[SOLVED] Distance To Center of Earthquake? 1. The problem statement, all variables and given/known data An earthquake releases two types of traveling waves, called "traverse" and "longitudinal." The average speed of traverse and longitudinal seismic waves in rock are 8.9 km/s and 5.1 km/s respectively. A seismograph records the arrival of the traverse waves 73 s before that of the longitudinal waves. Assuming that the waves travel in straight lines, how far away is the center of the earthquake from the seismograph? 2. Relevant equations 3. The attempt at a solution I only know that (73 s * 5.1 km/s) gives me part of the distance from the seismograph to the earthquake.