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ILNS > Volume 61 > An Investigation of 2013 Mw 7.7 Awaran Earthquake,...
An Investigation of 2013 M<sub>w</sub> 7.7 Awaran Earthquake, Pakistan
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An Investigation of 2013 Mw 7.7 Awaran Earthquake, Pakistan

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Abstract:

Earthquake is a major disaster responsible for vast losses both life and infrastructure. Pakistan is one of the highly earthquake prone areas in Asia. The present study is carried out to investigate the dynamics of disastrous Awaran earthquake. The 2013 Mw 7.7 Awaran earthquake and its Mw 6.8 aftershock caused numerous loss of lives and vast infrastructure damages. The earthquake triggered along Hoshab fault rupturing 230 km of the fault. The rupture propagated at 3 Km/s on average and was concentrated in top 10 km with no major displacement in the underlying decollement. The rupture released a cumulative moment of 5.4 x 1020 Nm. This study reveals that although Hoshab fault originated as thrust fault, the slip was purely strike slip during the earthquake and that the rigid block rotation of southeastern Makran is responsible for the Awaran earthquake. The study concludes that the earthquake significantly increased the coulomb stress on Makran mega thrust and strike slip faults in Chaman fault system, hence increasing the risk of a major seismic event. Therefore, in order to prevent major loss of lives and infrastructure damages; designing of new building codes, reassessing the seismic hazard of the region and marking of hidden faults is of utmost importance.

Info:

Periodical:
International Letters of Natural Sciences (Volume 61)
Pages:
36-42
DOI:
https://doi.org/10.18052/www.scipress.com/ILNS.61.36
Citation:
I. Mahmood et al., "An Investigation of 2013 Mw 7.7 Awaran Earthquake, Pakistan", International Letters of Natural Sciences, Vol. 61, pp. 36-42, 2017
Online since:
January 2017
Authors:
Irfan Mahmood, Muhammad Farooq Iqbal, Muhammad Rizwan Mughal, Muhammad Imran Shahzad, Shahina Tariq, Kalim Ullah
Keywords:
Awaran Earthquake, Chaman Fault, Hoshab Fault, Makran Subduction Zone, Seismic Hazard, Strike-Slip Movement
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Distribution:
Open Access

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Creative Commons Attribution 4.0 International License

References:

[1] I. Mahmood et al., Revisiting major earthquakes in Pakistan, Geology Today. 31 (2015) 33–38.

[2] USGS Report, Information on http: /earthquake. usgs. gov/earthquakes/eventpage/usb-000jyiv#general_summary [accessed 15 July, 2016].

[3] NDMA Report, Awaran Earthquake Balochistan, (2013).

[4] Information on http: /www. redcross. org. hk/en/disaster-relief_prepard/appeal_update_detail. html?year=2013&id=1694 [accessed 15 July, 2016].

[5] A. Kumar, Balochistan Earthquake of September, 2013 and birth of islands off the Makran Coast of southern Pakistan, Earth Science India. Popular Issue, VII(I) (2014) 1-12.

[6] A.M. Kassi et al., Newly discovered mud volcanoes in the Coastal Belt of Makran, Pakistan – tectonic implications, Arabian Journal of Geosciences. 7(11) (2014) 4899-4909.

DOI: https://doi.org/10.1007/s12517-013-1135-7

[7] R. Reilinger et al., GPS constraints on continental deformation in the Africa‐Arabia‐Eurasia continental collision zone and implications for the dynamics of plate interactions, Journal of Geophysical Research: Solid Earth. 111(B5) (2006).

DOI: https://doi.org/10.1029/2005jb004051

[8] R. Jolivet et al., The 2013 Mw7. 7 Balochistan earthquake: Seismic potential of an accretionary wedge, Bulletin of the Seismological Society of America. 104(2) (2014) 1020-1030.

DOI: https://doi.org/10.1785/0120130313

[9] N. Ambraseys, R. Bilham, Earthquakes and associated deformation in northern Baluchistan 1892-2001, Bulletin of the Seismological Society of America. 93(4) (2003) 1573-1605.

DOI: https://doi.org/10.1785/0120020038

[10] W.R. Szeliga et al., Interseismic strain accumulation along the western boundary of the Indian subcontinent, Journal of Geophysical Research: Solid Earth. 117(B8) (2012).

DOI: https://doi.org/10.1029/2011jb008822

[11] H. Fattahi et al., Coseismic and postseismic deformation due to the 2007 M5. 5 Ghazaband fault earthquake, Balochistan, Pakistan, Geophysical Research Letters. 42(9) (2015) 3305-3312.

DOI: https://doi.org/10.1002/2015gl063686

[12] Y. Zhou et al., The 2013 Balochistan earthquake: An extraordinary or completely ordinary event?, Geophysical Research Letters. 42(15) (2015) 6236-6243.

DOI: https://doi.org/10.1002/2015gl065096

[13] W.D. Barnhart et al., Evidence for slip partitioning and bimodal slip behavior on a single fault: Surface slip characteristics of the 2013 Mw7. 7 Balochistan, Pakistan earthquake, Earth and Planetary Science Letters. 420 (2015) 1-11.

DOI: https://doi.org/10.1016/j.epsl.2015.03.027

[14] W.D. Barnhart et al., Ball-and-socket tectonic rotation during the 2013 Mw7. 7 Balochistan earthquake, Earth and Planetary Science Letters. 403 (2014) 210-216.

DOI: https://doi.org/10.1016/j.epsl.2014.07.001

[15] R. Zinke, J. Hollingsworth, J.F. Dolan, Surface slip and off‐fault deformation patterns in the 2013 MW 7. 7 Balochistan, Pakistan earthquake: Implications for controls on the distribution of near‐surface coseismic slip, Geochemistry, Geophysics, Geosystems. 15(12) (2014).

DOI: https://doi.org/10.1002/2014gc005538

[16] A. Van Horne et al., Strike-slip earthquakes on moderately-dipping faults, In: EGU General Assembly Conference Abstracts. 16 (2014) 4547.

[17] J.P. Avouac et al., The 2013, Mw7. 7 Balochistan earthquake, energetic strike-slip reactivation of a thrust fault, Earth and Planetary Science Letters. 391 (2014) 128-134.

DOI: https://doi.org/10.1016/j.epsl.2014.01.036

[18] R.D. Lawrence et al., Thrust and strike slip fault interaction along the Chaman transform zone, Pakistan, Geological Society, London, Special Publications. 9(1) (1981) 363–370.

DOI: https://doi.org/10.1144/gsl.sp.1981.009.01.33

[19] N. Haghipour et al., Rate of crustal shortening and non-Coulomb behaviour of an active accretionary wedge: The folded fluvial terraces in Makran (SE, Iran), Earth and Planetary Science Letters. 355 (2012) 187-198.

DOI: https://doi.org/10.1016/j.epsl.2012.09.001

[20] G.L. Smith et al., Thermal structure and megathrust seismogenic potential of the Makran subduction zone, Geophysical Research Letters. 40(8) (2013) 1528-1533.

DOI: https://doi.org/10.1002/grl.50374
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