Signs of tsunami remnants detected in Nghe An.

January 31, 2012 14:28

The Institute of Geophysics - Vietnam Academy of Science and Technology has carried out a number of scientific research projects...

The Institute of Geophysics - Vietnam Academy of Science and Technology has conducted several scientific studies on ancient tsunamis in Vietnam and initially concluded that: In the coastal area of ​​Nghe An, there are geological anomalies, especially the appearance of shell beds containing scallop mounds filled with shells. Some of the most recent investigations suggest that three tsunamis may have occurred at approximately 4,500-4,300; 4,100-3,900; and 900-600 years ago.

Illustrative image. Source: Internet.

Associate Professor Cao Dinh Trieu from the Institute of Geophysics stated: Scientists from the Institute have investigated and discovered several scallop mounds and shell beaches in Quynh Van commune, Nghi Tien commune, and Dien Chau town. Under coastal sand dunes, such as in Nghi Yen, the shells are estimated to be between 4,500 and 4,300 years old, and the formation of these scallop mounds and beaches cannot be explained by ancient humans eating and piling up shells, or by tectonic activity.

Initial findings and research on ancient tsunamis in Nghe An province may lead to some conclusions regarding the potential and intensity of earthquake and tsunami disasters that could occur in Vietnam.MaleAccording to Associate Professor Cao Dinh Trieu, in the event of the largest earthquake occurring in the Manila subduction zone (Philippines), with a magnitude of 9 on the Richter scale, the tsunami could reach the Nghe An coast with a maximum height of 7 meters. For the source area being the Baram fault zone, and with an 8-magnitude earthquake, the tsunami could reach the Nghe An coast with a height of just over 1 meter. If an earthquake of magnitude 7.5 occurs offshore in North Central Vietnam along the Ca River fault, the tsunami could reach 10 meters at the coast of Dien Chau town.

Paleotidal wave research is a relatively new area of ​​study in Vietnam, beginning in 2005 with surveys of paleotidal wave traces conducted jointly by scientists from the Institute of Geophysics and experts from the Institute of Earth Physics of the Russian Federation. Since then, several publications have presented preliminary findings regarding the possibility of paleotidal waves occurring along Vietnam's coastal and island areas.Male.


According to VNA