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Updates on the status of Mauna Loa activity will be posted on the HVO web site in the morning and afternoon at: https://www
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https://www.usgs.gov/programs/VHP/volcano-updates
gov/hans2/view/notice/DOI-USGS-AVO-2026-09-04T18:48:35+00:00
Shishaldin Alert Level = ADVISORY Aviation Color Code = YELLOW
https://www.usgs.gov/publications/environmental-data-associated-sites-infected-white-nose-syndrome-wns-october-2011
However, to predict where and when the disease will spread to new sites is difficult because detailed site information and associated environmental data are notably sparse
https://www.usgs.gov/publications/impact-mine-and-natural-sources-mercury-water-sediment-and-biota-harley-gulch-adjacent
The decreases in HgT and HgF between sample sites HG5 and HG7 suggests that this second source of connate groundwater to Harley Gulch is distinct from the Hg-enriched source that enters the middle of the wetlands at sample site HG1
https://www.usgs.gov/centers/arizona-water-science-center/science/estimation-dissolved-solids-concentrations-using
The study developed site-specific relations of specific conductance, water temperature, and dissolved-solids concentrations at four monitoring sites in the Yuma area between Imperial Dam and the United States–Mexico southerly international boundary to predict dissolved-solids concentrations using surrogate
https://www.usgs.gov/centers/norock/science/investigation-aquatic-invasive-species-pristine-sites-greater-yellowstone
For Grand Teton National Park, we provide an example of how invasion risk posed by human activity can be used to dictate site selection in the GRTS framework
https://www.usgs.gov/streamstats/streamstats-fundamentals
After the user indicates that the boundary is correct, StreamStats can compute basin characteristics (such as drainage area, stream slope, and mean annual precipitation) and estimate streamflow statistics (such as the 1-percent flood, the mean flow, and the 7-day, 10-year low flow) for the site
https://www.usgs.gov/programs/environmental-health-program/science/multidisciplinary-approach-remediating-watersheds
Reclaimed flood plain and stream channel at former site of the Buckeye mill tailings, 2002
https://www.usgs.gov/programs/environmental-health-program/science/uranium-springs-sampled-near-grand-canyon-likely
Grand Canyon National Park in Arizona is a United Nations World Heritage Site, an international tourist destination, and the region is sacred place to many Native Americans
https://www.usgs.gov/special-topics/great-lakes-restoration-initiative/science/areas-concern-effects-contaminants
The source of the PFASs at that location were a former air force base which conducted extensive fire-fighting training exercises at that site
https://www.usgs.gov/centers/alaska-science-center/science/multi-resource-integrated-assessments-mria-and-critical
Provide a means of evaluating a site relative to the surrounding natural and societal landscape
https://www.usgs.gov/staff-profiles/daniel-l-tush
POEA has been shown to have toxic effects to some aquatic organisms making the potential transport of POEA from the application site into the environment an important concern
https://www.usgs.gov/centers/arizona-water-science-center/science/national-water-quality-program-monitoring-networks
gov website belongs to an official government organization in the United States
https://www.usgs.gov/programs/environmental-health-program/science/no-adverse-reproductive-effects-observed-tree
The study site, Clarks Marsh, is on the south side of the former Wurtsmith Air Force Base in Oscoda Township, Michigan, and where PFAS occurrence has been previously documented in groundwater and nearby surface waters
https://www.usgs.gov/publications/2008-weather-and-aeolian-sand-transport-data-colorado-river-corridor-grand-canyon
The quantitative methods and data discussed here form a basis for monitoring ecosystem processes that affect archeological-site stability
https://www.usgs.gov/programs/environmental-health-program/science/study-highlights-complexity-chemical-mixtures-united
This study was an opportunity to assess the factors related to site-to-site differences in stream-contaminant complexity and to put the chemical data into context with potential effects on aquatic animal health
https://www.usgs.gov/centers/pacific-coastal-and-marine-science-center/science/flying-eyeball-measures-grand-canyon-sand
The quantitative methods and data discussed here form a basis for monitoring ecosystem processes that affect archeological-site stability
https://www.usgs.gov/programs/environmental-health-program/science/us-geological-survey-develops-approach-assess
While resource extraction has not begun at this mine there has been premining construction activity to prepare the site
https://www.usgs.gov/centers/southwest-biological-science-center/science/desert-tortoise-ecology-and-renewable-energy
It is important to note that the effects of site operation and maintenance do not affect all species the same
https://www.usgs.gov/centers/ohio-kentucky-indiana-water-science-center/science/harmful-algae-blooms-habs
Predicting when and where a bloom may occur is important to protect the public that uses and consumes a water resource; however, predictions are complicated and likely site specific because of the many factors affecting
https://www.usgs.gov/programs/environmental-health-program/science/flood-redistributes-mercury-grand-canyon-aquatic-food
Scientists collected 18–20 benthic invertebrate samples per season and site and sampled the predominant habitats using multiple approaches
https://www.usgs.gov/centers/southwest-biological-science-center/science/timing-really-everything-evaluating-resource
gov website belongs to an official government organization in the United States
https://www.usgs.gov/faqs/can-i-volunteer-usgs
gov is the best starting point for volunteer positions with the USGS and other federal agencies
https://www.usgs.gov/staff-profiles/charles-n-alpers
This work has included research on acid mine drainage at the Iron Mountain Superfund site, including documentation of negative-pH water and associated sulfate minerals
https://www.usgs.gov/programs/environmental-health-program/science/dragonfly-larvae-are-effective-bioindicators-mercury
Dragonfly larvae were selected as bioindicators because they are widely distributed and abundant, are key components of aquatic food web energetic pathways, are relatively long-lived, and show high site fidelity (National Park Service
https://www.usgs.gov/special-topic/water-science-school/science/nitrogen-and-water
It may be difficult or expensive to retain on site all nitrogen brought on to farms whether for feed, fertilizer, or from animal manure
https://www.usgs.gov/programs/environmental-health-program/science/organic-geochemistry-research-core-technology-team
gov website belongs to an official government organization in the United States
https://www.usgs.gov/programs/environmental-health-program/science/organic-chemistry-research-core-technology-team
gov website belongs to an official government organization in the United States
https://www.usgs.gov/staff-profiles/mark-marvin-dipasquale
During much of his USGS tenure, his research focus has been on mercury cycling in various ecosystems, including: the San Francisco Bay watershed and associated mining areas throughout CA; FL Everglades; Carson River, NV (mercury Superfund site); coastal Louisiana; Patagonia region of Argentina; Puget Sound, WA; USGS
https://www.usgs.gov/staff-profiles/daniel-esler
csv): 1) mussel sampling site layout information, 2) mussel counts for mussels greater than 20 millimeters in a quadrat, 3) mussel size measurements for mussels greater
https://www.usgs.gov/programs/toxic-substances-hydrology/science/geospatial-analyses-and-applications-core-technology
These relationships can also be used to find locations similar to these place-based study sites, which may be useful for future site-selections or result extrapolation