Regions

Arkansas

States L2 Landing Page Tabs

World class scientists working in Southeast Region Science Centers help our partners understand and manage complex issues including competition for limited water resources, coastal hazards, mineral and energy resource extraction, degraded ecosystems, vector-borne diseases, rapidly changing land use, and response to climate change.

News

CGG RESOLVE in flight
October 25, 2018

Editor:  In the public interest and in accordance with Federal Aviation Administration regulations, the USGS is announcing this low-level airborne project.  Your assistance informing the local communities is appreciated.  

USGS: Science for a changing world
September 21, 2017

This page contains the weekly highlights from the Lower Mississippi-Gulf Water Science Center for the week of 9/112017 - 9/15/2017! Please take a look and see what we have been up to!

Image shows a geologic map of the Lower 48
August 21, 2017

A carbonatite here, a glacial moraine there, a zig-zagging fault or two, even a behemoth of a batholith. The geology of the 50 States is an enormous patchwork of varied forms, beautiful in their variance but challenging to present as a single map.

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Lower Mississippi-Gulf WSC Office Locations by State
Date Published: September 20, 2018
Status: Active

Contact Us

LMG Contacts by State:

Photo of Bird Bands in a Variety of Sizes and Types
Date Published: May 1, 2018
Status: Active

Bird Banding Laboratory

The Bird Banding Laboratory (BBL) is an integrated scientific program established in 1920 supporting the collection, archiving, management and dissemination of information from banded and marked birds in North America.  This information is used to monitor the status and trends of resident and migratory bird populations. Because birds are good indicators of the health of the environment, the...

Figure 1. The Buffalo National River in Arkansas
Date Published: October 31, 2017
Status: Active

Detecting Differences in Bacterial Metabolism in the Buffalo National River

Each year, the Buffalo National River (BUFF) attracts 1.6 million visitors, many of whom enjoy recreational water activities. Since 2013, a confined animal feeding operation (CAFO) for swine has been operating on Big Creek, a BUFF tributary.

Harvey
Date Published: August 29, 2017

Hydrologist visits 4th-graders at Baton Rouge public school

Where: Westdale Heights Academic Magnet school, Baton Rouge, LA

Background:  Dennis Demcheck has been volunteering at the public school since 2012, discussing bird identification, migration patterns, and drawing birds. The presentation emphasized scientific observation and the importance of accurate data collection.

Partners/Stakeholders: None. Dennis talked to about 75 students...

Ozark Plateaus Hydrogeologic Framework Illustration
Date Published: July 5, 2017

Ozark Plateaus Groundwater Availability Study

The U.S. Geological Survey's Groundwater Resources Program (GWRP) is conducting an assessment of groundwater availability throughout the United States to gain a better understanding of the status of the Nation's groundwater resources and how changes in water use and climate may affect those resources. 

...

Contacts: Brian R Clark
Sparta Aquifer Recovery Project Wells Map - Arkansas
Date Published: July 5, 2017

Sparta Aquifer Recovery Project

The Sparta aquifer is Union County's only source of municipal and industrial ground water. Since development began in the early 1920's ground-water levels have declined more than 390 feet in some areas. As a result, Union was among five southern Arkansas counties designated as the state's first "Critical Ground Water Area" in 1996.

Partners include:...

Photo of Beaver Lake Diagnostic System Instrument - Arkansas
Date Published: July 5, 2017

Decision Support System for Sustainable and Adaptive Management of Beaver Lake - Arkansas

Short Title: Beaver Lake 3-D Modelin

Project Chief: Reed Green

Cooperator: Beaver Water District

Project Time Frame: October 2007 - present

Beaver Lake is a large, deep-storage reservoir located in the White River Basin in northwestern Arkansas and is...

Contacts: William R Green
Map of Beaver Lake Watershed - Arkansas
Date Published: July 5, 2017

Beaver Lake Water Quantity and Quality - Arkansas

Short Title: Beaver Lake Water Quality

Project Chief: Reed Green

Cooperator: Beaver Water District

Project Time Frame: 2000 - present

Beaver Lake, completed in 1963, is located in northwestern Arkansas and receives a majority of its water from three...

Mississippi Corn Irrigation Photograph
Date Published: July 5, 2017

Ground-Water Data Network - Arkansas

Short Title: Ground-Water Data Network

Project Chief: Anna Nottmeier

Cooperators: Arkansas Natural Resources CommissionArkansas Geological Survey, ...

Hot Springs Arkansas Flood Warning System Gage Locations - Map
Date Published: July 5, 2017

Hydrologic Monitoring for the City of Hot Springs Early Flood Warning Information System - Arkansas

Short Title: Hot Springs Flood Warning System

Project Chief: Joseph Fleming

Cooperator: City of Hot Springs

Project Time Frame: 2008- present

In May 1990, a series of severe thunderstorms developed in the vicinity of Hot Springs with a total...

Ozark forest photograph - Arkansas
Date Published: July 3, 2017

Lakes Maumelle and Winona - Arkansas

Short Title: Lakes Maumelle and Winona

Project Chief: William Green

Cooperator: Central Arkansas Water

Project Time Frame: 1989 - present

Lakes Maumelle and Winona are water-supply reservoirs for the Little Rock and North Little Rock metropolitan areas...

Contacts: William R Green
Middle Fork Saline River - Arkansas Map
Date Published: July 3, 2017

Middle Fork of the Saline River - Arkansas

Short Title: Middle Fork Study

Project Chief: William Baldwin

Cooperators: Hot Springs Village Property Owners Association, Arkansas Department of Environmental Quality, Arkansas Game and Fish Commission,Arkansas Naural Resources Commission, U.S. Bureau of Land Management, and U.S. Fish and Wildlife Service...

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Real-time Data
/data-tools/current-conditions-arkansas-streamflow

Current Conditions for Arkansas - Streamflow

Arkansas Current Water Conditions Image
October 31, 2017

To view current streamflow conditions for Arkansas click here

Real-time Data
/data-tools/current-conditions-arkansas-water-quality

Current Conditions for Arkansas: Water Quality

Illustration of the National Water Quality Network on U.S. map
October 31, 2017

To view current conditions for Arkansas Water Quality click here.

Real-time Data
/data-tools/arkansas-groundwater-quality-network

Arkansas Groundwater-Quality Network

Groundwater Well in rice field - Arkansas photograph
October 31, 2017

To see information on the Arkansas Groundwater-Quality Network click here.

Water
/data-tools/national-water-information-system-web-interface-nwisweb-0

National Water Information System web interface (NWISweb)

Application screenshot thumbnail
September 1, 2017

The National Water Information System (NWIS) web application provides access to real-time and historical surface-water, groundwater, water-quality, and water-use data collected at approximately 1.5 million sites across all 50 states.

Web Application
/data-tools/national-water-information-system-nwis-mapper

National Water Information System (NWIS) Mapper

NWIS Mapper screenshot
August 30, 2017

The NWIS mapper provides access to over 1.5 million sites contained in the USGS National Water Information System (NWIS), including sites where current and historical surface-water, groundwater, springs, and atmospheric data has been collected. Users can search by site type, data type, site number, or place.

Real-time Data
/data-tools/real-time-water-use-sites-arkansas

Real-time Water Use Sites - Arkansas

Arkansas water use database surface water
July 7, 2017

To view real-time water use sites for Arkansas click here.

Real-time Data
/data-tools/real-time-sediment-concentrations-arkansas

Real Time Sediment Concentrations - Arkansas

Sediment Sampling - Mississippi River - Arkansas photograph
July 7, 2017

To view real time sediment concentrations for Arkansas click here.

Real-time Data
/data-tools/real-time-nitrate-readings-arkansas

Real Time Nitrate Readings - Arkansas

Lab photograph - Arkansas
July 7, 2017

To see real time nitrate readings for Arkansas click here.

Real-time Data
/data-tools/arkansas-water-quality-mapper

Arkansas Water Quality Mapper

Arkansas Water Quality Mapper GIS Image
July 7, 2017

To view the Arkansas Water Quality Mapper GIS interactive map click here.

Real-time Data
/data-tools/arkansas-streamstats

Arkansas StreamStats

Arkansas StreamStats Interactive Map
July 7, 2017

To see detailed information on Arkansas StreamStats as well as an interactive map click here.

Real-time Data
/data-tools/arkansas-sparta-recovery-groundwater-network

Arkansas Sparta Recovery Groundwater Network

Arkansas Sparta Recovery Groundwater Network Map
July 7, 2017

To see site information for the Arkansas Sparta Recovery Groundwater Network click here.

Real-time Data
/data-tools/arkansas-northern-lonoke-county-groundwater-network

Arkansas Northern Lonoke County Groundwater Network

Arkansas Northern Lonoke County Groundwater Network Map
July 7, 2017

To see the map and site information for the Arkansas Northern Lonoke County Groundwater Network click here.

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Buffalo River Map Screen Capture
September 14, 2016

Real-time displays of current floating conditions at various sites along the Arkansas Buffalo River. 

MAP study area
September 14, 2016

Subsurface geometry of the Mississippi Embayment Regional Aquifer Study (MERAS)

Digital Elevation Model in the Atchafalaya Basin, LA
April 19, 2016

The 3DEP products and services available through The National Map consist of standard digital elevation models (DEMs) at various horizontal resolutions, elevation source and associated datasets, an elevation point query service and bulk point query service. All 3DEP products are available, free of charge and without use restrictions.

Arkansas Map Thumbnail
January 1, 2014

The Arkansas Groundwater - Quality Network is a web map interface that provides rapid access to the U.S. Geological Survey's (USGS) NWIS and the U.S. Environmental Protection Agency's (EPA) STORET databases of ambient groundwater information. The interface enables users to perform simple graphical analysis and download selected water-quality data. 

Sparta Aquifer Monitoring and Sampling Map - AR/LA
November 10, 2003

The Union County Water Conservation Board with funding from the U.S. Environmental Protection Agency began a study in 2003 with the U.S. Geological Survey, the Union County Conservation District, Burns & McDonnell to monitor the impact of water-level recovery and water-quality characteristics of the Sparta aquifer system in southern Arkansas and northern Louisiana.

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Year Published: 2018

Flooding in the southern Midwestern United States, April–May 2017

Excessive rainfall resulted in flooding on numerous rivers throughout the southern Midwestern United States (southern Midwest) in late April and early May of 2017. The heaviest rainfall, between April 28 and 30, resulted in extensive flooding from eastern Oklahoma to southern Indiana including parts of Missouri, Arkansas, and Illinois.Peak-of-...

Heimann, David C.; Holmes, Robert R.; Harris, Thomas E.
Heimann, D.C., Holmes, R.R., Jr., and Harris, T.E., 2018, Flooding in the southern Midwestern United States, April–May 2017: U.S. Geological Survey Open-File Report 2018–1004, 36 p., https://doi.org/10.3133/ofr20181004.

Year Published: 2016

St. Louis area earthquake hazards mapping project; seismic and liquefaction hazard maps

We present probabilistic and deterministic seismic and liquefaction hazard maps for the densely populated St. Louis metropolitan area that account for the expected effects of surficial geology on earthquake ground shaking. Hazard calculations were based on a map grid of 0.005°, or about every 500 m, and are thus higher in resolution than any...

Cramer, Chris H.; Bauer, Robert A.; Chung, Jae-won; Rogers, David; Pierce, Larry; Voigt, Vicki; Mitchell, Brad; Gaunt, David; Williams, Robert; Hoffman, David; Hempen, Gregory L.; Steckel, Phyllis; Boyd, Oliver S.; Watkins, Connor M.; Tucker, Kathleen; McCallister, Natasha
Cramer C.H., Bauer R.A., Chung J.-W., Rogers J.D., Pierce L., Voigt V., Mitchell B., Gaunt D., Williams R.A., Hoffman D., Hempen G.L., Steckel P.J., Boyd O.S., Watkins C.M., Tucker K., McCallister N.S. St. Louis area earthquake hazards mapping project; seismic and liquefaction hazard maps Seismological Research Letters, January, 2017, Vol. 88, Issue 1, pp. 206-223

Year Published: 2016

Preliminary assessment of a previously unknown fault zone beneath the Daytona Beach sand blow cluster near Marianna, Arkansas

We collected new high‐resolution P‐wave seismic‐reflection data to explore for possible faults beneath a roughly linear cluster of early to mid‐Holocene earthquake‐induced sand blows to the south of Marianna, Arkansas. The Daytona Beach sand blow deposits are located in east‐central Arkansas about 75 km southwest of Memphis, Tennessee, and...

Odum, Jackson K.; Williams, Robert; Stephenson, William J.; Tuttle, Martitia P.; Al-Shukri, Hadar

Year Published: 2016

Dense lower crust elevates long-term earthquake rates in the New Madrid seismic zone

Knowledge of the local state of stress is critical in appraising intraplate seismic hazard. Inverting earthquake moment tensors, we demonstrate that principal stress directions in the New Madrid seismic zone (NMSZ) differ significantly from those in the surrounding region. Faults in the NMSZ that are incompatible with slip in the regional stress...

Levandowski, William Brower; Boyd, Oliver S.; Ramirez-Guzman, Leonardo
Levandowski, W., O. S. Boyd, and L. Ramirez-Guzmán (2016), Dense lower crust elevates long-term earthquake rates in the New Madrid seismic zone, Geophys. Res. Lett., 43, doi:10.1002/2016GL070175.

Year Published: 2016

Historical files from Federal Government mineral exploration-assistance programs, 1950 to 1974

The Defense Minerals Administration (DMA), Defense Minerals Exploration Administration (DMEA), and Office of Minerals Exploration (OME) mineral exploration programs were active over the period 1950–1974. Under these programs, the Federal Government contributed financial assistance in the exploration for certain strategic and critical minerals. The...

Frank, David G.
Frank, D.G., 2016, Historical files from Federal Government mineral exploration-assistance programs, 1950 to 1974: U.S. Geological Survey Data Series 1004, http://dx.doi.org/10.3133/ds1004.

Year Published: 2016

Hydrologic effects on diameter growth phenology for Celtis laevigata and Quercus lyrata in the floodplain of the lower White River, Arkansas

Bottomland hardwood (BLH) forests represent an extensive wetland system in the Mississippi Alluvial Valley and southeastern USA, and it is currently undergoing widespread transition in species composition. One such transition involves increased establishment of sugarberry (Celtis laevigata), and decreased establishment of overcup oak (Quercus...

Schweitzer, Callie Jo; Clatterbuck, Wayne K.; Oswalt, Christopher M.; Allen, Scott T.; Cochran, Wesley; Krauss, Ken W.; Keim, Richard F.; King, Sammy L.
Allen, S.T., Cochran, J.W., Krauss, K.W., Keim, R.F., and King, S.L., 2016, Hydrologic effects on diameter growth phenology for Celtis laevigata and Quercus lyrata in the floodplain of the lower White River, Arkansas: in Schweitzer, C.J., Clatterbuck, W.K., and Oswalt, C.M., eds., Proceedings of the 18th Biennial Southern Silvicultural Research Conference, USDA Forest Service General Technical Report SRS-212, p. 273-279: Asheville, N.C.

Year Published: 2015

Ground motion-simulations of 1811-1812 New Madrid earthquakes, central United States

We performed a suite of numerical simulations based on the 1811–1812 New Madrid seismic zone (NMSZ) earthquakes, which demonstrate the importance of 3D geologic structure and rupture directivity on the ground‐motion response throughout a broad region of the central United States (CUS) for these events. Our simulation set consists of 20...

Ramirez-Guzman, L.; Graves, Robert; Olsen, Kim B.; Boyd, Oliver S.; Cramer, Chris H.; Hartzell, Stephen; Ni, Sidao; Somerville, Paul G.; Williams, Robert; Zhong, Jinquan

Year Published: 2015

Crustal deformation in the New Madrid seismic zone and the role of postseismic processes

Global Navigation Satellite System data across the New Madrid seismic zone (NMSZ) in the central United States over the period from 2000 through 2014 are analyzed and modeled with several deformation mechanisms including the following: (1) creep on subsurface dislocations, (2) postseismic frictional afterslip and viscoelastic relaxation from the...

Boyd, Oliver S.; Robert Smalley, Jr; Zeng, Yuehua
Boyd, O. S., R. Smalley Jr., and Y. Zeng (2015), Crustal deformation in the New Madrid seismic zone and the role of postseismic processes, J. Geophys. Res. Solid Earth, 120, doi:10.1002/2015JB012049.

Year Published: 2015

Estimated water use in Arkansas, 2010

The Arkansas Natural Resources Commission (ANRC) conducts an annual inventory of reported groundwater and surface-water withdrawals in Arkansas in cooperation with the U.S. Geological Survey (USGS). This report describes withdrawals from groundwater and surface-water resources in Arkansas for 2010. The report compiles withdrawals by county for 10...

Pugh, Aaron L.; Holland, Terrance W.
Pugh, A.L., and Holland, T.W., 2015, Estimated water use in Arkansas, 2010: U.S. Geological Survey Scientific Investigations Report 2015–5062, 33 p., http://dx.doi.org/10.3133/sir20155062. ISSN 2328-0328 (online)

Year Published: 2014

Why the New Madrid earthquakes are M 7–8 and the Charleston earthquake is ∼M 7

Estimates of magnitudes of large historical earthquakes are an essential input to and can seriously affect seismic‐hazard estimates. The earthquake‐intensity observations, modified Mercalli intensities (MMI), and assigned magnitudes Mof the 1811–1812 New Madrid events have been reinterpreted several times in the last decade and have...

Cramer, Chris H.; Boyd, Oliver S.
Cramer, C. H., and O. S. Boyd (2014), Why the New Madrid Earthquakes are M7–8 and the Charleston Earthquake is ~M7, Bull. Seis. Soc. Am., 104, 2884–2903, doi:10.1785/0120120257.

Year Published: 2013

Workshop on New Madrid geodesy and the challenges of understanding intraplate earthquakes

On March 4, 2011, 26 researchers gathered in Norwood, Massachusetts, for a workshop sponsored by the U.S. Geological Survey and FM Global to discuss geodesy in and around the New Madrid seismic zone (NMSZ) and its relation to earthquake hazard. The group addressed the challenge of reconciling current geodetic measurements, which show low present-...

Boyd, Oliver; Calais, Eric; Langbein, John; Magistrale, Harold; Stein, Seth; Zoback, Mark
Workshop on New Madrid geodesy and the challenges of understanding intraplate earthquakes; 2013; OFR; 2013-1004; Boyd, Oliver ; Calais, Eric ; Langbein, John ; Magistrale, Harold ; Stein, Seth ; Zoback, Mark

Year Published: 2012

Magnitude Estimates of M7.3-7.8 for the 1811-1812 New Madrid and M7.0 for the 1886 Charleston Earthquakes from a Monte Carlo Analysis of Mean MMIs

No abstract available

Cramer, Chris H.; Boyd, Oliver S.
Magnitude Estimates of M7.3-7.8 for the 1811-1812 New Madrid and M7.0 for the 1886 Charleston Earthquakes from a Monte Carlo Analysis of Mean MMIs; 2012; Conference publication; Conference publication; Eastern Section‐SSA 2012 Meeting Report; Cramer, Chris H.; Boyd, Oliver S.

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Water Use Site Retrieval Page Icon
July 4, 2016

In 1977, the Congress of the United States recognized the need for uniform, current, and reliable information on water use and directed the U.S. Geological Survey (USGS) to establish a National Water-Use Information Program (NWUIP) to complement the Survey's data on the availability and quality of the Nations water resources.

Image: Public Wells
August 14, 1996

Water Well Constrution Reports entered online. 

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Image from an application that navigates users through USGS National Oil and Gas Assessment Provinces
November 14, 2018

National Oil and Gas Assessment Provinces

This is a graphic from the USGS National Oil and Gas Assessment Explorer application, which allows user to drill into 70 oil and gas assessment provinces throughout the United States.

September 20, 2018

Habitat Connectivity: Assessing Threats and IDing Conservation Actions

An important conservation strategy for climate change is to enhance and maintain regional habitat connectivity for the long-term viability of wildlife populations. Modeling habitat connectivity for wildlife species often results in a mapped network of linkages between habitat patches. A critical next step is to determine which of those linkages are priorities for

...
Attribution: Land Resources
Real-time flow meter on an Arkansas irrigation well
May 16, 2018

Real-time flow meter on an Arkansas irrigation well

Real-time flow meter installed on a center-pivot irrigation well in Mississippi County, Arkansas as part of a cooperative project conducted between USGS and the Arkansas Natural Resources Commission. The meter will measure water use for irrigation, providing data which will help improve water-use information in other locations as well.

December 31, 2017

Groundwater use from the Ozark Plateaus aquifer system, 1900 to 2010

Groundwater use from the Ozark Plateaus aquifer system, 1900 to 2010” is a short video showing modeled groundwater withdrawal rates from the Ozark Plateaus aquifer system (Ozark system) in the central United States. The Ozark Plateaus Groundwater Availability Study aims to quantify current groundwater resources in the Ozark system, evaluate how these resources have changed

...
August 7, 2017

Developing Effective Drought Monitoring Tools for Farmers and Ranchers

This webinar was conducted on August 7, 2017 as part of the USGS National Climate Change and Wildlife Science Center’s Climate Change Science and Management Webinar Series, held in partnership with the USFWS National Conservation Training Center. 

Webinar Summary: The South Central U.S. is one of the main agricultural regions in North America: annual agricultural

...
Image shows sand in a hand
December 31, 2015

Frac Sands in Hand

Frac sands used in unconventional oil and gas development.

April 6, 2015

Groundwater, A Source To Streams in the Ozark Plateaus

Groundwater or surface water interaction in the Ozark Plateaus aquifer system. Includes examples of thermal imagery used to see groundwater entering streams.

USGS Scientist collecting water samples in a stream
December 31, 2014

USGS Scientist collecting water samples in North Sylamore Creek, Arkansas

USGS scientist collecting water samples and measuring water field properties at North Sylamore Creek, Arkansas, on January 7, 2014. Water samples were analyzed for over 700 chemicals and a wide range of biological activity and toxicity.

Arkansas River at Dardanelle, Arkansas, during low-flow conditions on September 29, 2012
September 29, 2012

low-flow conditions on Arkansas River at Dardanelle, Arkansas

Arkansas River at Dardanelle, Arkansas, during low-flow conditions on September 29, 2012. Photograph by Daniel M. Wagner, U.S. Geological Survey.

Attribution: Water Resources
Arkansas Pruitt Gage
October 4, 2011

Pruitt Gage

Pruitt Buffalo National River

Flood of May 3, 2011, at USGS streamflow-gaging station 07069000, Black River at Pocahontas, Arkansas.
May 3, 2011

Flood of May 3, 2011, Black River at Pocahontas, Ark., SIR 2016–5081

Flood of May 3, 2011, at USGS streamflow-gaging station 07069000, Black River at Pocahontas, Arkansas. Photograph by D.M. Wagner, Lower Mississippi-Gulf Water Science Center.

USGS streamflow-gaging station 07069000, Black River at Pocahontas, Arkansas
May 3, 2011

Flood at USGS station 07069000, Black River at Pocahontas, Ark.

Flood of May 3, 2011, at USGS streamflow-gaging station 07069000, Black River at Pocahontas, Arkansas. Photograph by D.M. Wagner, Lower Mississippi-Gulf Water Science Center.

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CGG RESOLVE in flight
October 25, 2018

Editor:  In the public interest and in accordance with Federal Aviation Administration regulations, the USGS is announcing this low-level airborne project.  Your assistance informing the local communities is appreciated.  

USGS: Science for a changing world
September 21, 2017

This page contains the weekly highlights from the Lower Mississippi-Gulf Water Science Center for the week of 9/112017 - 9/15/2017! Please take a look and see what we have been up to!

Image shows a geologic map of the Lower 48
August 21, 2017

A carbonatite here, a glacial moraine there, a zig-zagging fault or two, even a behemoth of a batholith. The geology of the 50 States is an enormous patchwork of varied forms, beautiful in their variance but challenging to present as a single map.

Two men collecting groundwater samples at a public well in the middle of a grassy field in Texas
May 31, 2017

Decades or longer may be needed to fully assess the effects of unconventional oil and gas production on the quality of groundwater used for drinking water in Arkansas, Louisiana, and Texas

Map of the 48 contiguous states showing Microcystin concentrations
May 31, 2016

First-of-its-kind survey shows that algal toxins are found nationwide

USGS
January 15, 2016

Significant flood peaks occurred across the Arkansas, White and Red River Basins in Arkansas beginning on Dec. 26 and the rivers are still high, according to the U.S. Geological Survey.

Image: USGS Measures Historic Flooding Across the Nation
January 4, 2016

U.S. Geological Survey field crews are measuring record flooding on rivers and streams in 12 states across the country. USGS is making preparations for a prolonged field effort along the Ohio and Mississippi Rivers as major flooding will extend well into mid-to-late January, particularly along the lower Mississippi River.

Hydrograph of White River at Augusta, Arkansas, December 24-31, 2015. Left side shows Gage height 31-36 feet. Bottom is days.
December 31, 2015

Heavy rainfall of up to 10 inches in northern and western Arkansas that fell during the Christmas weekend is still causing major flooding in some areas.

USGS
December 1, 2015

A newly published, three-volume “Remote Sensing Handbook” is a comprehensive coverage of all remote sensing topics written by over 300 leading global experts.

Graph: Peak ground-motion variability for a magnitude 7.7 earthquake
July 30, 2015

Computer simulations of earthquake shaking, replicating the quakes that occurred in 1811-1812 in the New Madrid seismic zone (NMSZ), indicate that future large earthquakes there would produce major, prolonged ground shaking.

Crowdsourced Earthquake Warnings illustration
April 10, 2015

MENLO PARK, Calif.— Smartphones and other personal electronic devices could, in regions where they are in widespread use, function as early warning systems for large earthquakes according to newly reported research.

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