Images

Installation of a post-hole seismometer. This is part of a USGS effort, in collaboration with partners from the Woods Hole Oceanographic Institution Ocean Bottom Seismic Instrument Center, to create a record of past earthquakes from Skilak Lake on the Kenai Peninsula of Alaska.

Peter Haeussler (USGS), Brian Andrews (USGS), Hannah Brewer (WHOI), and Tim Kane (WHOI) prepare to launch the OBS float rig at the Upper Skilak Campground Boat Ramp. R/V Lutris (background) was used to tow the rig to the deployment sites.

Peter Haeussler (USGS), Brian Andrews (USGS), Hannah Brewer (WHOI), Rob Witter (USGS), and Tim Kane (WHOI) prepare to launch the OBS float rig at the Upper Skilak Campground Boat Ramp. R/V Lutris (background) was used to tow the rig to the deployment sites.

Pulling in R/V Lutris on Skilak Lake, Alaska. This is part of a USGS effort, in collaboration with partners from the Woods Hole Oceanographic Institution Ocean Bottom Seismic Instrument Center, to create a record of past earthquakes from Skilak Lake on the Kenai Peninsula of Alaska.

Peter Haeussler (USGS), Brian Andrews (USGS), Hannah Brewer (WHOI), Rob Witter (USGS) and Tim Kane (WHOI) prepare to launch the OBS float rig at the Upper Skilak Campground Boat Ramp. R/V Lutris (background) was used to tow the rig to the deployment sites.

Tim Kane (WHOI) on the float rig supporting the OBS on Skilak Lake, Alaska. This is part of a USGS effort, in collaboration with partners from the Woods Hole Oceanographic Institution Ocean Bottom Seismic Instrument Center, to create a record of past earthquakes from Skilak Lake on the Kenai Peninsula of Alaska.

Brian Andrews (USGS) pulling in Hannah Brewer (WHOI) during fieldwork on Skilak Lake, Alaska to create a record of past earthquakes from Skilak Lake on the Kenai Peninsula of Alaska. In May 2024, they deployed two seismographs on the bottom of the lake and eight seismographs on land around the lake. Each instrument will collect data there for about 1 year. 

Skilak Lake, Alaska. A team of USGS scientists, in collaboration with partners from the Woods Hole Oceanographic Institution Ocean Bottom Seismic Instrument Center, are aiming to create a record of past earthquakes from Skilak Lake on the Kenai Peninsula of Alaska.

Skilak Lake, Alaska. A team of USGS scientists, in collaboration with partners from the Woods Hole Oceanographic Institution Ocean Bottom Seismic Instrument Center, are aiming to create a record of past earthquakes from Skilak Lake on the Kenai Peninsula of Alaska.

Brian Andrews (USGS), Nathan Miller (USGS), and Rob Witter (USGS) installing post-hole seismometers and attaching a station box containing electronics and batteries.

The float rig supporting the OBS is towed to the deployment site on Skilak Lake. Hannah Brewer (WHOI) is on board. This is part of a USGS effort, in collaboration with partners from the Woods Hole Oceanographic Institution Ocean Bottom Seismic Instrument Center, to create a record of past earthquakes from Skilak Lake on the Kenai Peninsula of Alaska.

The R/V Lutris on Skilak Lake, Alaska. A team of USGS scientists, in collaboration with partners from the Woods Hole Oceanographic Institution Ocean Bottom Seismic Instrument Center, are aiming to create a record of past earthquakes from Skilak Lake on the Kenai Peninsula of Alaska.

Photograph of a salt marsh with ponding in coastal Connecticut taken during estuarine research field work.

Study region with GTSM-ERA5 output locations marked as black circles and tide gauge locations marked as blue squares. Gray labels denote NOAA designated tide gauge station IDs. Information on tide gauges, including ID number, latitude, longitude, and the date when observations start, are listed in the table to the right of the map.

Component contributions to extreme water levels. Panel (a) shows GTSM-ERA5 stations (in black) with highlighted “multi-POT” node locations marked in red and numbered to correspond with panel (c).

Cover image for the geonarrative "Paleoclimate: Lessons from the past, roadmap for the future". In this interactive geonarrative, viewers can explore the different applications of USGS paleoclimate research.

Map showing location of radar network for the Advanced Quantitative Precipitation Information system in the San Francisco Bay Area.

Animation of a computed tomography scan of a coral core.

Animation of a computed tomography scan of a coral core.

Example of the relationship between CT intensities and measured density of the coral standards used to calibrate data. The measured density of the coral standards are compared to the mean intensities of each standard. Linear regressions calculated from the standard values are then used to calibrate data.

Orbicella spp. coral sample with no packing material. Center of image is darker than edges. Transect across image shows intensity values lower in the center creating a cupping effect.