Another scientific theory has been released by a leading seismologist stating that tsunami that hit north east Japan last Friday after the earthquake only come once every 1,000 years.
After studying the last week’s event in Japan destroying hundreds of buildings and taking thousands of lives. Dr. Roger Musson head of seismic hazard at the British Geological Survey said that this kind of phenomena is also similar to what happened in Sendai back in 869AD.
He also added that such kind of tsunami generating under the sea is an unusual thing to happen in this part of Japan. Records in 19th and 20th century’s shows that most of the Earthquakes occurring in the coastline part of the country come from Offshore.
In 869AD a tsunami strikes Sendai which moved up to 4Km in land, causing widespread flooding. The disaster was called “Jogan”.
The tsunami that strike recently in Japan has a wave height of up to 10 meter. However, official wasn’t able to know how far the water traveled in the land.
“I would imagine it would be about the same, because it is hard to think that there would be any larger earthquakes than this in this part of the world” Dr. Musson said when he was interviewed by a reporter.
According to records acknowledge by the BGS there were also some large earthquakes recorded in the region in 1933 and in the 1890’s.
Dr. Musson said in a statement that if you know how often magnitude 9 earthquake are, you will get magnitude 8 earthquakes roughly 10 times as often and magnitude 7 earthquakes approximately 100 times as often.
On the other hand, a researcher reacted that they would be cautious to draw about the frequency of such events, given how seismically active this region is.