The Operation Of Processes At Different Plate Margins

Question 1

What is the Benioff zone

Answer 1

Zone of seismicity corresponds with down going slab in a subduction zone

Question 2

What can the angle of the oceanic plate be when subducting?

Answer 2

30* to 60*

Question 3

What depth can the benioff zone extend to

Answer 3

650-700km

Question 4

Where do most earthquakes occur during subduction?

Answer 4

Within the 1000*c isotherm

Due to internal deformation and dehydration Meaning the rock is too melted to produce friction

Question 5

What does magnitude mean

Answer 5

The size or extent

I.e, the size of an earthquake

Question 6

What is the depth of a shallow earthquake

Answer 6

0-70km

Question 7

What is the depth of an intermediate earthquake

Answer 7

70-300km

Question 8

What is the depth of a deep earthquake

Answer 8

300-700km

Question 9

What is seismic gap theory

Answer 9

Over the course of a fault line seismic event must roughly average out in terms of magnitude
A quite period could mean a big earthquake will happen