Ultrasonics and Seismolog1

Ultrasonics and Seismolog1 - .The :,thesoundwaves(or...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Ultrasonics and Seismology Ultrasonics works because sound travels at different speeds through materials of different densities and rigidities. The  same is true within the Earth: if there is a disturbance which sets the Earth jiggling at some location, the sound waves (or  vibrations) will pass through the Earth itself and may be felt, and interpreted, some distance away. This is commonly used by  geophysicists when they set off small explosions (sticks of dynamite buried in the ground) and use a network of nearby  detectors to determine whether, say, the subterranean geology is likely to be housing an oil deposit. If we want to study the  deep  interior of the Earth, right down to the core, we will obviously need to give the Earth a pretty  good jolt to start with, and then analyse the vibrations using an far-flung international network of detecting instruments. How 
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/09/2012 for the course AST 1002 taught by Professor Emilyhoward during the Spring '10 term at Broward College.

Ask a homework question - tutors are online