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A
light earthquake struck the
Sikkim Himalayas on 18 May 2007 at
18:10 PM local time resulting in some panic in the state of Sikkim, India. It had a magnitude of
Mb=4.6.
The earthquake was centred
in the vicinity of the village of Nambu (Sikkim),
India,
NNE 5.7 kms N of Dentam (Sikkim), India,
13.2 kms WNW of Ringchingpong (Sikkim), India,
20.9 kms E of Chyangthapu (Mechi zone), Nepal,
21.4 kms NW of Naya Bazaar (Sikkim), India,
31.1 kms NNW of Darjeeling (West Bengal), India,
40.5 kms NW of Kalimpong (West Bengal), India,
45.3 kms W of Gangtok (Sikkim), India,
49.6 kms NNE of Illam (Mechi zone), Nepal,
69.2 kms NNW of Shiliguri (West Bengal), India,
103 kms NNW of Jalpaiguri (West Bengal), India,
128 kms NE of Biratnagar (Kosi zone), Nepal.
Tremors from this earthquake were felt in many
parts of Sikkim including the capital, Gangtok. The earthquake was
felt at Ranka, Rangpo, Ranipool and Singtam. At Nam Nang
many people ran outdoors in panic. In Gangtok, it was felt for 3-4
seconds and many people went outdoors. The earthquake was also
felt in adjoining parts of West Bengal including in Darjeeling and
Mirik.
The
strongest earthquake in this region since a Mw=6.3 in 1980 was the
Mw=5.3 Mana earthquake on 14
February 2006 that killed 2 people and damaged many buildings
across the state. The earthquake on 18 February 2007 was the second tremor within a short span
of 48-hours to have occurred in this immediate region and
followed a Mb=4.0 earthquake that occurred
on 16 May 2007 in eastern Nepal, along the
Nepal-Sikkim border. These two earthquakes were then followed by the much stronger
M5.0 Singyang earthquake that
occurred on the evening of 20 May 2007.
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References
01)
National
Earthquake Information Centre (NEIC), Golden, USA.
02)
Harvard Centroid Moment Tensor Solution (HRV), Harvard, USA.
03)
Macroseismic information has been compiled by
the ASC from reports by local media and local NGO personnel.
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