The 2008 Ziarat earthquakes hit the Pakistani province of

Balochistan Balochistan ( ; , ), also spelled as Baluchistan or Baluchestan, is a historical region in West and South Asia, located in the Iranian plateau's far southeast and bordering the Indian Plate and the Arabian Sea coastline. This arid region o ...

on October 29 with a

moment magnitude The moment magnitude scale (MMS; denoted explicitly with or Mwg, and generally implied with use of a single M for magnitude) is a measure of an earthquake's magnitude ("size" or strength) based on its seismic moment. was defined in a 1979 paper ...

of 6.4. The

US Geological Survey The United States Geological Survey (USGS), founded as the Geological Survey, is an agency of the U.S. Department of the Interior whose work spans the disciplines of biology, geography, geology, and hydrology. The agency was founded on March ...

reported that the first earthquake occurred north of

Quetta Quetta is the capital and largest city of the Pakistani province of Balochistan. It is the ninth largest city in Pakistan, with an estimated population of over 1.6 million in 2024. It is situated in the south-west of the country, lying in a ...

and southeast of the

Afghanistan Afghanistan, officially the Islamic Emirate of Afghanistan, is a landlocked country located at the crossroads of Central Asia and South Asia. It is bordered by Pakistan to the Durand Line, east and south, Iran to the Afghanistan–Iran borde ...

city of

Kandahar Kandahar is a city in Afghanistan, located in the south of the country on Arghandab River, at an elevation of . It is Afghanistan's second largest city, after Kabul, with a population of about 614,118 in 2015. It is the capital of Kandahar Pro ...

at 04:09 local time (28 October, 23:09

UTC Coordinated Universal Time (UTC) is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones. UTC facilitates international communica ...

) at a depth of , at 30.653°N, 67.323°E. It was followed by another shallower magnitude 6.4 earthquake at a depth of approximately 12 hours after the initial shock, at 30.546°N, 67.447°E. 215 people were confirmed dead. More than 200 were injured (according to Mohammed Zaman, assistant to the Balochistan chief secretary, Nasir Khosa), and 120,000 were rendered homeless (according to Dilawar Khan Kakar,

Ziarat Ziarat (Urdu and ) is a city in the Ziarat District of the Balochistan (Pakistan), Balochistan province in Pakistan. It lies away from Quetta, the provincial capital of Balochistan. Previously, it was part of Sibi district. It was announced as ...

mayor and chief administrator). Qamar Zaman Chaudhry, director general of Pakistan Meteorological Department, stated the quake

epicenter The epicenter (), epicentre, or epicentrum in seismology is the point on the Earth's surface directly above a hypocenter or focus, the point where an earthquake or an underground explosion originates. Determination The primary purpose of a ...

was north of Quetta, and about southwest of

Islamabad Islamabad (; , ; ) is the capital city of Pakistan. It is the country's tenth-most populous city with a population of over 1.1 million and is federally administered by the Pakistani government as part of the Islamabad Capital Territory. Bu ...

Tectonic summary

Western and northern Pakistan lie across the complex plate boundary where the

Indian plate The Indian plate (or India plate) is or was a minor tectonic plate straddling the equator in the Eastern Hemisphere. Originally a part of the ancient continent of Gondwana, the Indian plate broke away from the other fragments of Gondwana an ...

is colliding with the Eurasian plate. In this area the convergence is highly oblique, with the relative northward movement of the Indian plate of 40 mm/yr (1.6 inches/yr) being at a low angle to the plate boundary. The main

active fault An active fault is a fault that is likely to become the source of another earthquake sometime in the future. Geologists commonly consider faults to be active if there has been movement observed or evidence of seismic activity during the last 10,0 ...

s are dominated by sinistral (left-lateral) strike-slip motion, with the Chaman Fault being the most important structure, accommodating a large proportion of the plate boundary displacement. The shortening component of the convergence is mainly accommodated by the Kirthar and Sulaiman

fold and thrust belt A fold and thrust belt is a series of mountainous foothills adjacent to an orogenic belt, which forms due to contractional tectonics. Fold and thrust belts commonly form in the forelands adjacent to major orogens as deformation propagates outwards ...

s. There is a sharp change in orientation of these two thrust belts near Quetta, known as the Quetta

Syntaxis Syntaxis is a style in writing or in rhetoric that favors complex and a poetic style syntax, in contrast to the simple sentence structures of parataxis. For example, 19th-century German academic prose, and John Milton's ''Paradise Lost ...

, where the north–south trending Kirthar ranges meet the west–east trending Sulaiman ranges. This area is the most seismically active part of this oblique segment of the plate margin, producing major earthquakes such as the 1935 Quetta event, which caused at least an estimated 30,000 deaths.

Earthquake sequence

The earthquake sequence began at 22:33 UTC on October 28, with a magnitude 5.3

foreshock A foreshock is an earthquake that occurs before a larger seismic eventthe mainshockand is related to it in both time and space. The designation of an earthquake as ''foreshock'', ''mainshock'' or aftershock is only possible after the full sequenc ...

. This was followed just over 30 minutes later at 23:09 by the first of the M 6.4 doublet earthquakes. The second M 6.4 doublet earthquake occurred at 11:32 on October 29. There were five significant aftershocks in the period up to December 12, including three M>5 earthquakes on that day. The observed

focal mechanism The focal mechanism of an earthquake describes the Fault (geology)#Slip.2C heave.2C throw, deformation in the Hypocenter, source region that generates the seismic waves. In the case of a Fault (geology), fault-related event, it refers to the ori ...

s were almost all

strike-slip In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic ...

in type, but it remained unclear which faults ruptured during the sequence, with both southwest–northeast trending sinistral (left lateral) and northwest–southeast trending dextral (right lateral) faults being proposed. Investigations using

InSAR Interferometric synthetic aperture radar, abbreviated InSAR (or deprecated IfSAR), is a radar technique used in geodesy and remote sensing. This geodetic method uses two or more synthetic aperture radar (SAR) images to generate maps of surface defo ...

data supported activity on multiple faults in both of these orientations.

Damage

Most of the casualties were from two villages on the outskirts of

town. Balochistan chief minister

Aslam Raisani Muhammad Aslam Khan Raisani () (born 5 July 1955 in Sarawan, Balochistan) is a four times elected member of the Provincial Assembly of Balochistan who served as the Chief Minister of Balochistan from 9 April 2008 until 14 January 2013. Family ...

ordered declaration of emergency in the hospitals of the affected areas. These areas, situated on steep terrain, were badly damaged by

landslide Landslides, also known as landslips, rockslips or rockslides, are several forms of mass wasting that may include a wide range of ground movements, such as rockfalls, mudflows, shallow or deep-seated slope failures and debris flows. Landslides ...

s caused by the quake. Hundreds of mud houses were destroyed. The tremors were felt in

, Pishin, Qila Abdullah, Mastung,

Sibi Sibi (; ;) is a city situated in the Balochistan (Pakistan), Balochistan Subdivisions of Pakistan, province of Pakistan. The city serves as the administrative headquarters of the Sibi District, district and Sibi Tehsil, tehsil of the same name ...

, Bolan, Kuchlak and

Loralai Loralai (, ), also known as Bori (), is a Pakistani city that serves both as the division headquarter of Loralai Division and the district headquarter of Loralai District. It is located in the northeastern part of Balochistan province of Paki ...

Response

Dilawar Khan, mayor of

Ziarat District Ziarat () is a district in the north of Balochistan province of Pakistan. Ziarat town (situated at an altitude of about 2,400 meters) is the headquarters of the district, the sub-division, and also of the tehsil. The highest peak of Khalifat Hills ...

, stated that his office had requested support from the local government.

Pakistani military The Pakistan Armed Forces (; ) are the Military, military forces of Pakistan. It is the List of countries by number of military and paramilitary personnel, world's sixth-largest military measured by Active duty, active military personnel and c ...

helicopters and troops were dispatched to assess damage and aid victims.

References

External links

Crisis briefing Pakistan quake 2008
Fro
Reuters Alertnet BBC, In pictures: Pakistan quakeBBC, History of deadly earthquakes
* * {{DEFAULTSORT:2008 Pakistan Earthquake Pakistan earthquake Earthquakes in Pakistan

Earthquake An earthquakealso called a quake, tremor, or tembloris the shaking of the Earth's surface resulting from a sudden release of energy in the lithosphere that creates seismic waves. Earthquakes can range in intensity, from those so weak they ...

History of Balochistan, Pakistan (1947–present)