What is the longest amount of time that might occur between earthquake occurrence and arrival of the first earthquake waves at a seismograph?

Several minutes

Explanation:

It takes several minutes after the occurrence of an earthquake for the first earthquake waves to appear on a seismograph. These waves are recorded as body waves (P and S waves). the P waves are fast moving and are recorded first on the seismograph. The distance of the seismic recording center is determined by the time it takes the first P and S waves to show up, which is typically several minutes.

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