What is the frequency of seismic wave?

Answer 1

From what I have studied online and heard from news reports, tsunamis happen fairly frequently, but are ususally small.

The last tsunami on par with the Indian ocean tsunami was in the 1500's. These tsunamis wiped out entire cities and villages and the wave reached about 30 meters in height.

So huge killer tsunamis happen about once every 500 years.

The average tsunami is usually more like 1-2 meters high. Still just as deadly if you are on the shore.

These smaller tsunamis happen roughly every 5 years, but they aren't always reported in the news because they don't affect enough people to be worth reporting....sad as that is to say.

Medium sized tsunamis (like the one that hit Hawaii in the 1960's) usually occur about once every 100 years. They tend to coincide with greater seismic activity and can come more frequently during one century and then fall off in frequency during another century.

So it is a good bet that a person alive today will hear about a tsunami if he or she is tapped into the right information networks.

I should emphasize that while I believe that what I am reporting here is roughly accurate, I am not an expert in oceanography and it would be wise to consult an expert.

But I think I am pretty close to the mark.

Answer 2

Seismic waves don't have specific frequencies, but there are some general patterns.

Examples:

Frequency content tends to be higher closer to the event (higher frequency signals tend to be attenuated traveling through the earth and reflecting/refracting through various layers).

Certain types of wave motion will naturally have longer periods - notably, Love and Rayleigh surface waves.

Answer 3

Lezzo