how strong must be an earthquake(on the richter scale) to cause a tsunami?
Aug 24, 2010
in
Earthquake Questions
Also how tall was the 2004 tsunami at sri lanka and how many km did it covered?
Like this post? Subscribe to my RSS feed and get loads more!
3 comments
pitademon2000 on August 24, 2010 at 2:47 pm
.1 (notice the decimal)
Thing is it is not just how strong a quake is, it is where it is located, and how exactly it moved. Areas where the fault line is a subduction zone and underwater will more likely cause a tsunami than a quake from a transversal (side to side) faults in the middle of the country.
The Banda Ache quake/tsunami (actually there where several waves …it is called a ‘wave train’) was about 30 ft high when it crested (depending on where it hit, but that is an average), and in areas ran 1-3 miles inland.
please note also that sometimes tsunamis are caused by other than quakes. Volcanoes, landslides, avalanches also can cause tsunamis.
trickworm on August 24, 2010 at 2:47 pm
Maybe between a 3 or 5 level earthquake
A.Ganapathy India on August 24, 2010 at 2:47 pm
The fallowing are the main factors for creation of Tsunami. My close observation helped me to issue the warning 2 hours before Tsunami struck our coast. I am in this research from the year 2001 that is from the death of 100,000 because of Gujarat earthquake.
1.The magnitude must be not less than 7 in Richter scale,
2. The depth of focus point must be fairly less that is to say from 10 to about 50 K/M only,
3. The tectonic plate should have moved up and down called compressional,
4.Other two types of movements namely extensional & transform will not create Tsunami .
5. Better visit my web site for full details http://www.disasterresearchfoundations.com
6. It covered up to about 4000 K/M that is up to Somalia,
7.The wave height was from 250 C.M to 12 c.m at the end.