What is a seismograph used for?
Correct answer: Recording earthquakes
Sarah
The movie Tremors!
zeek the flavor freak
They use seismograph for Oil & Gas exploration also.
hi
Dorothy , laugh, in the early 80s I did one of the first digitised maps of the San Andreas fault area. I had to tone down the height by 30 percent.
Dorothy
In San Francisco there's a many earthquakes so came to know about that.