Various parts of the country, including Dhaka, were shaken by the earthquake at 9:35 am on Saturday. Like the last few earthquakes, this earthquake also had its origin within the country. According to the United States Geological Survey (USGS), the magnitude of the earthquake at its source in Ramganj Upazila of Laxmipur was 5.5.
Seismologist and Bangladesh Open University Vice-Chancellor Syed Humayun Akhtar has identified the origin of the earthquake as a subduction zone (Sylhet to Cox’s Bazar region). He is a retired Professor of Geology Department of Dhaka University. He fears that the huge energy that has been accumulated in this zone for almost a thousand years can cause an earthquake of magnitude 8.2 to 8.9 at any time. Interviewed by Fahmida Akhter.
Syed Humayun Akhtar: In a study with Columbia University, we analyzed 12 years of data. The results of the research show that the subduction zone has passed through the Meghna River through Sunamganj, Kishoreganj Haor to the Bay of Bengal. This line subducts the Indian plate, which lies to the west, under the mountain range to the east. Huge energy has been stored in this zone for almost thousands of years. It can cause earthquakes of magnitude 8.2 to 8.9. There are two parts in this zone. One is the Lock Zone, which is part of us. There the India (India) and Burma (Myanmar) plates are stuck, one with the other. And another zone is our eastern region which is in Myanmar and Mizoram region. Earthquakes in this region are often reported in newspapers. But such earthquakes do not happen all the time in our region. Over the years we have been seeing mild to moderate earthquakes here. It is a precursor to the occurrence of a large earthquake. There is no alternative to the earthquake that will occur in the subduction zone. Because, the amount of energy that is stored, will come out one day or the other. Be it today, tomorrow or 70 years from now. If it does, it will be a severe earthquake. And the damage will be more in populated areas like Dhaka or Chittagong.
Syed Humayun Akhtar: Today’s earthquake occurred in a subduction zone. Due to the amount of energy stored in this region, earthquakes can occur anywhere in this belt at any time. That is, from Sylhet to Cox’s Bazar, an earthquake can occur anywhere in this belt at any time. Today is in Ramganj, five months ago it was in Rupganj of Narayanganj. These are in the subduction zone. Now an earthquake anywhere in a subduction zone is a harbinger of a major earthquake.’Early signs of these big earthquakes’ Read more