29 - waves then short, closely spaced waves) piles up...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
October 12, 2010 Three Big Faults in the Bay Area: San Andreas, Hayward, Calveras Directivity Pulses = the big pulse of energy is primary shear wave energy Because the shear wave velocity is only slightly slower than the rupture  velocity * Doppler Shift—if the energy source is moving or not Ex: If a train goes by, the sound goes down as it goes past you High pitch-high frequency, short wave length (Loud) As train passes, shifts to lower frequencies as it goes away from you  The energy source (the noise) is moving relative to us Every split second it is moving it is omitting a sound wave Sound source is moving, almost as fast as the waves are moving (big long period 
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: waves then short, closely spaced waves) piles up energy at the front, shear wave energy In any given Earthquake, when a shear wave passes by, the ground will go horizontally and vertically everywhere Kobe, Japan-site in 1995 of a very large, damaging EQ magnitude 6.9 Killed over 5000 people Ground motions were really strong 2. Surface Waves Two Types: travel around the Earth on the surface, and dont penetrate down into the body of the Earth 1. Rayleigh Waves Water wave SEE DIAGRAM 5 Motion like youre surfing- Prograde Ellipse 2. Love Waves Waves trapped in the shallow Earths crust by total internal reflection 01:06 01:06 01:06...
View Full Document

Page1 / 4

29 - waves then short, closely spaced waves) piles up...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online