Multiple choice general knowledge

What kind of seismic wave reaches seismographs first?

  1. P waves

  2. S waves

  3. Surface waves

  4. It depends on the distances between the earthquake and the seismograph
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

P-waves (primary waves) are the fastest seismic waves and therefore reach seismographs first after an earthquake occurs. They travel through both solid and liquid materials and move in a compressional motion. The time delay between P-waves and slower S-waves helps scientists determine earthquake distance.

Keep practicing — related questions