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M5.5 Eastern Bhutan, 2009


31 December 2009


NW of Drametse, Bhutan


09:57:30 UTC (15:57:30 BTT)


27.332 N (PDE)


91.412 E (PDE)


10.0 kms (PDE)


Mb 5.5 (PDE), 5.7 (GSR)

Additional Info

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A moderate earthquake (M5.0-5.9 termed as "moderate") occurred in eastern Bhutan on 31 December 2009 at 15:57 PM local time in Bhutan. It had a magnitude of Mb=5.5 and caused some additional minor damage in the region struck by a Mw=6.1 earthquake in September and another Mb=5.2 event in October.

The earthquake was centr
ed 5.4 kms NW of Drametse, Bhutan,
15.6 kms W of Tashigang, Bhutan,
23 kms ENE of Mongar, Bhutan,
53.3 kms WSW of Tawang (Arunachal Pradesh), India,
62 kms N of Darrang (Assam), India,
133 kms NNW of Guwahati (Assam), India,
153 kms NNE of Goalpara (Assam), India,
167 kms NW of Nagaon (Assam), India,
204 kms N of Shillong (Meghalaya), India,
282 kms NE of Rangpur, Bangladesh,
420 kms NNE of Dhaka, Bangladesh,
609 kms NNE of Kolkata (West Bengal), India.

If you felt this earthquake, please take the time to fill out a felt report questionnaire.

Two people were injured after being struck by falling objects in Drametse; a child at Waichur village in Drametse gewog after being struck by a falling rock that was holding down roof shingles and an 18-year old woman who was injured by a falling builder at Udzorong.

As many as 700 buildings were damaged in Trashigang Dzong in this earthquake, many of which were damaged in the earthquakes in September and October. In Drametse, two houses that were damaged in September and October, collapsed partially. The earthquake was felt strongly and caused damage in Kanglung gewog, where it was much more severe when compared to the two previous earthquakes. Villagers ran outdoors and remained in the open for several hours in spite of the cold weather and rain for fear of aftershocks. 3 houses partially collapsed and 151 houses were damaged at Kanglung, 61 of which were damaged in the previous earthquakes. In Bartsham gewog, 242 houses were damaged, including 149 damaged by the previous two earthquakes sustained further damage. 90 houses were damaged in Lumang gewog and two developed severe cracks in Shongphu gewog. 4 houses collapsed in the Sherimuhung area. 6 houses were damaged n Radhi gewog. In Yangneer gewog, at least 100 houses were 'affected' while at Khaling, 85 houses were damaged, Damage was also reported from Thrimshing where, just as in Kanglung, people remained outdoors despite bad weather. A school was also damaged at Udzorong in Trashigang. This earthquake was felt strongly in Pemagatsel and Trashiyangtse gewogs. It was also felt in the capital, Thimphu.

Tremors were also felt in adjoining parts of India in the states of Assam and Meghalaya. In Guwahati, Assam, it was felt for close to 15-seconds in high-rise buildings causing some panic.

01) National Earthquake Information Centre (NEIC), Golden, USA.
Geophysical Survey of the Russian Academy of Sciences (GSR), Obninsk, Russia.
Macroseismic information has been compiled by the ASC from reports by local media and local NGO personnel.

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Map Disclaimer
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: 04 Jan 2010 | Website Disclaimer

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