Consider the following statements:
1. In a seismograph, P waves are recorded earlier than S waves.
2. In P waves, the individual particles vibrate to and fro in the direction of wave propagation whereas in S waves, the particles vibrate up and down at right angles to the direction of wave propagation.

Which of the statements given above is/are correct?

Correct Option: Both 1 and 2

Both statements are correct. Primary waves (P-waves) are longitudinal waves where particles vibrate back and forth parallel to the direction of wave propagation, and being the fastest seismic waves, they are recorded first on a seismograph. Secondary waves (S-waves) are transverse waves where particles vibrate up and down at right angles to the direction of wave propagation and arrive after P-waves.