| Magnitude |
7.1 |
USGS |
| Time |
Sunday, October 23, 2011 at 10:41:21 UTC |
| Epicenter Latitude |
38.691°N |
| Epicenter Longitude |
43.497°E |
| Depth |
16 km |
| Distances |
16 km (9 miles) NNE of Van, Turkey
118 km (73 miles) N of Hakkari, Turkey
127 km (78 miles) SSE of Agri (Karakose), Turkey
929 km (577 miles) E of ANKARA, Turkey |
| Style of Fault |
almost EW oriented thrust earthquake |
CEDIM Forensic Earthquake Analysis Group -Turkey (Van) Earthquake – 24.10 0900CET — Report 1 |
| Tectonics |
- Faulting dominated by compressional tectonics associated with the Bitlis Suture Zone, Zagros Fold, and the thrust belt of Iran.
- Within about 70 km of the M7 earthquake on November 11, 1976 that killed about 3,900 people
|
Courtesy of Harley Benz from USGS |
| Aftershock Sequence |
- As of 31st October 2011, there have been over 1792 aftershocks greater than magnitude 2.
- Over 7 aftershocks have been greater than magnitude 5:
- M5.6 and M5.9 soon after the earthquake
- M6.0 about 10 hours after the earthquake
- M5.7 which caused much additional damage including collapsed houses.
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CEDIM Forensic Earthquake Analysis Group -Turkey (Van) Earthquake – 24.10 0900CET — Report 4 |
| Strong Motion Records |
- A few records are available. Click here for some websites with available records.
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| Age Statistics |
- 52% of the population of Van province are under 20 years old
- 3% are older than 65 years old
- 40% are children under 15, one third of them (13% of the total Van Province population) are from 0-4 years old.
|
ABPRS Database (State Institute of Statistics, Turkey) |
| Damage Statistics |
- 3 million TRY (around 1.66 million USD) is required for initial emergency relief
- Red alert level for economic losses.
- “Extensive damage is probable and the disaster is likely widespread. Estimated economic losses are less than 1% of GDP of Turkey. Past events with this alert level have required a national or international level response. Orange alert level for shaking-related fatalities. Significant casualties are likely.”–USGS PAGER System
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USGS PAGER System
CEDIM Forensic Earthquake Analysis Group -Turkey (Van) Earthquake – 25.10 1500CET — Report 2
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| Death Toll |
- death toll is at 461 as of October 26, 2011
- 1352 people injured
- at least 125,400 people became homeless due to the earthquake
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CEDIM Report on Shelter Needs
CEDIM Forensic Earthquake Analysis Group -Turkey (Van) Earthquake – 26.10 1500CET – Report 3
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| Homeless Estimation |
- at least 125,400 people became homeless due to the earthquake
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Comparing the current impact of the Van Earthquake to past earthquakes in Eastern Turkey |
| Temporary Housing |
- Turkish Red Crescent is preparing to provide temporary shelter for around 50,000 people
- 17,836 tents have been transported to the earthquake area
- The Red Crescent mobilized 76,560 blankets, 1120 food packages, 10,064 food parcels, 36 mobile kitchens, 3051 kitchen sets, and 5139 catalytic stoves.
- 3000 units of temporary housing have been planned for creation within a month
- 16,500 container houses (4-8 person capacity) are going to be built as part of shelter phase before permanent reconstruction occurs
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CEDIM Report on Shelter Needs
CEDIM Forensic Earthquake Analysis Group -Turkey (Van) Earthquake – 26.10 1500CET – Report 3
CEDIM Forensic Earthquake Analysis Group -Turkey (Van) Earthquake – 24.10 0900CET — Report 4
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| Search & Rescue Teams |
- 4400 search and rescue personnel
- 860 medical personnel
- 18 search dogs
- 595 construction equipment and vehicles, including 140 ambulances, 7 rescue choppers, 33 generators and 95 portable toilets.
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CEDIM Report on Shelter Needs |
| Damage to Infrastructure |
- 200 technical staff are undertaking preliminary assessment of buildings
- 14,156 buildings either collapsed or were severely damaged
- 17,923 buildings moderately or slightly damaged at this point in the preliminary assessment
- Power supply and telecommunication broken down in Van and Ercis.
- The airport of Van City is located at the lake shore, and has been damaged but seems operational now.
- Soft story collapse regularly occurred in Turkish apartment buildings with the bottom story height higher than the stories above
- Three- to seven-story concrete frame buildings with concrete flat slabs collapsed around urban centers of Ercis and Van.
- Pancake collapses occurred where columns of multiple levels failed.
- Weak column-beam connections and weak building materials such as understrengthed concrete hugely impacted building damage ratios
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CEDIM Forensic Earthquake Analysis Group -Turkey (Van) Earthquake – 24.10 0900CET – Report 1.pdf
CEDIM Forensic Earthquake Analysis Group -Turkey (Van) Earthquake – 24.10 0900CET — Report 4
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