Earth Quake Waves
Earth quake waves are the vibrations sent out through the ground by earth quakes (see earth quakes) they are also called seismic waves. There are two kinds of deep earth quake waves:Primary(P) waves and Secondary(S) waves.
Primary waves travel at 5 km per second and move by alternately squeezing and stretching rock. Secondary waves travel at 3 km per second and move the ground up and down of from side to side. There are two kinds of surface wave: love waves and Rayleigh waves. Love or waves shake the ground from side to side in a jerky movement that can often destroy very tall buildings. Rayleigh or R, waves shake the ground up and down, often making it seem to roll. In solid ground earth quake waves travel too fast to be seen. However, the can turn looses sediments into a fluid-like material so, that earth quake waves in the sea. When waves ripple a cross loose sediment they can uproot tall buildings.Ø Surface waves travel much slower than deep waves, but they are usually the ones that cause the most damage.
Planet Earth Book (41)
GROLIER
0 Response to "Fisika EarthQuake Waves"
Posting Komentar