Science Features
A USGS ShakeMap shows the intensity of shaking caused by the earthquake in eastern Turkey on October 23, 2011
A magnitude-7.2 earthquake struck 12 miles northeast of the city of Van in eastern Turkey on Sunday, October 23, 2011, at 1:41 p.m. local time at the epicenter (time in other time zones).
The earthquake occurred at a depth of 12.4 miles and caused strong shaking throughout a broad area, causing significant damage to Van and neighboring towns.
The current version of the USGS Prompt Assessment of Global Earthquakes for Response (PAGER) estimate is that economic losses are most likely to be in the $1–10 billion range, and fatalities are equally likely to be in the 100–1,000 or the 1,000–10,000 range.
Did You Feel It? Individuals report on the intensity of shaking
The earthquake struck in the eastern part of Turkey near the borders with Iran and Iraq. As of this writing, 325 people in 138 cities throughout Turkey, Iran, Iraq, Georgia, Syria, and the surrounding region had responded on the USGS Did You Feel It? website.
History of strong earthquakes
Turkey is a tectonically active country that experiences frequent destructive earthquakes. This earthquake is a reminder of the many deadly seismic events that Turkey has suffered in the recent past.
Tectonics of this earthquake
On a broad scale, earthquakes in this region are controlled by the collision of the Arabian Plate and Eurasian tectonic plates. At the latitude of this event, the Arabian plate converges with Eurasia in a northerly direction at a rate of approximately 24 millimeters per year.
In the area of Lake Van and further east, tectonic activity is dominated by the Bitlis Suture Zone (in eastern Turkey) and Zagros fold and thrust belt (which extends toward Iran). This earthquake occurred beyond the eastern extent of Anatolian strike-slip faulting, which is similar to the San Andreas Fault in California. The focal mechanism of this earthquake is consistent with oblique-thrust faulting similar to mapped faults in the region.
For the most recent information on this earthquake, maps, and scientific and technical information, visit Magnitude 7.2 – Eastern Turkey.
Flash animation of a strike-slip fault
Flash animation of a thrust fault
While Hurricane Isaac has passed, scientific work to understand the storm’s impact on Gulf Coast states continues. Read more
A magnitude 7.6 earthquake struck near the west coast of Costa Rica on September 5, 2012 at 14:42:10 UTC. Read more
Real-time map showing the extent of flooding (black dots) and drought (red dots) in the U.S. Read more
USGS scientists, engineers, and technicians are working along the Gulf coast in response to Hurricane Isaac. Read more
USGS scientists are providing up-to-date information. Read more
The U.S. Geological Survey is keeping careful watch as Tropical Storm Isaac continues to track northwest toward the west coast of Florida and the Gulf of Mexico. Read more
It was one of the largest recorded earthquakes to occur in the east over the last century. Find out what scientists have learned in the past year. Read more
USGS scientists improve systems to monitor and forecast volcanic activity and track volcanic ash to help communities prepare. Read more
These 3 young scientists have forged ahead with innovative research at the frontiers of science. Learn more
The majority of the nation is facing dry conditions; in most areas drought conditions are expected to persist or intensify. Read more
The new “Did You See It?” website collects citizen observations of landslides. Read more
Please comment on the USGS’ draft science strategies! Read more
Citizen volunteers, portable instruments, and real-time maps help improve gathering of and access to earthquake data.Read more
The USGS and partners are designing an earthquake early warning system for California to help save lives and property.
Science or Soundbite? Is the recent increase in midcontinent earthquakes natural or man-made? Find out here.
Timing is everything! Consider helping track changes in spring’s arrival
A magnitude-8.6 earthquake struck off the west coast of northern Sumatra Wednesday, April 11, 2012, at 8:38 a.m., UTC at the epicenter.
A magnitude-7.4 earthquake struck in the Mexican state of Oaxaca Tuesday, March 20, 2012, at 12:02 p.m., local time at the epicenter.
Flood Safety Awareness Week is March. 12-16. What can you do to prepare?
National Groundwater Awareness Week is Mar. 11-17, 2012. See how USGS science is connecting groundwater and surface water.
Since Japan’s March 11, 2011, Tohoku earthquake and subsequent tsunami, scientists at the USGS have learned much to help better prepare for a large earthquake in the United States.
Five USGS employees honored with Distinguished Service Awards for their service to the nation
The proposed USGS budget reflects research priorities to respond to nationally relevant issues, including water quantity and quality, ecosystem restoration, hydraulic fracturing, natural disasters such as floods and earthquakes, and support for the National Ocean Policy, and has a large R&D component.
Exploding lakes in Cameroon, Africa, have killed people and livestock. Find out how USGS science is helping prevent such an event from occurring again.
Everyone is familiar with weather systems on earth like rain, wind and snow. But space weather – variable conditions in the space surrounding Earth – has important consequences for our lives inside Earth’s atmosphere.
Scientists and communities are working together to make science more useful and communities safer. What one emergency manager has to say.
Modern volcano monitoring in the United States began with the founding of the Hawaiian Volcano Observatory in 1912. Living with volcanoes
Shaking from Oklahoma's M5.6 main shock, the largest quake in the State's history, was felt from St. Louis to Lubbock. Number of quakes increasing in Oklahoma
It's only the beginning of their careers, but these 3 young scientists have forged ahead with innovative research at the frontiers of science. How they've transformed their fields
Oct. 9-15, 2011, is Earth Science Week, themed "Our-Ever Changing Earth," and Oct. 12, 2011, is International Day for Natural Disaster Reduction. Answers to questions posed by a changing world
Fire managers and the public can access online maps of current wildfire locations, thanks to a Web-based mapping application provided by the USGS and its partners.
On Feb. 7, 1812, at about 3 a.m., a third, and probably most widely felt of three major earthquakes, occurred in the central Mississippi River Valley. Similar risk today.
Rivers and streams are reaching record levels as a result of Hurricane Irene’s rainfall, with more than 80 USGS streamgages measuring record peaks.
Tuesday, August 23, 2011 at 01:51 PM a 5.8 Earthquake occurred 38 miles outside of Richmond, VA.
A new geologic map of Lassen Volcanic National Park and vicinity has been created. The map area includes the entire Lassen Volcanic Center, parts of three older volcanic centers, and the products of regional volcanism.
To better understand and reduce tsunami hazards, USGS scientists examined sediment deposited by the tsunami in and around Sendai, Japan, as part of an international tsunami survey team organized by Japanese scientific cooperators.
USGS crews continue to measure streamflow and collect water quality and sediment samples in the Ohio and Mississippi River basins using state-of-art instruments.
Many communities in South Dakota, North Dakota, Montana, Colorado, Wyoming and Iowa are dealing with record floodwaters and bracing for more flooding in the upcoming weeks.
Fire managers and the public can access online maps of current wildfire locations, thanks to a web-based mapping application provided by the USGS and its partners.
New Zealand has experienced another damaging earthquake close to the city of Christchurch, which is still recovering from the magnitude-6.1 earthquake that struck in February. This latest quake has resulted in additional damage to buildings and infrastructure.
The USGS-NASA Landsat 5 satellite captured this image of 39-mile track of destruction caused by a massive tornado on June 1 near Sturbridge, MA.
As hurricane season starts, researchers are modeling potential changes to coastal environments to identify communities vulnerable to extreme erosion during storms. Data collected before and after storm landfall are used to verify past forecasts and improve future predictions.
The effects of the March 11 magnitude 9.0 earthquake and resulting tsunami on Japan are being monitored using Landsat satellite data from the USGS.
The most recent earthquake in Japan affected water levels in groundwater wells all over the country. Water level fluctuations were recorded as far away as Illinois, Virginia, Missouri and Florida.
Volcanic activity continues in the Pu`u `O`o crater on Kilauea Volcano's east rift zone and in the Halema`uma`u Crater vent at Kilauea’s summit. Visit the USGS Hawaii Volcanoes Observatory site to get detailed Kilauea and Mauna Loa activity updates, recent volcano photos, recent earthquakes, and more.
Scientists unveil a catastrophic winter storm scenario that could possibly overwhelm California's flood protection system, and significantly disrupt Statewide social and economic systems.
Heavy rainfall could potentially destabilize hillsides. The USGS Landslide Hazards Web site has what you need to know if you live in an area prone to landslides.
The USGS and the National Weather Service have developed a new flood inundation map tool that enables management officials and residents to see where the potential threat of flooding is the highest along the Flint River near Albany, Georgia.
Volcanic eruptions have always been a part of human history; the American experience is no exception. On November 3rd, USGS’s Dr. John Eichelberger discusses new USGS programs which establish monitoring networks on all hazardous US volcanoes, to reduce the effects of volcanic hazards on communities.
Kilauea is Hawaii's youngest volcano and one of the world's most active. Get daily updates on ongoing eruptions from Kilauea's summit and east rift zone.
Looking for information on natural resources, natural hazards, geospatial data, and more? The USGS Education site provides great resources, including lessons, data, maps, and more, to support teaching, learning, K-12 education, and university-level inquiry and research.
The USGS PAGER system (Prompt Assessment of Global Earthquakes for Response) will now include estimated economic loss and casualty information. This system is used by emergency responders, government and aid officials, and the public to understand the scope of the disaster to develop the best response.
Flash flooding is one of the major causes of natural hazard-related deaths in the United States and is hard to predict, but data collected by the USGS is crucial to formulating better predictive models.
The USGS Science Strategy is a comprehensive report to critically examine the USGS's major science goals and priorities for the coming decade. The USGS is moving forward with these strategic science directions in response to the challenges that our Nation's future faces and for the stewards of our Federal lands.
In response to Hurricane Isaac, USGS has deployed several hundred storm surge sensors to collect information about the effects of Isaac on the Gulf Coast.
Join us on September 5th in Reston, VA for a free public lecture on the 2011 Virginia earthquake!
Join us on August 1 to learn more about the anatomy of flooding: What are the different causes of these extreme events, and how is USGS science helping prepare residents for future foods.
Join us on June 6 for a centennial look at the greatest volcanic eruption of the 20th century at our June Public Lecture!
In recognition of World Forestry Day, let’s take a glimpse at USGS science to understand the fate of forests from climate change.
The Volcano Hazards Program announces the establishment of the USGS California Volcano Observatory (CalVO), which expands and replaces the former Long Valley Observatory.
The U.S. Geological Survey had a very busy 2011 — below are a few of our highlights from last year.
On Nov. 3, USGS scientists Patrick Barnard and William Ellsworth will present a public lecture in Menlo Park, CA, providing Bay Area residents information about USGS research in the San Francisco Bay Area, including recent discoveries beneath San Francisco Bay and ongoing studies to better understand earthquake probabilities and the potential hazards associated with strong ground shaking.
Join USGS scientists on November 2nd to discuss the seismology of the M5.8 Virginia earthquake, its effects, and its context in the geology of Virginia.
U.S. Department of the Interior |
U.S. Geological Survey
URL: www.usgs.gov/blogs/features/usgs_top_story/earthquake-in-eastern-turkey/
Page Contact Information: Ask USGS
Page Last Modified: September 14, 2011
