Author Question: What happens when the earthquake wave period equals the natural period of vibration of a building or ... (Read 87 times)

RRMR · **on:** Jul 15, 2018

What happens when the earthquake wave period equals the natural period of vibration of a building or
other structure? What will be an ideal response?

Question 2

Explain why there are no earthquakes deeper than about 700 kilometers.Explain why there are no earthquakes deeper than about 700 kilometers.

ansleighelindsey · **Reply #1 on:** Jul 15, 2018

Answer to Question 1

Resonance occurs and the swaying of the building will be amplified. The potential for damage or
collapse is greatly increased.

Answer to Question 2

Earthquakes require an elastic response. The deepest earthquakes occur within sinking lithospheric
plates, which lose their elasticity below about 700 kilometers because of increased heat and pressure.
The transition from brittle/elastic conditions to plastic conditions actually occurs at much shallower
depths than this in most areas of the world and typically corresponds with the base of the lithosphere