The survey team assigned by the Ministry of Science and Technology to research occurring explosions and tremors in Bac Tra My District reported their findings to the People’s Committee of Quang Nam Province on Thursday.
|Landslide near the Song Tranh 2 Hydropower Plant area (Photo: SGGP)|
Dr. Tran Tuan Anh, head of Geological Sciences who led the survey team said that after conducting a thorough research of 24 highly vulnerable spots along the Tranh River from Bac Tra My to Nam Tra My District, they concluded that the explosions and tremors were being caused by accumulation of water at the Song Tranh 2 Hydropower Plant reservoir.
Dr. Anh said that fault lines existed in the area before the Song Tranh 2 Hydropower Plant was built. Water accumulated in the plant reservoir just increases pressure on these fault lines which then results in high pressure explosions leading to tremors.
Dr. Anh said that earthquakes at the base of reservoirs of hydropower plants were a normal occurrence. Once the water in the reservoir reaches normal capacity, tremors will stop. He asked residents not to be unduly worried.
Meanwhile, Dr. Le Truong Son, one of the members of the survey team, said that the tremors occurring in Bac Tra My District might be more complex as their intensity is up to 3.5-4 on the Richter scale, which won’t affect the hydropower plant but might cause harm to residents.
As a result, Dr. Son said that it is important to identify the most vulnerable zones for earthquakes and set up measures to evacuate residents from those areas.
Tran Minh Ca, deputy chairman of the provincial People’s Committee proposed to the Institute of Science and Technology to issue an official report so as to calm the residents.
The people’s committee has already proposed to the institute to install an earthquake observation station in Bac Tra My District and continue research on the unusual occurrence of depressions and landslides in close proximity of the Song Tranh 2 Hydropower Plant area.