Question

Identify the type of seismic wave traveling through Earth’s crust that was the fi rst to arrive at earthquake recording stations located in Japan. [1]

Answer 1

the type of seismic wave that first toa rrive at earthquake recording stations would be : primary waves
Primary waves travel faster compared to the other type of seismic waves, with the speed of 1450 m/s in water and 5000 m/s in granite

Answer 2

The type of seismic wave traveling through Earth’s crust that was the first to arrive at earthquake recording stations located in Japan is the primary wave. The first kind of body wave is the P wave or primary wave. This is the fastest kind of seismic wave, and, consequently, the first to 'arrive' at a seismic station.