United States of America

Filter Total Items: 3,237
Date published: August 20, 2020
Status: Active

East Fork Whitewater River at Richmond IN

A Super Gage is a conventional streamflow gage equipped with continuous water-quality monitors. Super gages provide real-time data specifically designed to improved our understanding of watershed processes and to address specific water-resource issues such as climate and land-use effects, water-related human health issues, floods and droughts, or hazardous substance spills. Our ability to...

Contacts: Jeffrey Woods
Date published: August 20, 2020
Status: Completed

2019 Geophysical surveys and sediment coring in southern Cascadia (northern California)

Objectives: The sediment sampling and geophysical surveys were designed to address questions regarding tectonic activity and sediment dispersal patterns across the margin. Survey tracks and sampling sites were targeted to investigate the Eel River forearc basin sedimentation history and the sources and pathways of sediment gravity flows, both of which provide context for...

Contacts: Jenna C Hill
Date published: August 19, 2020
Status: Completed

2019 Lake Ozette

Objectives: Conduct surveys to reconstruct the timing of large earthquakes in northern Cascadia from earthquake-triggered landslide deposits in Lake Ozette, WA.

These surveys are part of the USGS project, “Cascadia Subduction Zone Marine Geohazards.”

Contacts: Danny Brothers
Date published: August 19, 2020
Status: Completed

2019 Seafloor Geodesy cruise

Objectives: Constrain the rate and spatial distribution of locking (stress accumulation) along the megathrust offshore Cascadia with seafloor geodetic instrument arrays that operate using indirect-path acoustic ranging methods with Global Navigation Satellite System positioning (GNSS-A) (Figure 1)

This survey is part of the USGS project, “...

Contacts: Janet Watt
Date published: August 19, 2020
Status: Completed

2019 USGS-NOAA Multibeam Bathymetry

Objectives: Fill in critical baseline bathymetric mapping gaps along the mid- to upper-slope.

These surveys are part of the USGS project, “Cascadia Subduction Zone Marine Geohazards.”

Contacts: Peter Dartnell
Date published: August 19, 2020
Status: Completed

3-D Geologic and Seismic Velocity Models of the San Francisco Bay Region

The USGS 3-D Geologic and Seismic Velocity Models of the San Francisco Bay region provide a three-dimensional view of the geologic structure and physical properties of the region down to a depth of 45 km (28 miles). Construction of this 3D Bay Area model has been a joint effort of the USGS Earthquake Hazards Program and the...

Date published: August 19, 2020
Status: Completed

2019 Geophysical surveys and instrumented tripod deployment in and around Astoria Canyon

Objectives: Examine the processes associated with sediment storage and remobilization in and around Astoria Canyon to understand the processes that lead to turbidity flows.

These surveys are part of the USGS project, “Cascadia Subduction Zone Marine Geohazards.”

Contacts: Jenna C Hill
Date published: August 19, 2020
Status: Active

Remote Sensing Coastal Change

We use remote-sensing technologies—such as aerial photography, satellite imagery, structure-from-motion (SfM) photogrammetry, and lidar (laser-based surveying)—to measure coastal change along U.S. shorelines.

Date published: August 18, 2020
Status: Completed

2019 Regional geophysical surveys of northern and central Cascadia (offshore Washington and Oregon)

Objectives: Systematic characterization of upper plate structure and offshore geohazards in northern Cascadia.

These surveys are part of the USGS project, “Cascadia Subduction Zone Marine Geohazards.”

Contacts: Janet Watt
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: August 18, 2020
Status: Completed

2018 Regional geophysical surveys of southern Cascadia (offshore northern California and southern Oregon)

Objectives: Characterize offshore geohazards and source-to-sink sedimentary dynamics offshore southern Cascadia.

These surveys are part of the USGS project, “Cascadia Subduction Zone Marine Geohazards.”

Contacts: Janet Watt
Date published: August 18, 2020
Status: Active

CoSMoS-Groundwater

The USGS Coastal Storm Modeling System (CoSMoS) team has extensively studied overland flooding and coastal change due to rising seas and storms. Interactions with coastal stakeholders have elucidated another important question; will rising seas also intrude into coastal aquifers and raise groundwater...

Contacts: Patrick Barnard