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A moderate
earthquake (M5.0-5.9 termed as "moderate") occurred
in eastern Bhutan on 29 October 2009
at 23:00 PM local time in Bhutan.
It had a magnitude of Mb=5.2 and caused some additional damage in
the region struck by a
Mw=6.1 earthquake in September. A
stronger
Mb=5.5 event followed this earthquake on 31
December 2009.
The earthquake was centred
9.1 kms W of Damoitse, Bhutan,
16.6 kms E of Mongar, Bhutan,
21 kms W of Trashigang, Bhutan,
45 kms SSE of Lhuntsi, Bhutan,
60 kms SSW of Tawang (Arunachal Pradesh), India,
93.2 kms N of Nalbari (Assam), India,
129 kms NNW of Guwahati (Assam), India,
168 kms ESE of Thimphu, Bhutan.
If you felt this earthquake,
please take the time to fill out
a felt report questionnaire.
This earthquake struck the Mongar-Trashigang region that was badly
affected by a
Mw=6.1 earthquake on 21 September
2009. This latest earthquake caused further damage but did not
result in any injuries or loss of life. In Trashigang dzongkhag,
one house collapsed and 17 were damaged at Udzorong. Elsewhere in
the dzongkhag, 5 buildings were damaged at Lumang and 50 at
Yangneer. In Mongar dzongkhag, five buildings were were damaged at
Mongar, 4 at Narang, 3 at Ngatshang, 6 at Sheri Muhung, 11 at
Thangrong and 5 at Tsakhaling. In Pemagatshel dzongkhag, 10
buildings were damaged. A primary school in Chimung gewog damaged
earlier was damaged badly with its classrooms and staff quarters
now made unsafe. In Lhuentse, 4 houses in Sengor gewog were
damaged. People spent the night outdoors in the villages of
Dungmanma and Kherey while at Rangjung people were frightened but
no panic ensued. Tremors were felt as far west as 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 10-seconds in high-rise buildings causing some panic. The
earthquake was also felt in northern Bangladesh including in the
towns of Mymensingh and Sylhet; at Mymensingh some people ran
outdoors in panic when the earthquake hit.
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References
01)
National
Earthquake Information Centre (NEIC), Golden, USA.
02) Geophysical Survey of the Russian Academy
of Sciences (GSR), Obninsk, Russia.
03)
Macroseismic information has been compiled by
the ASC from reports by local media and local NGO personnel.
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