2007-04-21 23:54:30 · 12 answers · asked by antony b 1 in Science & Mathematics ➔ Earth Sciences & Geology
Only earthquakes with an up/down movement on the seafloor can generate the pressure wave or tsunami. Many earthquakes have a side motion, like the San Andreas fault, these do not push the water, so no tsumani is generated no matter how strong. it is not easy to determine from a seismograph on land what the direction of movement was, so without pressure bouy data at sea, it is easy to have false alarms.
2007-04-22 08:58:41 · answer #1 · answered by lare 7 · 0⤊ 0⤋
tsunami occurs when there is a earthquake in the seabed of a sea or ocean .Due to the earthquake in the seabed the level of the waves rises further causing tsunami.So, tsunami is occured only when there a earthquake in the seabad and this is no way related to the earthquake in the land.
2007-04-22 05:31:16 · answer #2 · answered by ruthwik 1 · 0⤊ 0⤋
Easy--not every earthquake originates in the sea or at the edge of the sea. Even those that do may shake sideways, instead of up and down. Up and down motions are more likely to cause a wave. The massive indonesian earthquake a few years ago was an up and down type, it raised entire islands, one 80 miles long, up to 5 feet higher than before the quake. Other islands sank below the surface.
2007-04-22 13:30:04 · answer #3 · answered by Anonymous · 0⤊ 0⤋
maybe the earthquake just isn't strong enough. The earthquake has to happen under the sea to cause a tsunami, and has to be strong enough to cause the massive waves to hit the shore
2007-04-21 23:59:01 · answer #4 · answered by ? 4 · 0⤊ 0⤋
tsunami takes place in water. All earthquakes do not occur in water. many occur on land. Earthquakes which takes place on land doesn't affect water and hence tsunami doesn't take place on every earthquake. Tsunami affects only when tectonic plates of earth in sea shake.
2007-04-24 20:01:03 · answer #5 · answered by Amrapali Nayak 1 · 0⤊ 0⤋
Tsunami's are caused by the disturbance of the Tectonic plates underground. These disturbances are known to us as earthquakes etc...................So, i think, that's why Tsunami's do not occur during Earthquakes!
2007-04-22 01:49:04 · answer #6 · answered by allan 2 · 0⤊ 0⤋
For causing tsunami, the moments of the tectinic plates should be under the sea and should be strong enough to create disturbance in the sea. This very common phenomenon in pecific but due do no damage to people it is not accounted.
2007-04-22 00:27:22 · answer #7 · answered by Sharma, Dr. Vinay k. 4 · 0⤊ 0⤋
not always tsunami hits when there is an earthquake.only when there is an underwater quake which also has an impact on the land tsunami hits.
2007-04-25 15:38:01 · answer #8 · answered by priyakiddy 2 · 0⤊ 0⤋
It can. If there is sufficient warning provided, lives can be saved. But generally nighttime tsunamis are much more dangerous. Also depending on the tide. There are times when warning is not able to be provided timely enough. In this case, just pray. I wish you safety.
2016-05-21 00:25:21 · answer #9 · answered by myung 3 · 0⤊ 0⤋
TSUNAMI ARE CAUSED BY UNDERSEA EARTHQUAKE HAVING INTENSITY GREATER THAN 7 MOSTLY. SEASHORE LANDS ARE NATURALLY PROTECTED FROM TSUNAMI BY CORALREEFS. THEY SLOW DOWN THE SPEED OF THE WAVES. SADLY THESE REEFS WERE DESTROYED BY RESORT DEVELOPERS. UNPROTECTED TSUNAMI WILL CREATE HAVOC ON LANDS. ; )
2007-04-22 00:14:15 · answer #10 · answered by DYNAMITEBERT 1 · 0⤊ 0⤋