identify the type of seismic wave traveling through earth crust that was the first to arrive at earthquake recording stations located in japan

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

i'm sure the answer you are looking for would be

a. an ice age

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