Exam 9: Earthquakes and Earth's Interior

For every integer increase of magnitude on the Richter Scale,______ times more energy is released by the earthquake.

The term that best describes most tsunamis is ____________________.

The focus of the most destructive earthquakes is almost always ____.

The temperature range at the core-mantle boundary is estimated to be between ____.

The structural layer that the P- and S-wave low-velocity zone,in the upper part of the mantle,closely corresponds to is the ____________________.

The Modified Mercalli Scale is a quantitative measure of an earthquake's intensity.

Within which belt or zone do the majority of earthquakes occur?

What is the estimated average geothermal gradient in the mantle?

Why are there so few earthquakes within plate interiors?

The percentage of all earthquakes that occur along a plate boundary is nearly what?