Monday, April 29, 2013

How Earthquakes in Chile Have Permanently Deformed Earth

A map of an the area in Chile where scientists examined signs that millenia of earthquakes had left permanent deformation of the ground.

  

Earthquakes can permanently crack the Earth, an investigation of quakes that have rocked Chile over the past million years suggests.

Although earthquakes can wreak havoc on the planet's surface, more than a century of research has suggested the Earth actually mostly rebounds after quakes, with blocks of the world's crust elastically springing back, over the course of months to decades, to the way they initially were. Such rebounding was first seen after investigations of the devastating 1906 San Francisco temblor thathelped lead to the destruction of more than 80 percent of the city. The rebound is well-documented nowadays by satellite-based GPS systems that monitor Earth's movements.

No comments:

Post a Comment

Related Posts Plugin for WordPress, Blogger...