Scientists discovered the first geological evidence of an earthquake at the junction of Assam and Arunachal Pradesh, which was recorded as the Sadiya earthquake in history. This discovery may contribute to the earthquake disaster map of the eastern Himalayas, thereby helping the construction and planning of the area.
♦ The site is close to the Tudin-Tidding suture zone-the main part of the eastern Himalayas, where the Himalayas bend to the south and connect to the Burmese mountains in India.
♦ Scientists from the Wadia Institute of Himalayan Geology (WIHG) conducted a large trench excavation in Himebasti village in Arunachal Pradesh. Geological technology has analyzed it.
♦ WIHG is an autonomous agency under the Department of Science and Technology (DST) of the Government of India.
♦ Scientists found large tree trunks in the youngest flood sediments at the exit of the Subansiri River (Sadiya Town is about 145 kilometers southeast of the Subansiri River), which indicates that the river experienced a series of aftershocks until six months later before the earthquake occurred.
♦ The catchment is a term used in geology for sediment deposition to increase land elevation.
♦ Aftershocks are earthquakes with the greatest impact following an earthquake sequence. They are smaller than the mainshock and within 1-2 break lengths from the mainshock.