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M6.4 Myanmar-India Border, 2011

Date:

4 February 2011

Epicentre:

NW of Myene, Sagaing

Time:

13:53:47 UTC  

Latitude:

24.616 N (PDE)

Longitude:

94.740 E (PDE)

Depth:

88.8 kms (PDE)

Magnitude:

Mw=6.4 (GFZ), 6.3 (PDE)

Additional Info


Map Disclaimer


A strong earthquake (M6.0 to 6.9 termed as "strong") occurred beneath the upper Myitkyina river valley along the Myanmar-India border, on 4 February 2011 at 19:25 PM local time in India and 20:05 PM local time in Bangladesh. It had a magnitude of Mw=6.4 and killed one person. Due to its depth, this earthquake has been extensively felt in north-east India, northern and central Myanmar as well as in Bangladesh. This is the largest earthquake in this general area since 1995.

The earthquake was centred 4 kms NW of Myene (Sagaing), Myanmar,
24 kms ENE of Shwelobo (Sagaing), Myanmar,

40 kms SE of Chhatrik (Manipur), India,
87 kms E of Imphal (Manipur), India,
134 kms SE of Kohima (Nagaland), India,
200 kms E of Silchar (Assam), India,
320 kms S of Dibrugarh (Assam), India,
325 kms NW of Mandalay (Mandalay), Myanmar,
348 kms SE of Guwahati (Assam), India,
413 kms N of Chauk (Magway), Myanmar,
453 kms ENE of Dhaka (Dhaka), Bangladesh,
532 kms NNE of Sittwe (Rakhine), Myanmar,
690 kms ENE of Kolkata (West Bengal), India.

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

Due to the depth of this earthquake it has been widely felt in north-east India, northern and central Myanmar as well as in Bangladesh.

At least one person died in the Monywa area in Sagaing division, Myanmar. Several buildings and bridges were also damaged in this area. Strong tremors were also felt at Maungdaw in Rakhine division.

Severe tremors were felt at the Moreh-Tamu border crossing on the Myanmar-India border where people found it difficult to walk, heavy furniture was shaken and animals outdoors were frightened according to felt reports received by this website. Very strong shaking was felt in the Manipur valley including Imphal. Many people ran outdoors in panic and buildings shook in the earthquake that lasted two minutes. Electricity poles were downed in Churachandpur district leading to power cuts. Window panes at the Manipur Secretariat were damaged in Imphal. At Kumbhirgram in south Assam, heavy furniture shifted on the ground floor and the earthquake was felt by everyone. Buildings developed hairline cracks at Silchar in Assam and at Dimapur in Nagaland.

This earthquake was felt widely in north-east India, including at Guwahati and Kumbhirgram in Assam, at Itanagar in Arunachal Pradesh, at Shillong and Tura in Meghalaya, at Dimapur in Nagaland. It was also felt in the states of Mizoram and Tripura. In eastern India, it was felt in parts of West Bengal including at Malda, Murshidabad, Nadia, North Dinajpur, Shiliguri and South Dinajpur. The earthquake was also perceptible in tall buildings as far as Kolkata in West Bengal and Bhubaneswar in Orissa. In Kolkata, a person on the 12th floor of a building felt tremors for close to three minutes and saw hanging objects moving. People working late in high-rise buildings in Newtown and Salt Lake went outdoors. In Bihar, it was felt at Patna and Purnea. Tremors were also felt in Jharkhand.

In Bangladesh, the earthquake was felt widely in the capital, Dhaka including in the suburbs of Agargaon, Baridhara, Gulshan, Saver and Uttara according to felt reports received by this website. Elsewhere in Bangladesh, it was strong at Barisal, Chittagong, Gopalganj, Munshiganj, Noakhali, Sirajganj and Sylhet where people ran outdoors in panic. It was also strongly felt in the Chittagong Hill Tracts. Mild tremors were also felt in Dinajpur and Mymensingh. People were felt the earthquake indoors and were frightened at Bagerhat, Bandarban, Bhola, Feni, Gaibandha, Gazipur, Rajshahi and Rangpur. It was also felt in Baguda, Chandpur, Choudagram, Jamalpur, Khulna, Lakshmipur, Narsinghdi and Sunanganj.

This is the largest earthquake in this general area since 6 May 1995 when a Mw=6.4 earthquake along the India-Myanmar border occurred to the north of the earthquake on 4 February 2011. The earthquake in 1995 was widely felt across the same region. Intermediate depth earthquakes in this general area are not unusual. The GFZ, HRV and NEIC moment tensor solutions show the greatest seismic moment release occurred on a thrust fault with a strike-slip component.

GFZ Event gfz2011cldo
11/02/04 13:53:46.52
Depth  62         No. of sta: 25
Moment Tensor;   Scale 10**18 Nm
  Mrr= 1.95       Mtt=-2.30
  Mpp= 0.35       Mrt= 0.46
  Mrp=-2.10       Mtp=-2.30
Principal axes:
  T  Val=  3.42  Plg=54  Azm= 97
  N       -0.20      32      310
  P       -3.22      16      210

Best Double Couple:Mo=3.3*10**18
 NP1:Strike=144 Dip=68 Slip= 125
 NP2:       263     40        36

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References
01) National Earthquake Information Centre (PDE), Golden, USA.
02) Harvard Centroid Moment Tensor Solution (HRV), Harvard, USA.
03)
Geo Forschungs Zentrum (GFZ), Potzdam, Germany.
04)
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: 21 Nov 2011 | Website Disclaimer

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