2011 Van earthquakes

23 October 2011 Van earthquake

UTC time
	A: 2011-10-23 10:41:22
	B: 2011-11-09 19:23:33
ISC event
	A: 17394270
	B: 604370429
USGS-ANSS
	A: ComCat
	B: ComCat
Local date	A: 23 October 2011 B: 9 November 2011
Local time	EEST: UTC+03.00
	A: 13:41
	B: 21:23 (EET?)
Magnitude
	A: 7.1 Mww[1]
	B: 5.6 Mww[2]
Depth	A: 7.6 km (4.7 mi)[3] B: 5.0 km (3.1 mi)[4]
Epicenter	38°37′41″N 43°29′10″E / 38.628°N 43.486°E / 38.628; 43.486
Areas affected	Eastern Turkey
Max. intensity	A: MMI VIII (Severe)[5] B: MMI VII (Very strong)[6]
Peak acceleration	~0.5 g
Casualties	604 killed and 4,152 injured in 23 October earthquake[7]

The 2011 Van earthquakes occurred in eastern Turkey near the city of Van. The first earthquake happened on 23 October at 13:41 local time. The shock had a M_ww magnitude of 7.1 and a maximum Mercalli intensity of VIII (Severe).^[5] It occurred at a shallow depth, causing heavy shaking across much of eastern Turkey and lighter tremors across neighboring parts of the South Caucasus and Levant. According to Disaster and Emergency Management Presidency on 30 October, the earthquake killed 604 and injured 4,152. At least 11,232 buildings sustained damage in the region, 6,017 of which were found to be uninhabitable. The uninhabitable homes left as much as 8,321 households with an average household population of around 7.6 homeless in the province; this could mean that at least around 60,000 people were left homeless. The other 5,215 have been damaged but are habitable.^[7][8][9] A separate earthquake within the same earthquake system happened on 9 November at 21:23 local time (19:23 UTC). 38 people were killed and 260 people were injured in the 9 November earthquake.^[10]

The magnitude 7.2 (M_ww) Eastern Highlands earthquake occurred inland on 23 October 2011 at 13:41 local time (EEST), centered about 16 kilometres (9.9 mi) north-northeast of Van, Turkey and at an estimated focal depth of 7.2 kilometres (4.5 mi). Its focal region and much of easternmost Turkey lie towards the southern boundary of the complex zone of continental collision between the Arabian plate and the Eurasian plate, beyond the eastern extent of the Armenian and Asia Minor fault zones. Part of the convergence between these two plates takes place along the Bitlis-Zagros fold and thrust belt.^[11] The earthquake's focal mechanism indicates oblique thrust faulting, consistent with the expected tectonics in the region of the Bitlis-Zagros Fault Zone, where thrust mechanisms dominate.^[12][13]

The size of the rupture has been estimated as 60 km x 20 km, consistent with the observed distribution of aftershocks, on a WSW-ENE orientated fault plane with a dip of about 35°. An offset of about 2 metres (6 ft 7 in) has been estimated at 10–15 kilometres (9.3 mi) depth but there is no visible rupture of the ground surface. The rupture lasted for about 50 seconds.^[14]

USGS ShakeMaps showing the intensity patterns for the mainshock (left) and the 9 November event

Due to its great intensity and shallow depth, the earthquake produced significant ground motions across a large area. Severe shaking measuring MM VIII on the Mercalli scale occurred in Van, although widespread strong to severe (MM VI–VIII) shaking was observed in many smaller and less populated areas around the epicenter.^[5] Lighter but well-felt ground motions (MM V–III) spread much farther across the region, extending into surrounding countries such as Armenia, Azerbaijan, Georgia, Iran, Iraq, Israel and Syria.^[5][15][16]

There have been 1,561 aftershocks above magnitude 2.0 as of 30 October. The highest magnitude aftershock came at 11:45 pm Local on 23 October, with a MI 5.7 and M_w  6.0. The number of aftershocks reported in ranges as follows:^[7] 556 ranging from magnitude 2 to 3; 832 ranging from magnitude 3 to 4; 108 ranging from magnitude 4 to 5; and 7 ranging from magnitude 5 to 6. In the first five months there were 9,367 aftershocks with magnitudes in the range 1.5 to 5.8.^[17]

The earthquakes affected much of eastern Turkey, demolishing hundreds of buildings and burying numerous victims under the rubble. Erciş, a town near Van, was hardest hit by the violent shaking; at least 55 destroyed buildings, 45 fatalities, and 156 injuries occurred in the town alone.^[18] Most of the buildings collapsed along the town's main road and were residential, raising the possibility of a higher death toll. In smaller villages near the epicenter, the shaking demolished almost all the brick houses.^[19]

In Van city center, at least 100 people were confirmed dead, and 970 buildings collapsed in and around the city.^[20] About 200 inmates escaped after the walls of a prison succumbed to the shaking, although 50 were quickly recaptured.^[19] The Van Ferit Melen Airport was damaged, but contradictory reports were given: According to NTV, airplanes were diverted to the neighboring cities, while according to the Anatolia News Agency, the earthquake did not disrupt the air traffic.^[21][22] The natural gas, water, power, and communication systems in Van were all reported affected and in function again within 24 hours after the earthquake.^[13]

Twenty-four hours following the main shock the death toll stood at 264 but estimates were ranged up to a thousand.^[23] As of 25 October, rescue and aid efforts are still ongoing, as many as 40,000 people are believed to be homeless due to the considerable number of collapsed or damaged buildings. Multiple news reports on 27 October suggest up to 2300 are injured with many still caught under rubble but this figure increased to over 4100 by 30 October.^[8][24] Latest figures suggest that casualties exceeds 604 and an estimated 2200 buildings are damaged or destroyed in the affected areas.^[7][8] The death toll was caused primarily from building collapse in urban areas.^[13]

As of 23 October, The Turkish government had responded the disaster with 1,275 personnel, 174 vehicles, 290 health officials, 43 ambulances, and 6 air ambulances. Local people also joined the rescue action, some using their bare hands.^[25] Survivors and opposition politicians have criticized the crisis management of the government.^[26]

On 27 October Disaster and Emergency Management Presidency announced that 13 million TL (around $7 million US) has been sent so far in terms of emergency relief efforts. Another 8.6 million TL (just under $5 million US) has been donated via charity so far. There are now a total of 3,826 search and rescue officers, 904 medical personnel, 18 search dogs, 651 construction equipment and vehicles, including 146 ambulances, 7 rescue choppers (air ambulances), 46 generators, 77 projectors, 95 portable toilets, 37 mobile kitchens, 3,051 kitchen sets, 6,359 catalytic stoves and a mobile oven in the disaster area. 25,185 tents sent by Turkish Red Crescent Society were distributed. 10 collective shelter tents, 60 prefabricated houses, 90 Mevlana Transitional Houses(translation needed) houses have also been erected. 109,986 blankets, 1,150 quilts and 5,109 sleeping bags have also been distributed. 3 meals a day are being provided with distribution of hot meals food etc. Also 30 field tents have been set up for public services and psychosocial trauma support.^[27]

As of 27 October, in some sites, rescue work had been stopped where attention was turning to the needs of the survivors,^[28] however, there were still survivors found and saved from the rubble on the same day and thereafter.^[29][30] The government had announced that tents will be delivered to those whose homes were deemed unsafe rather than whoever lined up asking for one.^[31]

According to Disaster and Emergency Management Presidency as of 30 October, 12:00 UTC there were 4,440 search and rescue personnel, 1,710 medical personnel, 18 search dogs, 651 construction equipment and vehicles including 146 ambulances, 143 generators, 77 projectors, 95 portable toilets, 42,711 tents (including 8,166 from overseas aid), 54 collective shelter tent, 69 general purpose tents, 65 prefabricated houses, 2,300 Mevlana houses, 160,360 blankets, 1,179 quilts, 37 mobile kitchens, 3,051 kitchen sets, 6,899 catalytic stoves, 5,792 sleeping bags, and 1 mobile kitchen were present.^[7]

The European Union and NATO expressed their condolences and NATO offered help.^[32] The President of the de facto Turkish Republic of Northern Cyprus Derviş Eroğlu also sent condolences.^[33] United States President Barack Obama said: "We stand shoulder to shoulder with our Turkish ally in this difficult time and are ready to assist the Turkish authorities."^[34]

Armenia,^[35] Azerbaijan,^[36] Bulgaria, Bosnia and Herzegovina, China,^[37] Denmark,^[38] Georgia, Germany,^[39] Greece, Hungary, Iran,^[40] Ireland,^[41] Israel,^[16] Japan, Kosovo, New Zealand, Pakistan,^[42] Poland, Portugal,^[43] Russia, South Korea, Sweden, Switzerland, Taiwan,^[44] Ukraine, the United Kingdom, and the United States also offered Turkey aid after the earthquake.^[45][46] People in over 200 cities taking part in Thrill the World 2011 also pledged all proceeds from their efforts.^[47]

Turkish President Abdullah Gül, said that Turkish teams were capable of handling the disaster management.^[48] Thus, as of 23 October, Turkey stated that it had acknowledged but declined all the aid proposals with the exception of neighbouring Azerbaijan, Bulgaria,^[49] and Iran,^{[citation needed]} with aid and rescue workers arriving at the affected area shortly after the quake struck without notifying Ministry of Foreign Affairs.^{[36][50][51][52]} Azerbaijan sent 145 rescuers at night on 23 October, another two rescue teams were sent to Turkey afterwards, bringing the total number to 213 rescue personnel. The Azerbaijani teams rescued 12 people, pulled 60 bodies from the rubbles.^[53] The Iranian Red Crescent set up relief camps to accommodate people made homeless by the quake. Several injured were transferred for treatment to the Iranian border city of Khoy.^{[citation needed]} However, on 25 October, Turkey announced that they would accept aid from other countries also.

The Turkish government is looking for tents, prefabricated houses, and living containers.^[54] The United Nations was sending thousands of tents as well as blankets and mattresses from 28 October on.^[28][55]

The U.N. Office for the Coordination of Humanitarian Affairs (OCHA) stated that Erzurum would be a hub for international assistance sent by plane, and Van had been asked to establish a centre for assistance coming overland.^[31]

As of 27 October, aid from other countries are as follows: Azerbaijan sent search and rescue team of 145 people, 1,250 tents, 700 beds, 40 generators, 5,000 blankets, 40 pieces of kitchen equipment. 490 tents by France, 200 tents by Italy, 284 tents by Russia, 60 tents, 300 blankets, 300 beds, and 60 stoves by Kazakhstan, 4 general purpose tents by Ukraine, 7 prefabricated houses by Israel and tents for 2000 by Belgium sent.^[7][56] Also Armenian government sent 40 tons of cargo to Turkey, including tents, sleeping bags, blankets and bedding.^[57] On 31 October Bulgaria provided 100 tents for winter conditions and will provide 50 more tents, 1,000 blankets and 300 mats.^[58]

Rescue personnel were able to extricate twenty-three survivors from the rubble of 2 hotels and one apartment building, but the bodies of 7 others were also retrieved. Since most buildings were evacuated after the October 2011 earthquake, only those 3 buildings were occupied, otherwise the death toll could have been worse.^[59]

A 5.7 magnitude earthquake occurred 16 kilometres (9.9 mi) southwest of Van (near the town of Edremit) at a shallow depth of 4.8 kilometres (3.0 mi) on 9 November at 21:23 local time (19:23 UTC).^[4] Early reports from Deputy Prime Minister Beşir Atalay stated that the event caused five deaths in the collapse of several hotels, though 25 buildings in total had fallen, with most of those buildings being empty since the earthquake a month earlier. The Turkish Anatolian Agency reported that the event was followed by an aftershock measuring 4.4.^[60]

Among the buildings collapsed by the earthquake was the six-story Bayram Hotel, which was hosting journalists and rescue workers. A cameraman for the Cihan News Agency had left the hotel just prior to the earthquake and said that some journalists trapped in the rubble in the building had sent text messages to colleagues asking to be rescued. The building, which had been renovated the previous year, was forty years old.^[59][61] A Japanese aid worker who had traveled to Turkey for the October earthquake relief work was reported to have been pulled alive from the rubble of the Bayram hotel but later died of his injuries at a hospital. Residents were angry with authorities for not having closed the building after it suffered cracks and a damaged elevator in the large earthquake a month earlier.^[62]

The Kandilli earthquake center of Turkey said that the 9 November earthquake was an independent earthquake within the same earthquake system.^[63]

The government response in terms of emergency assistance was marginal. Temporary shelter was provided mainly by container houses. Approximately 20,000 containers were sent to the earthquake zone. The main problem with this was supplying so many containers in such a short time. Approximately four months after the Van earthquake, the container cities were settled. As a result of this the victims could only be accommodated in container cities after March 2012. Until March 2012 most of the victims set up their own tents for shelter. Many people preferred nylon based materials for economic reasons. Nylon has low ignition temperature and during winter many tent fires occurred. 12 people are dead and more than 160 people are injured because of tent fires^[64] In an interview with The New Yorker, Garo Paylan from the Peoples' Democratic Party (HDP) reasoned that the Government of Recep Tayyip Erdogan did not want to assist the Kurds who are the majority in Van.^[65]

• List of earthquakes in 2011
• List of earthquakes in Turkey

Wikimedia Commons has media related to 2011 Van earthquake.

• Van Earthquake Report by ITU Earthquake Engineering and Disaster Management Institute
• Video showing the aftermath of the first quake – The Daily Telegraph
• The International Seismological Centre has a bibliography and/or authoritative data for this event.
• ReliefWeb's main page for this event.