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Discover the world of seismic waves, the elastic forces that shape our planet. Learn about body waves like P and S waves that traverse Earth's interior and surface waves such as Love and Rayleigh waves. Unravel wavefronts, frequencies, and the bending of rays as they hit interfaces under Snell's Law. Dive into the complexities of wave interactions within Earth's increasing density and bending paths. Explore the unique labels and combinations of seismic wave phenomena. Watch informative movies to deepen your understanding of seismic wave dynamics.
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Seismic waves are elastic waves. Four types: 2 Body Waves. So called because they travel through the Earth. These are P & S waves. P = primary S = secondary or shear 2 surface waves. So called because they travel primarily on surface. These are Love waves and Rayleigh waves.
Period, amplitude and frequency Equations for Vp and Vs
Since Vp > Vs > Vsw P waves generally arrive at a station first.
Mag 6.9 Earthquake in Kamchatka Recorded in Mount Soledad
What happens to waves in the Earth? Density increases due to pressure but so do the bulk and shear moduli. Therefore rays bend!
P-wave SZ is between 104° and 140°. S-wave SZ between 104 ° and 256°
Labeling Waves. P = direct P S = direct S p = P-wave that travels up first s = S-wave that travels up first PP = One bounce at surface of P wave SS = One bounce at surface of S wave c = reflection from core K = P wave through outer core I = P wave through inner core i = P wave refected from inner core J = S wave through inner core Combine: PcP = P wave that bounces off outer core and goes to surface PcS = P wave that bounces off outer core and converts to S which Travels to the surface ScS = S wave that bounces off outer core and goes to surface etc
