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M6.6 Off South Sentinal Island Earthquake, 2008

Date:

27 June 2008

Epicentre:

WSW of South Sentinal Isl

Time:

11:40:14 UTC (17:10:14 IST)

Latitude:

10.870 N (PDE)

Longitude:

91.781 E (PDE)

Depth:

17 kms (PDE)

Magnitude:

Mw=6.6 (HRV), Ms=6.9 (PDE)

Additional Info


 

Map Disclaimer


A strong earthquake (red star) occurred in the eastern Bay of Bengal to the west of South Sentinal Island, India, on 27 June 2008 at 17:10 PM local time. It had a magnitude of Mw=6.6 and was felt in many parts of the Andaman Islands. Tremors were also felt on the Coromandel Coast in the Chennai metropolitan area in Tamil Nadu, India. It was followed by another strong earthquake of Mw=6.1 on 28 June (yellow star).

The earthquake on 27 June was centre
d 49 kms WSW of South Sentinal Island, India,
66 kms WNW of Jackson Creek (Little Andaman Island), India,
87 kms WNW of Hut Bay (Little Andaman Island), India,
106 kms SW of Jahaj (Rutland Island), India,
139 kms SW of Port Blair (South Andaman Island), India,
221 kms NNW of IAF Malacca (Car Nicobar Island), India,
491 kms NNW of Campbell Bay (Great Nicobar Island), India,
1225 kms SE of Bhubaneswar (Orissa), India,
1277 kms E of Chennai (Tamil Nadu), India.

If you felt these events, please take the time to fill out a felt report questionnaire. Tremors from this earthquake strongly felt in the Andaman Islands where people rushed outdoors in panic. Power supply was cut as a precautionary measure and later restored. Tremors were also felt along the east coast of India in the city of Chennai, Tamil Nadu. Distinct tremors from the earthquake at 17:10 IST were felt by people in high-rise buildings and in a few instances people went outdoors. In the city, the earthquake was felt at Ambattur, Gopalapuram, Kodambakkam, Koyambedu, Mylapore, Nandanam, Nungambakkam, Padi, T. Nagar and Vadapalani. Tremors were also felt by people outdoors at ground level. Minutes after the tremor, power supply was disrupted in many parts of the city, including Anna Nagar, Ashok Nagar,  Sowcarpet, Vadapalani and Virugambakkam.

The event at 17:10 IST on 27 June 2008 was the largest with a magnitude of Mw=6.6. At least 24 aftershocks of M>4.5 were recorded until 30 June (listed below). These included a Mw=5.7 at 18:37 IST (13:07 UTC) on 27 June as well as a Mw=6.1 at 18:24 IST (12:54 UTC) and a Mb=5.7 at 21:59 IST ((15:29 UTC) on 28 June. Earthquakes in the magnitude range of Mw=7.0 or above that originate in the vicinity of the Andaman & Nicobar Islands have historically been felt on the east coast of India including a few earthquake below this range. The last occurrence was on 24 July 2005 when a Mw=7.3 earthquake near Teresa Island in the Nicobar Islands was felt along much of the Coromandel Coast of India as well as in Sri Lanka.

 

Day

UTC

M

T

Lat.

Long.

Z

Location

Net.

30jun

02:10

4.9

Mb

11.32

91.68

33.0

54.1 kms W of Rutland Island

2

29jun

04:38

4.6

Mb

10.30

91.82

33.0

64 kms WSW of Point Alcock, Little Andaman

2

29jun

04:14

5.0

Mb

10.75

91.63

10.0

68.3 kms WSW of South Sentinal Island

3

29jun

00:32

5.0

Mb

10.99

91.73

10.0

53 kms W of South Sentinal Island

3

28jun

20:18

4.9

Mb

10.91

91.86

33.0

40 kms WSW of South Sentinal Island

2

28jun

17:17

4.7

Mb

10.85

91.89

28.5

38 kms WSW of South Sentinal Island

3

28jun

15:55

5.3

Mb

10.74

91.89

33.0

44.3 kms WSW of South Sentinal Island

2

28jun

15:29

5.4

Mb

10.81

91.85

33.0

44 kms WSW of South Sentinal Island

3

28jun

14:30

4.7

Mb

10.84

91.87

35.0

40.3 kms WSW of South Sentinal Island

3

28jun

13:57

5.0

Mb

10.73

91.69

10.0

63 kms WSW of South Sentinal Island

3

28jun

13:52

4.5

Mb

10.85

91.93

33.0

34.1 kms WSW of South Sentinal Island

2

28jun

13:31

4.8

Mb

10.83

91.94

33.0

34.1 kms WSW of South Sentinal Island

2

28jun

13:13

4.8

Mb

10.80

91.96

33.0

31 kms SW of South Sentinal Island

2

28jun

12:54

6.1

Mw

10.59

91.75

11.7

65.8 kms SW of South Sentinal Island

3

28jun

04:35

5.1

Mb

10.89

91.74

26.8

52 kms WSW of South Sentinal Island

3

28jun

03:26

4.9

Mb

10.88

91.91

28.3

34.6 kms WSW of South Sentinal Island

3

27jun

19:19

5.2

Mb

11.17

91.68

33.0

62.6 kms WNW of South Sentinal Island

2

27jun

18:05

5.2

Mb

10.89

91.85

25.7

40.4 kms WSW of South Sentinal Island

3

27jun

15:00

4.8

Mb

11.68

92.03

33.0

23.1 kms NW of North Sentinal Island

2

27jun

14:54

4.5

Mb

11.62

91.57

33.0

60 kms W of North Sentinal Island

2

27jun

14:36

4.7

Mb

10.81

91.79

33.0

50.3 kms WSW of South Sentinal Island

2

27jun

13:07

5.7

Mw

10.85

91.67

10.0

60.7 kms WSW of South Sentinal Island

3

27jun

12:29

4.8

Mb

10.97

92.03

33.0

20.3 kms W of South Sentinal Island

2


References
01) India Meteorological Department (IMD), Delhi.
02)
Geophysical Survey of the Russian Academy of Sciences, Obninsk, Russia (GSR).
03) National Earthquake Information Centre, Golden, CO, USA (NEIC/PDE).
04) Macroseismic information has been compiled by the ASC from reports by local media and local NGO personnel.

Page Citation
Information on this page may be reproduced in print or electronically but it is requested that a citation be given to this website in the form of a link i.e. "www.asc-india.org".

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: 08 Aug 2008 | Website Disclaimer

Amateur Seismic Centre, Pune,