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Idaho

Our biologists work with Preserve staff and volunteers to collect, examine, identify, measure, and count fish populations. Our sampling efforts have shown a healthy rainbow and brown trout population.

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States L2 Landing Page Tabs

Our biologists work with Preserve staff and volunteers to collect, examine, identify, measure, and count fish populations. Our sampling efforts have shown a healthy rainbow and brown trout population.

Go to Science Center

News

Date published: March 8, 2021

Lasting Link With Landsat Helps Idaho Manage Water

On a ranking of states using water for irrigation, seeing California at the top probably wouldn’t surprise you. But would you expect Idaho to follow right behind?

Date published: November 30, 2020

The Blackfoot Volcanic Field of southeast Idaho—a result of interaction between the Yellowstone hotspot and tectonic activity

The Blackfoot Volcanic Field in southeast Idaho is a unique product of Yellowstone hotspot volcanism. While it is chemically similar to other volcanic rocks in eastern Idaho that are related to the hotspot, it is located far from the hot spot track—a testament to its entanglement with tectonic activity of the Basin and Range Province.

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Date published: March 30, 2021
Status: Active

Pacific Northwest Geologic Mapping: Northern Pacific Border, Cascades and Columbia

The Pacific Northwest is an area created by active and complex geological processes. On its path to the Pacific Ocean, the Columbia River slices through a chain of active volcanoes located along the western margin of the U.S. in Washington, Oregon, and northern California. These volcanoes rest above the active Cascadia subduction zone, which is the boundary where the oceanic tectonic plate...

Date published: September 30, 2020
Status: Completed

American Falls Reservoir Bathymetry

In cooperation with the Bureau of Reclamation, we surveyed the bathymetry within an area of about 500 acres of American Falls Reservoir between River Miles 713 and 714 August 6-8, 2019. The bathymetric survey provided high-resolution detail of a proposed treatment area for an aeration system that is being developed to support water quality during the American Falls spillway concrete repair...

Date published: August 18, 2020
Status: Active

LCMAP Change Stories: Where the Forests Fall, the Grasses Grow

The forests and rangelands of the Western U.S. face fire dangers on multiple fronts.

The trees themselves provide fuel for wildfires, of course, but there are additional factors at play in this mountainous, forested stretch of land at the Idaho-Montana border.

Attribution: Land Resources
Date published: July 1, 2020
Status: Active

Quantitative Disease Ecology

Researchers at the USGS are working on developing new quantitative methods to study disease dynamics in wildlife systems as well as systems at the wildlife-domestic-human interface. Much of our work focuses on how host population structure affects disease invasion, persistence and control in wildlife disease systems. We tackle these issues with a combination of simulation and statistical...

Date published: May 1, 2020
Status: Active

Salmon River Mountains Legacy Mining Studies

The objective of this study is to characterize the regional impact of legacy mining in the context of framework geology for the Salmon Mountains in central Idaho. This objective is addressed through three interrelated tasks: 1) framework geology, 2) watershed biogeochemical processes, and 3) characterization of trace metals in colloids (fine particles suspended in water).

Date published: April 8, 2020
Status: Active

Continuous Water-Quality Monitoring of Middle Snake River Springs in Support of Threatened and Endangered Snail Species

Two species of aquatic snails, the Banbury Springs limpet (Idaholanx fresti) and the Bliss Rapids snail (Taylorconcha serpenticola) live in springs along the middle Snake River in...

Date published: March 20, 2020
Status: Active

Bathymetric Mapping of the Kootenai River

The Kootenai River white sturgeon (Acipenser transmontanus) and other native fish species are culturally important to the Kootenai Tribe of Idaho, but their habitat and recruitment have been affected by anthropogenic changes to the river. The Tribe has undertaken a large-scale restoration project and needs objective...

Contacts: Ryan L Fosness
Date published: March 16, 2020
Status: Active

Sediment Transport in the Yankee Fork Salmon River

The Yankee Fork of the Salmon River is one of the larger watersheds in the upper Salmon River subbasin of central Idaho. Mining activities since the late 19th century, specifically placer mining and associated dredging from 1940 to 1953, have left the fluvial system in a highly altered and unnatural state. To improve aquatic and terrestrial habitat in the Yankee Fork, the Bureau of Reclamation...

Contacts: David M Evetts
Date published: March 10, 2020
Status: Active

Weed-Suppressive Bacteria – Testing a Control Measure for Invasive Grasses in the West

Recent popular news has implied that Weed-Suppressive Bacteria (WSB) holds promise for cheatgrass control, yet a lack of peer-reviewed research exists to support this claim. USGS researchers stepped up to the challenge of objectively and rigorously evaluating the effectiveness of WSB for controlling exotic annual grasses, such as...

Date published: March 6, 2020
Status: Active

Characterizing the Water Resources of the Big Lost River Valley

In cooperation with the Idaho Department of Water Resources, we are working to improve the scientific understanding of the Big Lost River basin's water resources. This improved understanding will support effective resource management. 

Date published: March 2, 2020
Status: Active

Groundwater-Flow Model for the Treasure Valley and Surrounding Area

in partnership with the Idaho Department of Water Resources (IDWR) and the Idaho Water Resource Board (IWRB), we are developing a numerical groundwater-flow model of the Treasure Valley and surrounding area. Resource managers will use the model to simulate potential human and climatic effects on groundwater for water-supply planning and management.

Date published: February 10, 2020
Status: Active

Real-Time Bridge Scour Monitoring and Evaluation

The most common cause of bridge failure is scour, when high-velocity streamflow scours streambed material from around bridge piers and abutments. As of 2017, the National Bridge Inventory listed 265 of Idaho's nearly 4,500 bridges (about 6 percent) as "scour critical." When rivers rise quickly, bridge inspectors have little or no time to mobilize and monitor bridges at risk of scour. Real-time...

Contacts: Ryan L Fosness
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Date published: March 2, 2021

Reanalysis of Additional Selected Archived NURE-HSSR Sediment Samples from Idaho and Montana

In December of 2018, the U.S. Geological Survey (USGS) signed a Technical Assistance Agreement with a third party to reanalyze 2,324 archived sample splits collected as part of the National Uranium Resource Evaluation (NURE) Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) project from selected areas in Idaho and Montana.

Date published: February 22, 2021

Verified Irrigated Agricultural Lands for the United States, 2002-17

The spatial extents of verified irrigated lands were compiled from various federal and state sources across the nation and combined into a single Geographic Information System (GIS) geodatabase for the purpose of model training and validation.

Date published: June 23, 2020

Global Geochemical Database for Critical Minerals in Archived Mine Samples

The Critical Minerals in Archived Mine Samples Database (CMDB) contains chemistry and geologic information for historic ore and ore-related rock samples from mineral deposits in the United States. In addition, the database contains samples from archetypal deposits from 27 other countries in North America, South America, Asia, Africa and Europe. Samples were obtained from archived ore

Date published: June 16, 2020

Hg Concentrations of Fish Tissue Samples in the Vicinity of Yellow Pine, Idaho.

The USGS examined mercury (Hg) concentrations in fish populations inhabiting impacted and reference streams as part of an investigation into the transport of trace metals in a watershed impacted by legacy mercury mining downstream from the Cinnabar mine site, Valley County, ID. Fish were sampled through an electrofishing survey utilizing a two-pass quantitative depletion approach where po

Date published: June 5, 2020

Argon data for Yellow Pine

This dataset accompanies planned publication 'Timing of Hydrothermal Alteration and Au-Sb-W Mineralization, Stibnite-Yellow Pine District, Idaho'. The Ar/Ar data is for samples that record the mineralization of the area. The geochronology provides time constraints for the mineralization studied in the manuscript. Samples were collected from the Yellow Pine region, and collection was d

Date published: April 23, 2020

Domestic Wells in the United States

Domestic wells provide drinking water supply for approximately 40 million people in the United States. Knowing the location of these wells, and the populations they serve, is important for identifying heavily used aquifers, locations susceptible to contamination, and populations potentially impacted by poor-quality groundwater. 

Date published: March 30, 2020

Geochemical Data Release for Idaho Primitive Area, including the contiguous Clear Creek-Upper Big Deer Creek Area, the Salmon River Breaks Primitive Area, the Sawtooth Primitive Area, and adjacent areas, central Idaho

The data release for the Idaho Primitive Area, including the contiguous, Clear Creek-Upper Big Deer Creek Area, Salmon River Breaks Primitive Area, the Sawtooth Primitive Area, and adjacent areas, central Idaho, contains a data set of previously unpublished geochemical data from the 1966-1984 projects. The purpose of the Primitive Area studies was to describe the geology, determin

Date published: September 26, 2019

Data for assessing the susceptibility of groundwater used for drinking water supply from selected principal aquifers of the Western United States, 2004-2018

Groundwater age distribution and susceptibility to natural and anthropogenic contaminants were assessed for selected principal aquifers of the Western United States: the Central Valley aquifer system (CVAL), the Basin and Range basin-fill aquifers (BNRF), the Rio Grande aquifer system (RIOG), the High Plains aquifer (HPAQ), the Columbia Plateau basaltic-rock aquifers (

Date published: September 6, 2019

Drainage basins and characteristics for selected streamgages within the Southern Rockies Landscape Conservation Cooperative domain

Streamflow and basin-characteristic data are needed for a variety of scientific applications including estimation of flow in ungaged basins and hydro-ecological classification of rivers. The U.S. Geological Survey (USGS), in cooperation with the Bureau of Reclamation and the Southern Rockies Landscape Conservation Cooperative (SRLCC), selected a subset of streamgages across the SRLC

Date published: January 1, 2019

Annual streamflow, runoff and baseflow, estimated for the period of record using six hydrograph-separation methods, for 312 gaged basins in the Northwest Volcanic Aquifer Study Area, USA, 1904-2015.

The U.S. Geological Survey’s Water Availability and Use Study Program (WAUSP) (https://water.usgs.gov/ogw/gwrp/activities/regional.html) supports quantitative assessments of groundwater availability in areas of critical importance. As part of a WAUSP study in the arid to semi-arid Northwest Volcanic Aquifer Study Area (...

Date published: December 6, 2018

Downloadable Data for Idaho-Snake River Downwarp Oil and Gas Assessments

GIS Data for Idaho-Snake River Downwarp Oil and Gas Assessments

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Black and grey map of the contiguous 48 states shaded by the number of people using domestic wells per square kilometer (2010)
April 23, 2020

Domestic wells provide drinking water supply for approximately 40 million people in the United States. Knowing the location of these wells, and the populations they serve, is important for identifying heavily used aquifers, locations susceptible to contamination, and populations potentially impacted by poor-quality groundwater. 

CITE
January 10, 2018

Scientists at WERC's Dixon Field station have fitted Cinnamon Teal with GPS backpacks. Using R, the telemetry locations are displayed on an image every two weeks.

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.

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Year Published: 2021

Virulence and infectivity of UC, MD and L strains of infectious hematopoietic necrosis virus (IHNV) in four populations of Columbia River Basin Chinook salmon

Infectious Hematopoietic Necrosis Virus (IHNV) infects juvenile salmonid fish in conservation hatcheries and aquaculture facilities, and in some cases, causes lethal disease. This study assesses intra-specific variation in the IHNV susceptibility of Chinook salmon (Oncorhynchus tshawytscha) in the Columbia River Basin (CRB), in the northwestern...

Hernandez, Daniel G.; Brown, William E.; Naish, Kerry A.; Kurath, Gael

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Year Published: 2020

Climate change vulnerability assessment for Pacific Lamprey in rivers of the Western United States

Pacific Lamprey (Entosphenus tridentatus) are a native anadromous species that, like salmon, historically returned to spawn in large numbers in watersheds along the west coast of the United States (U.S.). Lamprey play a vital role in river ecosystems and are one of the oldest vertebrates that have persisted over time likely influencing the...

Wang, Christina J; Shaller, Howard A; Coates, Kelly C.; Hayes, Michael C.; Rose, Robert K

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Year Published: 2019

Fault slip associated with the 2 September 2017 M 5.3 Sulphur Peak, Idaho, earthquake and aftershock sequence

The 2 September 2017 M 5.3 Sulphur Peak, Idaho, earthquake is one of the largest earthquakes in southern Idaho since the 1983 M 6.9 Borah Peak earthquake. It was followed by a vigorous aftershock sequence for nearly two weeks that included five events above M 4.5. The coseismic and early postseismic deformation was measured with...

Pollitz, Fred; Wicks, Charles; Yeck, William L.; Evans, James E.

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Year Published: 2018

Geologic map of the central Beaverhead Mountains, Lemhi County, Idaho, and Beaverhead County, Montana

This geologic map of the central Beaverhead Mountains portrays a complex geologic history of depositional basin development interspersed with deformational events. Generalized geology for young basins, compiled from sources on both sides of the range, is combined with newly mapped bedrock geology to better integrate geologic development of the map...

Lund, Karen
Lund, K., 2018, Geologic map of the central Beaverhead Mountains, Lemhi County, Idaho, and Beaverhead County, Montana: U.S. Geological Survey Scientific Investigations Map 3413, pamphlet 27 p., scale 1:50,000, https://doi.org/10.3133/sim3413.

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Year Published: 2018

State transportation agencies partner to deploy and enhance ShakeCast

The California Department of Transportation (Caltrans) is organizing and leading a three-year Transportation Pooled Fund (TPF) project, Connecting the Dots: Implementing ShakeCast Across Multiple State Departments of Transportation for Rapid Post-Earthquake Response. Ten state Departments of Transportation (DOT)—CA, ID, MO, MS, OK, OR, SC, TX, UT...

Turner, L.; Wald, David J.; Lin, Kuo-wan; Chiou, Brian; Slosky, Daniel

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Year Published: 2018

Seismicity in the Challis, Idaho region, January 2014 - May 2017: Late aftershocks of the 1983 Ms 7.3 Borah Peak earthquake

In April 2014, after about 20 yrs of relatively low seismicity, an energetic earthquake sequence (maximum ML">ML 4.8) began 25–30 km northwest of the 1983 Ms">Ms 7.3 Borah Peak earthquake rupture area near the town of Challis, Idaho. This sequence ended in the fall of 2014, but in January 2015, a second energetic...

Pang, Guanning; Koper, Keith D.; Stickney, Michael C.; Pechmann, James C.; Burlacu, Relu; Pankow, Kristine L.; Payne, Suzette; Benz, Harley M.

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Year Published: 2018

An epidemiological model of virus transmission in salmonid fishes of the Columbia River Basin

We have developed a dynamic epidemiological model informed by records of viral presence and genotypes to evaluate potential transmission routes maintaining a viral pathogen in economically and culturally important anadromous fish populations. In the Columbia River Basin, infectious hematopoietic necrosis virus (IHNV) causes severe disease,...

Ferguson, Paige F. B.; Breyta, Rachel; Brito, Ilana L.; Kurath, Gael; LaDeau, Shannon L.
Ferguson, P.F.B., R. Breyta, I. Brito, G. Kurath, and S.L. LaDeau. 2018. An epidemiological model of virus transmission in salmonid fishes of the Columbia River Basin. Ecol. Model. 377: 1-15.

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Year Published: 2018

Migratory behavior and physiological development as potential determinants of life history diversity in fall Chinook Salmon in the Clearwater River

We studied the influence of behavior, water velocity, and physiological development on the downstream movement of subyearling fall‐run Chinook Salmon Oncorhynchus tshawytscha in both free‐flowing and impounded reaches of the Clearwater and Snake rivers as potential mechanisms that might explain life history diversity in this stock....

Tiffan, Kenneth F.; Kock, Tobias J.; Connor, William P.; Richmond, Marshall C.; Perkins, William A.
Tiffan, K.F., T.J. Kock, W.P. Connor, M.C. Richmond, and W.A. Perkins. 2018. Migratory behavior and physiological development as potential determinants of life history diversity in fall Chinook salmon in the Clearwater River. Trans. Am. Fish. Soc. 147(2): 400-413.

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Year Published: 2017

Mobilization of mercury and arsenic from a carbonate-hosted ore deposit, central Idaho, U.S.A.

The Cinnabar and Fern mine sites in central Idaho are primary source areas for elevated mercury and arsenic entering the South Fork of the Salmon River, which provides critical spawning habitat for bull trout and Chinook salmon. Mercury mineralization is hosted by carbonate rocks, which generate waters dominated by Ca2+ and HCO3 - at pH 7 to 9. A...

Holloway, JoAnn M.; Pribil, Michael; McCleskey, R. Blaine; Etheridge, Alexandra B.; Krabbenhoft, David P.; Aiken, George R.
Holloway, J.M, Pribil, M.J., McCleskey, R.B., Etheridge, A.B., Krabbenhoft, D.P., Aiken, G.R., 2017, Mobilization of mercury and arsenic from a carbonate-hosted ore deposit, central Idaho, U.S.A.: Procedia Earth and Planetary Science 17, 610-613. http://dx.doi.org/doi: 10.1016/j.proeps.2016.12.163

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Year Published: 2017

Infectious hematopoietic necrosis virus virological and genetic surveillance 2000–2012

Surveillance records of the acute RNA pathogen of Pacific salmonid fish infectious hematopoietic necrosis virus are combined for the first time to enable landscape-level ecological analyses and modeling. The study area is the freshwater ecosystems of the large Columbia River watershed in the U.S. states of Washington, Oregon, and Idaho, as well as...

Breyta, Rachel; Brito, Ilana L.; Kurath, Gael; LaDeau, Shannon L.

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Year Published: 2016

Ambient water quality in aquifers used for drinking-water supplies, Gem County, southwestern Idaho, 2015

In recent years, the rapid population growth in Gem County, Idaho, has been similar to other counties in southwestern Idaho, increasing about 54 percent from 1990 to 2015. Because the entire population of the study area depends on groundwater for drinking water supply (either from self-supplied domestic, community, or municipal-supply wells), this...

Bartolino, James R.; Hopkins, Candice B.
Bartolino, J.R., and Hopkins, C.B., 2016, Ambient water quality in aquifers used for drinking-water supplies, Gem County, southwestern Idaho, 2015: U.S. Geological Survey Scientific Investigations Report 2016–5170, 33 p., https://doi.org/10.3133/sir20165170.

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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.

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Hailey, Idaho
August 22, 2016

The R package wrv is for processing the groundwater-flow model of the Wood River Valley (WRV) aquifer system, south-central Idaho. The groundwater-flow model is described in the associated model report and model archive. Included in the package is MODFLOW-USG version 1.3, a U.S. Geological Survey (USGS) computer code that solves the groundwater-flow equation.

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March 11, 2021

Managing Post-Fire, Climate-Induced Vegetation Transitions

Warmer, drier and longer fire seasons in the Northwest have led to larger and more frequent wildfires. These changes in fire activity, combined with warmer and drier post-fire conditions, have in turn led to growing concern that in some areas of the Northwest, particularly in forests and shrublands east of the Cascade Range, existing plant communities may face difficulty

Map of seismicity in the Yellowstone region during 2020
January 1, 2021

Map of seismicity in the Yellowstone region during 2020

Map of seismicity (red circles) in the Yellowstone region during 2020. Gray lines are roads, red line shows the caldera boundary, Yellowstone National Park is outlined by black dashed line, and gray dashed lines denote state boundaries.

January 1, 2021

Yellowstone Volcano Observatory Monthly Update for December 2020

Mike Poland, Scientist-in-Charge of the Yellowstone Volcano Observatory, provides an overview of activity at Yellowstone during December 2020.
 

December 1, 2020

Yellowstone Volcano Observatory Monthly Update for November 2020

Mike Poland, Scientist-in-Charge of the Yellowstone Volcano Observatory, gives an overview of activity at Yellowstone during November 2020.
 

Map of southeastern Idaho showing volcanic rocks related to the Yellowstone hotspot.
November 23, 2020

Volcanic rocks in SE Idaho that are related to the Yellowstone hotspot

Map of southeastern Idaho showing volcanic rocks related to the Yellowstone hotspot. Basalt is shown in red and rhyolite in yellow. Blue circles indicate the location of past Yellowstone calderas; caldera names and approximate ages are shown (Ma = million years old).

Lidar hillshade map of part of the Blackfoot Volcanic Field
November 23, 2020

Lidar hillshade map of part of the Blackfoot Volcanic Field

Lidar hillshade map of part of the Blackfoot Volcanic Field, showing rhyolite domes and fault scarps.

November 19, 2020

Yellowstone Volcano Observ: Overview, Monitoring, Hazards, Results

Just what is the Yellowstone Volcano Observatory? In this video, Mike Poland, Scientist-in-Charge of YVO, gives an overview of the institutions that make up the Observatory, how YVO monitors volcano and earthquake activity at Yellowstone, the geologic hazards of the region, and some of the noteworthy new results and observations from YVO scientists.
 

November 2, 2020

Yellowstone Volcano Observatory Monthly Update for October 2020

Mike Poland, Scientist-in-Charge of the Yellowstone Volcano Observatory, gives an overview of activity at Yellowstone during October 2020.
 

October 1, 2020

Yellowstone Volcano Observatory Monthly Update: October 1, 2020

Mike Poland, Scientist-in-Charge of the Yellowstone Volcano Observatory, gives an overview of activity at Yellowstone during September 2020.
 

September 1, 2020

Yellowstone Volcano Observatory Monthly Update: September 1, 2020

Mike Poland, Scientist-in-Charge of the Yellowstone Volcano Observatory, gives an overview of activity at Yellowstone during August 2020.
 

man holding microphone
August 25, 2020

USGS Director Jim Reilly gives a speech

The USGS Forest and Rangeland Ecosystem Science Center (FRESC) held a groundbreaking ceremony on August 25, 2020 at the Idaho Water Science Center (IDWSC) in Boise, Idaho. FRESC is moving their Snake River Field Station, presently located on the Boise State University campus, to the IDWSC campus and building a new facility for the USGS Pacific Northwest environmental DNA

...
August 1, 2020

Yellowstone Volcano Observatory Monthly Update: August 1, 2020

Mike Poland, Scientist-in-Charge of the Yellowstone Volcano Observatory, gives an overview of activity at Yellowstone during July 2020.
 

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Color photo of irrigated fields near Ashton, Idaho
March 8, 2021

On a ranking of states using water for irrigation, seeing California at the top probably wouldn’t surprise you. But would you expect Idaho to follow right behind?

Map of southeastern Idaho showing volcanic rocks related to the Yellowstone hotspot.
November 30, 2020

The Blackfoot Volcanic Field in southeast Idaho is a unique product of Yellowstone hotspot volcanism. While it is chemically similar to other volcanic rocks in eastern Idaho that are related to the hotspot, it is located far from the hot spot track—a testament to its entanglement with tectonic activity of the Basin and Range Province.

Hells Canyon on the Snake River
September 28, 2020

SPARROW mappers are interactive tools that allow users to evaluate streamflow and nutrient and sediment conditions as well as the importance of different sources of contaminants in a selected river basin. Data can be visualized at different scales using maps and interactive graphs and tables.

Dragonfly larvae being held in an open hand
July 21, 2020

A team of federal, academic, and NGO researchers conducted a national-scale assessment of mercury bioaccumulation in aquatic ecosystems using dragonfly larvae as biosentinels.

Idaho Hydrologic Update, May 2020
May 18, 2020

April 2020 issue of the Idaho Hydrologic Update from the USGS Idaho Water Science Center.

Sagebrush surrounded by cheatgrass
April 24, 2020

Understanding ecosystem energy and hydrological response is important for predicting and managing future water resources under climate and land-cover changes. 

Sagebrush steppe landscape invaded by cheatgrass and medusahead
April 24, 2020

Understanding the land-atmosphere interaction at the ecosystem scale is important for water resource management and regional or global climate studies. Researchers examined surface fluxes of energy and moisture for three different ecosystems - sagebrush, cheatgrass, and lodgepole pine - in the Snake River Plain of Idaho. 

Boise River near Middleton, Idaho
April 10, 2020

For coldwater species such as bull trout, water temperatures can affect energy reserves for growth, reproduction, or survival. 

idaho quake
March 31, 2020

On March 31, 2020, a  magnitude 6.5 earthquake struck  near Boise, ID, in the Challis National Forest. Seismic instruments indicate the earthquake originated at a depth of 6.2 miles (10 kilometers).

TNMCorps Mapping Challenge: Summary Results for City/Town Halls in ID
February 25, 2020

This challenge is now complete!!  Thank you to everyone who contributed!

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