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M5.7 Kolabunia Earthquake, 2003


26 July 2003


SW of Daluchari,Chittagong


23:18:17 UTC (05:18:17 BST)  


22.892 N (ISC)


92.331 E (ISC)


2.6 kms (ISC)


Mw 5.7 (HRV), 5.6 (NEIC)

Additional Info

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A moderate earthquake occurred in the Chittagong Hill Tracts near the Bangladesh-India border on 26 July 2003 at 05:18 AM local time causing some damage to property and 3 deaths. The earthquake had a magnitude of Mw=5.7 and was felt at many places in south-eastern Bangladesh.

The earthquake was centred 5.7 kilometres SW of Daluchari (Chittagong), Bangladesh,
14.1 kilometres W of Demagiri (Mizoram), India,
31.7 kilometres ENE of Rangamati (Chittagong), Bangladesh,
75.6 kilometres NNW of Buntlang (Mizoram), India,
81.5 kilometres NE of Chittagong (Chittagong), Bangladesh,
99.6 kilometres SSW of Aizwal (Mizoram), India,
150 kilometres SE of Agartala (Tripura), India,
165 kilometres NNE of Cox's Bazaar (Chittagong), Bangladesh,
217 kilometres SE of Dhaka (Dhaka), Bangladesh.

3 people were killed and 25 injured by this earthquake. Two women were killed when a mud house collapsed in the town of Rangamati. Another person died a few days later, from a heart attack he suffered during the earthquake. Five of the injured came from Rangamati district where the roof of the Aymyachhara Health Complex collapsed in the town of Barkhol. The Union Parishad building collapsed in Barkhol. Two people were also injured when two acres of a paddy field subsided in Kolabunia. Several buildings including a school were damaged in the town of Rangamati. Five acres of land near the school reportedly "caved in". 18 buildings were damaged in the Langadu area. The residential buildings of TNO and Upazila Chairman, upazila Krishi office, Krishi Bank, Post office, food godown, police station and a building of Rabeta Al Islami, were among the structure that were damaged. Throughout the region nearly 500 buildings were damaged.

The shock was also strongly felt in the port city of Chittagong where most residents were woken up and ran outdoors. Power supply to some parts of the city was cut as a transformer exploded at Modunaghat Grid Sub-station resulting in a small fire. Several buildings, including the Divisional Public Library Building developed cracks. Two 6-storey buildings at Halishahar which were under construction and a 100-year old building in the Nandakanon area also developed cracks. Buildings also developed cracks in the city of Cox's Bazaar further to the south, as well on the offshore islands of Moheskhali, Kutubdia and Sonadia. An unusual rise in the water level and 'turmoil' in the sea during the earthquake caused panic among the people. Tremors from the earthquake were also felt in adjoining parts of the Indian state of Tripura and were also strong enough to wake up residents of Dhaka, near 200-kilometres away.

A mild aftershock of magnitude 3.7 was experienced at 13:34 local time and was followed later in the day by a moderate sized event of magnitude 5.3 at 18:10 local time which was felt in Chittagong. This is the strongest earthquake in this region since 1997, when several people were killed in the M6.1 Bandarban earthquake near Chittagong. Another strong aftershock was experienced on 01 August 2003.

01) International Seismological Centre (ISC), Berkshire.
02) National Earthquake Information Centre (NEIC), Golden, USA.
Harvard Centroid Moment Tensor Solution (HRV), Harvard, USA.
04) Macroseismic information has been compiled by the ASC from reports by local media and local NGO personnel.

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International boundaries of India (especially Arunachal Pradesh, Jammu & Kashmir, Himachal Pradesh and Uttarakhand) on the displayed map are from Google Maps. These do not conform to the external boundaries of India recognized by the Survey of India. That they are displayed on this page via Google Maps, is only for display purposes and this should not be misinterpreted as an endorsement of these boundaries by the Amateur Seismic Centre (ASC).

Page Updated: 21 Feb 2008 | Website Disclaimer

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