2007-06-03 13:19:45 · 5 answers · asked by kevintheman01 1 in Science & Mathematics ➔ Earth Sciences & Geology
Mainly 4 waves are generated from earthquakes. They are P wave is the primary wave. Generated from the point called focus. The speed of this wave is from 13 to 17 kilo meters per second. Moves the particles in its direction of propagation. you can assume that this is non destructive wave. The secondary waves comes from the point of focus. The speed is nearly half of the primary wave. This moves the particles perpendicular to the direction of its propagation. Destructive. Do not pass through liquid. These waves are called body waves. generated from earthquakes. The L wave and R waves are most dangerous waves coming from the surface of the earth. These waves are coming because of reflection and refraction. These are called surface waves. The speed is slower than other two waves.L wave gives only lateral movement and R wave or Raleigh wave is the rolling wave because it moves the building in elliptical direction it is most dangerous than any other waves.Visit my slide show at
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2007-06-03 20:23:40 · answer #1 · answered by A.Ganapathy India 7 · 0⤊ 0⤋
The wave on the earths surface do to the long wave length will cause buildings to sway. As the continued surface wave continues a building will continue to sway and strengthen because it's out of phase with the ground motion. Simply put the, top of a building moves in the opposite direction to the bottom. Eventually forces at work is too much and the building tumbles. The shorter the building the higher it's natural frequency would be and it's ability to follow the ground motion. This is why new high rise buildings in earth quake areas have movable bases to allow the ground to move beneath the building.
2007-06-03 13:41:19 · answer #2 · answered by Bob boB 2 · 0⤊ 0⤋
Surface waves can cause the most damage. To tell the difference to a person who might be in a quake, it is one that seems to be going up and down rather than side to side. I experienced both while living in Japan.
2007-06-03 13:35:57 · answer #3 · answered by kitnsass 2 · 0⤊ 0⤋
Surface wave because they are the ones moving at the very surface of the crust knocking over buildings.
As my 101 geo prof used to say "Earthquakes don't kill people, the buildings that fall on them do".
2007-06-03 13:23:03 · answer #4 · answered by Lady Geologist 7 · 2⤊ 0⤋
Surface waves. I'm guessing this is for homework. Anyways it's surface waves.
2007-06-03 13:40:05 · answer #5 · answered by Anonymous · 0⤊ 0⤋