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Sunday, April 26, 2015, Baishakh 13, 1422 BS, Rajab 6, 1436 Hijr

Chronology of quakes in BD
Staff Correspondent
Published : Sunday, 26 April, 2015,  Time : 12:00 AM,  View Count : 45
Information on earthquakes in and around Bangladesh is available for the last 250 years. The earthquake record suggests that since 1900 more than 100 moderate to large earthquakes occurred in Bangladesh, out of which more than 65 events occurred after 1960. This brings to light an increased frequency of earthquakes in the last 30 years. The increase of tremors is an indication of fresh tectonic activity or propagation of fractures from the adjacent seismic zones.
Before the coming of the Europeans, there was no definite record of earthquakes. Following is a chronology of important earthquakes from 1997.
1997: Occurred on 22 November in Chittagong with a magnitude of 6.0. It caused minor damage around Chittagong town. 1999: Occurred on 22 July at Maheshkhali island with the epicenter in the same place, a magnitude of 5.2. Severely felt around Maheshkhali Island and the adjoining sea. Houses cracked and in some cases collapsed.
2003: Occurred on 27 July Kolabunia union of Barkal upazila, Rangamati district with magnitude 5.1. The time was a 05: 17: 26.8 hours.
2006: Known as the Narail earthquake. This tremor occurred on 5 August. The earthquake had a magnitude estimated 4.2 on the Richter scale with epicenter located 110 km southwest of Dhaka near Narail. The tremor was widely felt in Dhaka as well as other places in the country.
2008: Known as the Manikganj earthquake. A minor earthquake jolted Dhaka and surroundings on the evening of 20 March 2008 and created considerable panic among the city dwellers. The earthquake had a magnitude measured 3.8 on the Richter scale. The epicenter was situated in Manikganj 41 km west-northwest of DUEO. It was believed to be originated from the Madhupur fault. Known as Mymensingh earthquake, this temblor occurred in the middle of the night of 27 July 2008.The epicentre was located 12 km northeast of Mymensingh city and120 km north of Dhaka. It had a magnitude estimated 5.1 on the Richter scale. Apart from Mymensingh where the earthquake caused panic, tremors from this earthquake were felt in many parts of the Dhaka metropolitan area. In the same year, another earthquake  known as Chandpur Earthquake. An earthquake with couple of aftershocks jolted Dhaka on the evening of 20 September 2008 just before Iftar. It caused tremendous panic among the city dwellers. The epicenter was 50 km southeast of Dhaka near Kachua of Chandpur. The magnitude was 4.5 on the Richter scale.
2009: Known as eastern Bhutan earthquake. A strong earthquake occurred on the day of Eid-ul-Fitr, 21 September 2009. The epicenter was situated in eastern Bhutan, 410 km north-northeast of Dhaka. It originated from the Main Central Thrust (MCT). This distant quake had a magnitude of 6.1, but shook most of Bangladesh including Dhaka. In the same year, another earthquake known as Bay of Bengal Earthquake. Occurred on 11 August at Bangladesh time 01:55:35:.61 hours. The epicentre was located at the North Andaman Islands of the Bay of Bengal and seacoast of Myanmar. The magnitude recorded was 7.5. Though no significant damage was reported throughout Bangladesh the tremor was felt strongly in Dhaka.
2010: Occurred on 10 September night at 11:30 pm local time. The tremor was felt in Dhaka and its surrounding areas with magnitude 4.8. The epicentre was 45 km southwest from Dhaka.
2011: Occurred on 6:30 pm local time with magnitude 6.8. It lasted for 2 minutes. The tremor felt was strong enough in Capital city Dhaka and the districts of northern part of Bangladesh The epicenter was 500 north from Dhaka in Indian Sikkims's capital Gangtok.
Around 12:11pm on Saturday: A massive tremor was felt in the capital and in many other areas of Bangladesh.
According to USGS, the earthquake measuring 7.9 magnitude had its epicentre 29km south-east of Nepal's Lamjung, and  the epicentre of the quake was 29km east of Lamjung and was 2km deep, making it a shallow quake.
The quake, epicenter in Nepal, left to several buildings collapsed and claimed hundreds of lives in Nepal.

Editor : Iqbal Sobhan Chowdhury
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