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Transforming understanding of Earth systems and hazards using geodesy.

 
 

HIGHLIGHTS

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Data Event Response to the December 20, 2018 M 7.3 Earthquake, 82km W of Nikol'skoye, Russia

Data Event Response to the December 20, 2018 M 7.3 Earthquake, 82km W of Nikol'skoye, Russia

December 20, 2018

UNAVCO is downloading high-rate 1-sps (1 Hz) data from the few PBO/NOTA GPS/GNSS stations near the epicenter of this event. In addition, 5-sps (5 Hz) data are being downloaded from available sites. Due to the remote locations and limited comms of these sites, data will take longer than usual to be acquired. A station map is shown in Figure 2; this map will be updated after data are acquired. When downloaded, these data are available from the UNAVCO high rate data ftp site.

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Subduction Below Extreme Sedimentation – A Multidisciplinary Transect from the Ganges-Brahmaputra Delta to the IndoBurma Backarc

Subduction Below Extreme Sedimentation – A Multidisciplinary Transect from the Ganges-Brahmaputra Delta to the IndoBurma Backarc

December 21, 2018

To gain a better understanding of the underlying fault system and the entire IndoBurman subduction zone, researchers are installing a large broadband seismic array across Bangladesh, India, and into Myanmar. In addition, cGPS has been installed within the array to better determine the surface deformation across the entire system. In Bangladesh the seismometers were spaced at 5-10km to image shallow as well as deep crustal features, and six continuous GPS (cGPS) station were installed along a 100km portion of this array.

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Investigating the Effectiveness of Cloud Services for Geodetic and Seismic Data Management

Investigating the Effectiveness of Cloud Services for Geodetic and Seismic Data Management

December 21, 2018

UNAVCO and IRIS are in the third year of an NSF EarthCube project called GeoSciCloud that is evaluating the potential of hosting large facility-scale services in the commercial cloud environment (Amazon AWS) and the private cloud (NSF XSEDE Jetstream resources at Texas Advanced Computing Center and Indiana University).

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RESESS Interns Presented at AGU

RESESS Interns Presented at AGU

December 17, 2018

UNAVCO's 2018 RESESS interns traveled to Washington, D.C. from December 10 - 14 to present their summer research projects at the 2018 American Geophysical Union (AGU) Fall Meeting.

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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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GPS Weighing the Loss of Antarctic Ice and the Squishy Mantle Beneath

GPS Weighing the Loss of Antarctic Ice and the Squishy Mantle Beneath

October 26, 2018

GPS measurements in the Amundsen Sea Embayment show a rapid rise of as much as 41 millimeters per year. One reason for the rapid rise is a softer, more pliant mantle beneath the land surface. This may have implications for global sea level change forecasts.

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Measuring Vegetation Health Through a California Drought with Geodetic Techniques

Measuring Vegetation Health Through a California Drought with Geodetic Techniques

August 8, 2018

The health of wild vegetation during the California drought of 2012 to 2014 was measured with microwave-wavelength reflected Global Positioning System (GPS) measurements from hundreds of sites that are part of the EarthScope Plate Boundary Observatory. The geodetic data is compared to optical-wavelength measurements at collocated sites. The observations and comparisons show that three years of drought stunted growth and reduced the growing season with the late precipitation in the third year of the drought being particularly devastating to vegetation. These methods can help gauge future conditions and inform environmental impacts on humans and nature.

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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, 15-Jan-2019 21:28:51 UTC

 

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