This animated infographic shows how aquifer compaction can lead to land subsidence. When water is pumped from a confined aquifer faster than it can recharge, the water pressure in the aquifer begins to decrease. As water pressure decreases, both the confining layers and the aquifers themselves can start to compact under the weight of the overlying sediments.
What is the difference between a sinkhole and land subsidence?
Sinkholes are just one of many forms of ground collapse, or subsidence. Land subsidence is a gradual settling or sudden sinking of the Earth’s surface owing to subsurface movement of earth materials. The principal causes of land subsidence are aquifer-system compaction, drainage of organic soils, underground mining, hydrocompaction, natural compaction, sinkholes, and thawing permafrost. Land subsidence can affect areas that are thousands of square miles in size.
A sinkhole is a depression in the ground that has no natural external surface drainage. Basically, this means that when it rains, all of the water stays inside the sinkhole and typically drains into the subsurface. Sinkholes are most common in what geologists call, “karst terrain.” These are regions where the type of rock below the land surface can naturally be dissolved by groundwater circulating through them. Soluble rocks include salt beds and domes, gypsum, limestone and other carbonate rock.
Learn more:
- USGS Water Science School - Sinkholes
- USGS Water Science School - Subsidence
- Karst Map of the Conterminous United States - 2020
Related
How many sinkholes open up in a year?
There is no database of sinkhole collapses for the United States, so these data are unavailable. Some individual state geologic surveys track reported collapses within their state. Many sinkhole collapses are not reported to authorities or news organizations, and many occur in rural areas where they are unobserved. Learn more: USGS Water Science School - Sinkholes Karst Map of the Conterminous...
How much does sinkhole damage cost each year in the United States?
Sinkhole damages over the last 15 years cost on average at least $300 million per year. Since there is no national tracking of sinkhole damage costs, this estimate is probably much lower than the actual cost. Learn more: USGS Water Science School - Sinkholes Karst Map of the Conterminous United States - 2020
What is a sinkhole?
A sinkhole is a depression in the ground that has no natural external surface drainage. Basically, this means that when it rains, all of the water stays inside the sinkhole and typically drains into the subsurface. Sinkholes are most common in what geologists call, “ karst terrain.” These are regions where the types of rock below the land surface can naturally be dissolved by groundwater...
What is the difference between a sinkhole and a pothole?
A sinkhole is a closed natural depression in the ground surface caused by removal of material below the ground and either collapse or gradual subsidence of the surface into the resulting void. A pothole is usually a fairly small feature caused by failure of paving materials, usually associated with roads, parking lots, and airports. In the colder parts of the country, potholes become more abundant...
What is the largest sinkhole in the United States?
There are some very large, ancient, ‘inactive’ sinkholes in some areas of the U.S. that are thousands of years old. Alabama claims to have the largest recent collapse sinkhole. It is called the “Golly Hole” and is located in Shelby County in the central part of the state. It collapsed suddenly in 1972. The sinkhole is about 325 feet long, 300 feet wide, and 120 feet deep. Learn more: USGS Water...
Aquifer compaction and land subsidence
This animated infographic shows how aquifer compaction can lead to land subsidence. When water is pumped from a confined aquifer faster than it can recharge, the water pressure in the aquifer begins to decrease. As water pressure decreases, both the confining layers and the aquifers themselves can start to compact under the weight of the overlying sediments.
Land Subsidence near El Nido, CA
National Geodetic Survey vertical control bench mark H1235 RESET in Merced County, California. H 1235 RESET is in the median of State Highway 15. This is one of several bench mark locations used to help measure the largest recent subsidence in the area using repeat surveys.
National Geodetic Survey vertical control bench mark H1235 RESET in Merced County, California. H 1235 RESET is in the median of State Highway 15. This is one of several bench mark locations used to help measure the largest recent subsidence in the area using repeat surveys.
Karst, Critters, and Climate Change
This webinar was conducted as part of the Climate Change Science and Management Webinar Series, co-hosted by the USGS National Climate Change and Wildlife Science Center and the FWS National Conservation Training Center.
This webinar was conducted as part of the Climate Change Science and Management Webinar Series, co-hosted by the USGS National Climate Change and Wildlife Science Center and the FWS National Conservation Training Center.
Measuring Subsidence in the Atchafalaya Basin
As the Atchafalaya River spreads out through the Basin, the waters slow down, and the sediment falls to the river and lakebottoms. Over time, that sediment can build up, eventually choking the river or permanently closing the lake. Or, as more and more sediment piles up, it compacts, sinking deeper during a process known as subsidence.
As the Atchafalaya River spreads out through the Basin, the waters slow down, and the sediment falls to the river and lakebottoms. Over time, that sediment can build up, eventually choking the river or permanently closing the lake. Or, as more and more sediment piles up, it compacts, sinking deeper during a process known as subsidence.
PubTalk 11/2014 — Water, Nuts, and the Nation's Fruit Bowl
California's Central Valley Hydrologic Science
by Claudia Faunt, USGS Hydrologist
California's Central Valley Hydrologic Science
by Claudia Faunt, USGS Hydrologist
An Unseen World Beneath Our Feet - Caves, Sinkholes and Springs
Randall Orndorff, Director of the Eastern Geology and Paleoclimate Science Center, discusses how Karst affects daily life. Beneath a quarter of the United States are rock types that can dissolve to form caves, sinkholes and other features. Nearly every state has rock layers of limestone, gypsum, and other soluble rocks we call ‘karst’.
Randall Orndorff, Director of the Eastern Geology and Paleoclimate Science Center, discusses how Karst affects daily life. Beneath a quarter of the United States are rock types that can dissolve to form caves, sinkholes and other features. Nearly every state has rock layers of limestone, gypsum, and other soluble rocks we call ‘karst’.
Sinkholes in West-central Florida, Freeze Event of 2010
More than 110 sinkholes formed in the Dover area of Florida during a freeze event in January 2010. Ground water levels dropped to record-setting lows as farmers pumped water to irrigate their plants for protection from the cold temperatures. The sinkholes destroyed homes, roads and sections of cultivated areas.
More than 110 sinkholes formed in the Dover area of Florida during a freeze event in January 2010. Ground water levels dropped to record-setting lows as farmers pumped water to irrigate their plants for protection from the cold temperatures. The sinkholes destroyed homes, roads and sections of cultivated areas.
Sinkholes in West-central Florida, Freeze Event of 2010
More than 110 sinkholes formed in the Dover area of Florida during a freeze event in January 2010. Ground water levels dropped to record-setting lows as farmers pumped water to irrigate their plants for protection from the cold temperatures. The sinkholes destroyed homes, roads and sections of cultivated areas.
More than 110 sinkholes formed in the Dover area of Florida during a freeze event in January 2010. Ground water levels dropped to record-setting lows as farmers pumped water to irrigate their plants for protection from the cold temperatures. The sinkholes destroyed homes, roads and sections of cultivated areas.
Sinkhole Activity Damages Home.
Cracking along exterior walls is a sign of subsidence activity. Such severe structural damage from sinkholes can destroy homes and other structures.
Cracking along exterior walls is a sign of subsidence activity. Such severe structural damage from sinkholes can destroy homes and other structures.
Sinkholes in West-central Florida, Freeze Event of 2010
More than 110 sinkholes formed in the Dover area of Florida during a freeze event in January 2010. Ground water levels dropped to record-setting lows as farmers pumped water to irrigate their plants for protection from the cold temperatures. The sinkholes destroyed homes, roads and sections of cultivated areas.
More than 110 sinkholes formed in the Dover area of Florida during a freeze event in January 2010. Ground water levels dropped to record-setting lows as farmers pumped water to irrigate their plants for protection from the cold temperatures. The sinkholes destroyed homes, roads and sections of cultivated areas.
What's Up With Sinkholes?
A huge sinkhole in Texas begs a few questions about this fascinating and sometimes hazardous phenomenon, so we sit down with USGS geologist Randy Orndorff to learn more.
A huge sinkhole in Texas begs a few questions about this fascinating and sometimes hazardous phenomenon, so we sit down with USGS geologist Randy Orndorff to learn more.
Various Karst Features Along Peace River, Fl
Observing the small amount of flow going into Dover Sink.
Observing the small amount of flow going into Dover Sink.
Various Karst Features Along Peace River, Fl
Monitoring levels at Gator Sink.
Monitoring levels at Gator Sink.
Various Karst Features Along Peace River, Fl
Crevasses Sink spans approximately 25 ft across the river bed.
Crevasses Sink spans approximately 25 ft across the river bed.
Winter Park Florida Sinkhole of 1981
Photo 2 of 15: Cars and house in a sinkhole. Auto mechanic’s garage intact. View to south across the sinkhole.
Photo 2 of 15: Cars and house in a sinkhole. Auto mechanic’s garage intact. View to south across the sinkhole.
Winter Park Florida Sinkhole of 1981
Photo 9 of 15: Community pool collapsing into sinkhole at. Pool was roughly Olympic-sized and was about half full at the time of collapse. Impressive sounds of the rebar and concrete snapping, then the rush of water. View to north across the sinkhole. (1:30 p.m)
Photo 9 of 15: Community pool collapsing into sinkhole at. Pool was roughly Olympic-sized and was about half full at the time of collapse. Impressive sounds of the rebar and concrete snapping, then the rush of water. View to north across the sinkhole. (1:30 p.m)
Winter Park Florida Sinkhole of 1981
Photo 5 of 15: House in a sinkhole. View to east across the sinkhole.
Photo 5 of 15: House in a sinkhole. View to east across the sinkhole.
Related
How many sinkholes open up in a year?
There is no database of sinkhole collapses for the United States, so these data are unavailable. Some individual state geologic surveys track reported collapses within their state. Many sinkhole collapses are not reported to authorities or news organizations, and many occur in rural areas where they are unobserved. Learn more: USGS Water Science School - Sinkholes Karst Map of the Conterminous...
How much does sinkhole damage cost each year in the United States?
Sinkhole damages over the last 15 years cost on average at least $300 million per year. Since there is no national tracking of sinkhole damage costs, this estimate is probably much lower than the actual cost. Learn more: USGS Water Science School - Sinkholes Karst Map of the Conterminous United States - 2020
What is a sinkhole?
A sinkhole is a depression in the ground that has no natural external surface drainage. Basically, this means that when it rains, all of the water stays inside the sinkhole and typically drains into the subsurface. Sinkholes are most common in what geologists call, “ karst terrain.” These are regions where the types of rock below the land surface can naturally be dissolved by groundwater...
What is the difference between a sinkhole and a pothole?
A sinkhole is a closed natural depression in the ground surface caused by removal of material below the ground and either collapse or gradual subsidence of the surface into the resulting void. A pothole is usually a fairly small feature caused by failure of paving materials, usually associated with roads, parking lots, and airports. In the colder parts of the country, potholes become more abundant...
What is the largest sinkhole in the United States?
There are some very large, ancient, ‘inactive’ sinkholes in some areas of the U.S. that are thousands of years old. Alabama claims to have the largest recent collapse sinkhole. It is called the “Golly Hole” and is located in Shelby County in the central part of the state. It collapsed suddenly in 1972. The sinkhole is about 325 feet long, 300 feet wide, and 120 feet deep. Learn more: USGS Water...
Aquifer compaction and land subsidence
This animated infographic shows how aquifer compaction can lead to land subsidence. When water is pumped from a confined aquifer faster than it can recharge, the water pressure in the aquifer begins to decrease. As water pressure decreases, both the confining layers and the aquifers themselves can start to compact under the weight of the overlying sediments.
This animated infographic shows how aquifer compaction can lead to land subsidence. When water is pumped from a confined aquifer faster than it can recharge, the water pressure in the aquifer begins to decrease. As water pressure decreases, both the confining layers and the aquifers themselves can start to compact under the weight of the overlying sediments.
Land Subsidence near El Nido, CA
National Geodetic Survey vertical control bench mark H1235 RESET in Merced County, California. H 1235 RESET is in the median of State Highway 15. This is one of several bench mark locations used to help measure the largest recent subsidence in the area using repeat surveys.
National Geodetic Survey vertical control bench mark H1235 RESET in Merced County, California. H 1235 RESET is in the median of State Highway 15. This is one of several bench mark locations used to help measure the largest recent subsidence in the area using repeat surveys.
Karst, Critters, and Climate Change
This webinar was conducted as part of the Climate Change Science and Management Webinar Series, co-hosted by the USGS National Climate Change and Wildlife Science Center and the FWS National Conservation Training Center.
This webinar was conducted as part of the Climate Change Science and Management Webinar Series, co-hosted by the USGS National Climate Change and Wildlife Science Center and the FWS National Conservation Training Center.
Measuring Subsidence in the Atchafalaya Basin
As the Atchafalaya River spreads out through the Basin, the waters slow down, and the sediment falls to the river and lakebottoms. Over time, that sediment can build up, eventually choking the river or permanently closing the lake. Or, as more and more sediment piles up, it compacts, sinking deeper during a process known as subsidence.
As the Atchafalaya River spreads out through the Basin, the waters slow down, and the sediment falls to the river and lakebottoms. Over time, that sediment can build up, eventually choking the river or permanently closing the lake. Or, as more and more sediment piles up, it compacts, sinking deeper during a process known as subsidence.
PubTalk 11/2014 — Water, Nuts, and the Nation's Fruit Bowl
California's Central Valley Hydrologic Science
by Claudia Faunt, USGS Hydrologist
California's Central Valley Hydrologic Science
by Claudia Faunt, USGS Hydrologist
An Unseen World Beneath Our Feet - Caves, Sinkholes and Springs
Randall Orndorff, Director of the Eastern Geology and Paleoclimate Science Center, discusses how Karst affects daily life. Beneath a quarter of the United States are rock types that can dissolve to form caves, sinkholes and other features. Nearly every state has rock layers of limestone, gypsum, and other soluble rocks we call ‘karst’.
Randall Orndorff, Director of the Eastern Geology and Paleoclimate Science Center, discusses how Karst affects daily life. Beneath a quarter of the United States are rock types that can dissolve to form caves, sinkholes and other features. Nearly every state has rock layers of limestone, gypsum, and other soluble rocks we call ‘karst’.
Sinkholes in West-central Florida, Freeze Event of 2010
More than 110 sinkholes formed in the Dover area of Florida during a freeze event in January 2010. Ground water levels dropped to record-setting lows as farmers pumped water to irrigate their plants for protection from the cold temperatures. The sinkholes destroyed homes, roads and sections of cultivated areas.
More than 110 sinkholes formed in the Dover area of Florida during a freeze event in January 2010. Ground water levels dropped to record-setting lows as farmers pumped water to irrigate their plants for protection from the cold temperatures. The sinkholes destroyed homes, roads and sections of cultivated areas.
Sinkholes in West-central Florida, Freeze Event of 2010
More than 110 sinkholes formed in the Dover area of Florida during a freeze event in January 2010. Ground water levels dropped to record-setting lows as farmers pumped water to irrigate their plants for protection from the cold temperatures. The sinkholes destroyed homes, roads and sections of cultivated areas.
More than 110 sinkholes formed in the Dover area of Florida during a freeze event in January 2010. Ground water levels dropped to record-setting lows as farmers pumped water to irrigate their plants for protection from the cold temperatures. The sinkholes destroyed homes, roads and sections of cultivated areas.
Sinkhole Activity Damages Home.
Cracking along exterior walls is a sign of subsidence activity. Such severe structural damage from sinkholes can destroy homes and other structures.
Cracking along exterior walls is a sign of subsidence activity. Such severe structural damage from sinkholes can destroy homes and other structures.
Sinkholes in West-central Florida, Freeze Event of 2010
More than 110 sinkholes formed in the Dover area of Florida during a freeze event in January 2010. Ground water levels dropped to record-setting lows as farmers pumped water to irrigate their plants for protection from the cold temperatures. The sinkholes destroyed homes, roads and sections of cultivated areas.
More than 110 sinkholes formed in the Dover area of Florida during a freeze event in January 2010. Ground water levels dropped to record-setting lows as farmers pumped water to irrigate their plants for protection from the cold temperatures. The sinkholes destroyed homes, roads and sections of cultivated areas.
What's Up With Sinkholes?
A huge sinkhole in Texas begs a few questions about this fascinating and sometimes hazardous phenomenon, so we sit down with USGS geologist Randy Orndorff to learn more.
A huge sinkhole in Texas begs a few questions about this fascinating and sometimes hazardous phenomenon, so we sit down with USGS geologist Randy Orndorff to learn more.
Various Karst Features Along Peace River, Fl
Observing the small amount of flow going into Dover Sink.
Observing the small amount of flow going into Dover Sink.
Various Karst Features Along Peace River, Fl
Monitoring levels at Gator Sink.
Monitoring levels at Gator Sink.
Various Karst Features Along Peace River, Fl
Crevasses Sink spans approximately 25 ft across the river bed.
Crevasses Sink spans approximately 25 ft across the river bed.
Winter Park Florida Sinkhole of 1981
Photo 2 of 15: Cars and house in a sinkhole. Auto mechanic’s garage intact. View to south across the sinkhole.
Photo 2 of 15: Cars and house in a sinkhole. Auto mechanic’s garage intact. View to south across the sinkhole.
Winter Park Florida Sinkhole of 1981
Photo 9 of 15: Community pool collapsing into sinkhole at. Pool was roughly Olympic-sized and was about half full at the time of collapse. Impressive sounds of the rebar and concrete snapping, then the rush of water. View to north across the sinkhole. (1:30 p.m)
Photo 9 of 15: Community pool collapsing into sinkhole at. Pool was roughly Olympic-sized and was about half full at the time of collapse. Impressive sounds of the rebar and concrete snapping, then the rush of water. View to north across the sinkhole. (1:30 p.m)
Winter Park Florida Sinkhole of 1981
Photo 5 of 15: House in a sinkhole. View to east across the sinkhole.
Photo 5 of 15: House in a sinkhole. View to east across the sinkhole.
Updated Date: April 2, 2025