Earthquakes are basically sound waves (seismic waves) traveling through the earth. Because the earth is solid, it can support both “P waves” (longitudinal) and “S waves” (transverse). The P waves travel at 8000m/s, while S waves are slower, only 4500 m/s. A seismograph records the two waves from a distant earthquake. If the S wave arrives 2.0 min after the P wave, how far away was the earthquake?