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Transforming understanding of Earth systems and hazards using geodesy.

 
 

HIGHLIGHTS

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Updates on a Polar Network: ANET in the 2018-19 Season

Updates on a Polar Network: ANET in the 2018-19 Season

March 11, 2019

POLENET, a multiyear NSF-funded project, has entered its third award phase. The team for the 2018-19 Antarctic season, composed of six people, left McMurdo station for the remote field camp of WAIS Divide on December 13th, 2018. During the six-week deployment, the team installed five new GPS stations on the coast of Marie Byrd Land.

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CHORDS Provides Next Generation Infrastructure for Real-time Geoscience Data Services

CHORDS Provides Next Generation Infrastructure for Real-time Geoscience Data Services

March 8, 2019

The EarthCube Cloud-Hosted Real-time Data Services for the Geosciences (CHORDS) project aims to simplify access to real-time geoscience data. Through CHORDS portals, scientists can visualize data streams: (1) in samples/min/hour/day, (2) as simple time-series, and (3) via the time-series visualization software Grafana for real-time time-series analysis.

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Incorporating Real-Time GNSS Data into the ShakeAlert Earthquake Early Warning System

Incorporating Real-Time GNSS Data into the ShakeAlert Earthquake Early Warning System

March 8, 2019

UNAVCO is actively participating in the testing and implementation of the ShakeAlert Earthquake Early Warning (EEW) system for the United States west coast that is operated by the US Geological Survey.

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Accessible Earth: Innovative Field Course Increases Options and Accessibility to Geoscience

Accessible Earth: Innovative Field Course Increases Options and Accessibility to Geoscience

February 28, 2019

Current trends in US demographics, rising costs of higher education, and hurdles to entry and retention of first-generation students seriously threaten our ability to mitigate future workforce shortages across STEM fields, with geosciences among the least diverse and most at risk. At the same time, it is widely recognized that the geoscience curriculum must be modernized to better prepare the next generation to utilize geoscience data streams to maximally benefit society and ensure a sustainable future.

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SCIENCE SNAPSHOTS

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Probabilities of Large Earthquakes in Alaska

Probabilities of Large Earthquakes in Alaska

February 28, 2018

A crustal deformation model for the Western United States fits geodetic and geologic observations and shows where major changes in the crust are occurring. Such modeling is critical for earthquake hazard assessments and for understanding Earth processes.

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Stable North American Plate Bending and Moving After Ice Loss According to GPS

Stable North American Plate Bending and Moving After Ice Loss According to GPS

September 17, 2018

Analysis of thousands of GPS observations over decades shows the upward bending of the stable North American plate due to ice loss and horizontal contraction, mostly due to higher than expected inward velocities around the edges of the former ice sheets.

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Looking for Dark Matter Passing Through the GPS Constellation

Looking for Dark Matter Passing Through the GPS Constellation

November 21, 2017

The Global Positioning System (GPS) constellation can be used to detect dark matter. Sixteen years of ground-based GPS receiver observations were utilized to look for dark matter passing near Earth. Although no dark matter was detected, the results refine the properties of the universe, the accuracies of atomic clocks and future searches for dark matter.

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Measuring Permafrost on the North Slope of Alaska with GNSS

Measuring Permafrost on the North Slope of Alaska with GNSS

January 18, 2019

The freeze-thaw dynamics of permafrost on the north slope of Alaska was measured over 12 years using a Global Navigation Satellite System (GNSS) site permanently embedded in the permafrost near Barrow, Alaska. The data reveal subsidence due to thawing each summer plus interannual variations. The technique provides a new spatial and temporal approach to quantify permafrost changes and it can be applied at more than 200 GNSS sites in cold regions.

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How Flood and Fire Alter Landscape, Seen Through the Discerning Eye of Ground-based LIDAR

How Flood and Fire Alter Landscape, Seen Through the Discerning Eye of Ground-based LIDAR

February 7, 2019

A colluvial hollow in Fourmile Canyon, Colorado that was present after the 2010 Fourmile Canyon wildfire transitioned to a fluvial channel with steps and pools while retaining the original hollow roughness after an intense 2013 flood. The changes were measured with a terrestrial laser scanner from UNAVCO and can help understand future risks in a changing landscape.

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Tsunami Hazards in Central America

Tsunami Hazards in Central America

November 8, 2017

Central America faces tsunami threats along the Pacific and Caribbean coasts and at the shores of large lakes. Large earthquakes caused the most damaging tsunamis, however, landslides or volcanic eruptions can cause tsunamis around large lakes. Warning systems rely on seismic and geodetic observations. The Central American Tsunami Advisory Center (CATAC) will use these observations to help reduce losses.

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Integrating Geodetic Data For Earthquake Warnings in the Western U.S.

Integrating Geodetic Data For Earthquake Warnings in the Western U.S.

January 03, 2019

Real-time Global Navigation Satellite System (GNSS) ground-based sites can measure displacements on the Earth’s surface. Here, the benefits of including GNSS in an earthquake early warning system are outlined and three different algorithms for integrating geodetic data into the USGS’s ShakeAlert system are identified.

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Last modified: Tuesday, 19-Mar-2019 16:41:51 UTC

 

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