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M5.8 Central Siahan Range Earthquake, 2011

Date:

10 August 2011

Epicentre:

E of Washuk, Baluchistan

Time:

00:53:27 UTC (05:53:27 PST)

Latitude:

27.701 N (PDE)

Longitude:

65.048 E (PDE)

Depth:

54.1 kms (PDE)

Magnitude:

Mw=5.8 (PDE)

Additional Info


Map Disclaimer


A moderate earthquake (M5.0 to 5.9 termed as "moderate") occurred in the Siahan ranges between the towns of Washuk and Pishuk on 10 August 2011 at 05:53 AM local time in in Pakistan. It had a magnitude of Mw=5.8 and is known to have caused some damage in the epicentral region.

The earthquake was centred 25 kms E of Washuk (Baluchistan), Pakistan,
31.4 kms WNW of Pishuk (Baluchistan), Pakistan,
62 kms NE of Mughalgor (Baluchistan), Pakistan,
104 kms SSW of Kharan (Baluchistan), Pakistan,
120 kms NE of Panjgur (Baluchistan), Pakistan,
152 kms W of Khuzdar (Baluchistan), Pakistan,
146 kms SSE of Dalbandin (Baluchistan), Pakistan,
339 kms SSW of Quetta (Baluchistan), Pakistan,
372 kms NW of Karachi (Sindh), Pakistan.

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Mud houses in the town of Khuzdar were damaged in this earthquake. Many people ran outdoors in fear reciting the Kalma-e-Tayaba. Shaking was felt in several parts of Baluchistan including at Dalbandin, Kalat, Khuzdar, Sibi, Quetta and Washuk in Baluchistan. In upper Sindh it was felt at Shahdadkot. Mild tremors were also felt in lower Sindh by a few people in Clifton, Defence, Kharadar, Korangi, North Karachi, Landhi and Sadar in Karachi.

This is the largest earthquake in Baluchistan since a Mw 7.2 earthquake struck near the town of Dalbandin in January 2011. The USGS and GFZ centroid moment tensor solutions for the event on 10 August 2011 indicate the greatest seismic moment release occurred on a normal fault with a strike-slip component. The predominantly normal faulting mechanism of this earthquake along with its depth suggests that it might have occurred either within the subducting Arabian Plate or within the over-riding Eurasian Plate.

GFZ MOMENT TENSOR SOLUTION
Depth  52         No. of sta: 86
Moment Tensor;   Scale 10**17 Nm
  Mrr=-1.55       Mtt= 1.21
  Mpp= 0.34       Mrt= 1.87
  Mrp=-0.55       Mtp= 1.21
Principal axes:
  T  Val=  4.48  Plg=10  Azm=321
  N       -0.54      52       64
  P       -3.94      36      223

Best Double Couple:Mo=4.2*10**17
 NP1:Strike=267 Dip=73 Slip= -34
 NP2:         8     57      -159

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References
01) National Earthquake Information Centre (PDE), Golden, USA.
02) Geo Forschungs Zentrum, Potzdam (GFZ), Germany.
03) Macroseismic information has been compiled by the ASC from reports by local media and local NGO personnel.

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Page Updated: 11 Aug 2011 | Website Disclaimer

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