142.9 s

Station distance500 kmP-wave speed6 km/sS-wave speed3.50 km/s

P arrival83.3 s

S arrival142.9 s

Arrival gap59.5 s

t = d / v