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where do most earthquakes occur?




what major type of fault occurs at a) transform, b) Convergent, and c) divergent plate motions?





what is the direct case of earthquakes?

what is the difference between a seismogram and a siesmograph?



what was the purpose of using a SP time method?

SP time method:
three circles are drwan on a seismograph. The first one is drawn around the S________ S________. The radius of this equals the distance from the seismorgraph to the ________.

SP time method:
the second circle is drawn around another Seismograpph station, and ______ the first cicle in ______ spots.

SP time method
the third circle is drawn around a thrid seimograph station , all three circles intersectin ______ spot  the ______.

what is the Richter Magnitude Scale?



What is the earthquake hazard?

what is the difference between strength and frequency of an earthquake?

what magnitude would describe the greatest frequency?

what is the gap hypothesis?


retrofitting is the process of making buildings more earthquake resistant. Describe the five techniques built in buildings today.

What is the difference between the Richter Magnitude scale and the Mercalli scale?

