Images

Mount St. Helens erupted 38 years ago, May 18, 1980 

Nested polymerase chain reaction (nPCR) for the detection of Renibacterium salmoninarum. Following two rounds of PCR amplification, samples are pipetted into an agarose gel for electrophoresis.

Nested polymerase chain reaction (nPCR) for the detection of Renibacterium salmoninarum. Agarose gel electrophoresis is used for size separation and visualization of amplified DNA sequences.

U.S. Geological Survey student hydrologic technician Mike Michelotti collects a water-qaulity sample from the Coeur d'Alene River at Rose Lake, Idaho. USGS streamgage 12413810 can be seen in the background. The sample was collected as part of ongoing water-quality monitoring that the USGS conducts in the Coeur d'Alene River basin on behalf of the U.S.

USGS streamgage station 13295000, Valley Creek at Stanley, Idaho

U.S. Geological Survey hydrologic technicians Kevin Kirlin (left) and Ryan Smith collect water-quality samples from the Coeur d'Alene River near Cataldo (USGS 12413500) as part of an ongoing monitoring program that the USGS conducts on behalf of the U.S. Environmental Protection Agency.

Orthophoto of the mouth of the Elwha River in Washington. The orthophoto was compiled from images collected with a Ricoh GR camera operating at 2-second intervals and mounted on a Cessna 172 piloted by Rite Bros. Aviation.

Orthophoto (GigaPan) of the former Elwha Dam and former Lake Aldwell, on the Elwha River, Washington, compiled from ultra high-resolution images collected with a Ricoh GR camera operating at 2-second intervals, mounted on a Cessna 172 piloted by Rite Bros. Aviation and processed using Structure-from-Motion techniques.

Orthophoto (GigaPan) of the former Glines Canyon Dam and former Lake Mills, on the Elwha River, Washington, compiled from ultra high-resolution images collected with a Ricoh GR camera operating at 2-second intervals, mounted on a Cessna 172 piloted by Rite Bros. Aviation and processed using Structure-from-Motion techniques.

The choice when issuing earthquake warnings is to: 1) issue alerts for weak shaking and potentially provide long warning times, but risk sending alerts for the many events that do not go on to produce damaging ground shaking, or 2) issue alerts only when ground shaking is expected to be damaging, with the tradeoff that the alert will be sent much later, reducing

Spread plate procedure for quantitative culture Renibacterium salmoninarum from fish tissue or ovarian fluid.

Variability associated with streamflow permanence predictions

Stream observation points and focal basins for PROSPER project

Mean Annual Streamflow Permanence Probability

An example of mowed linear fuel breaks along both sides of a gravel road in southwestern Idaho

Digital elevation model (left) and orthomosaic (right) of the middle Elwha River

Image of flyer for GeoGirls 2017 science field camp at Mount St. Helens which was held July 30 to August 3, 2017.

Mount St. Helens, as viewed from the East-Northeast. The inside of the crater rim is just visible in the upper right of the mountain.

Tissue sections are mounted on glass slides, stained and examined with a microscope that magnifies cellular details up to 2,000 times with brightfield or fluorescence imaging. Microscopes are used in our research to understand the pathological changes caused by infectious agents such as bacteria, fungi, parasites and viruses.

Quantitative polymerase chain reaction (qPCR) assay for the detection of Renibacterium salmoninarum DNA. Observation of qPCR results on the screen of a sequence detection system.

Quantitative Polymerase Chain Reaction (qPCR) assay for the detection of Renibacterium salmoninarum DNA. A nucleic acid sequence detection system is shown.