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Transforming understanding of Earth systems and hazards using geodesy.

 
 

HIGHLIGHTS

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Join UNAVCO at AGU 2016

Join UNAVCO at AGU 2016

November 29, 2016

Come find us at Booth #523! Our booth is staffed by UNAVCO employees from all groups within the organization, as well as by 2016 UNAVCO interns.

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GPS observations of post-seismic deformation from the 3 Sep 2016, Mw 5.8, Pawnee, Oklahoma, earthquake

GPS observations of post-seismic deformation from the 3 Sep 2016, Mw 5.8, Pawnee, Oklahoma, earthquake

November 22, 2016

This project came about quickly after the 3 September 2016, Mw 5.8, Pawnee, Oklahoma, earthquake. It is collaboration between the University of Memphis, University of Oklahoma (OU), and Oklahoma Geological Survey (OGS). The project deployed eight GPS stations around the causative Sooner Lake fault, in order to measure the years-long relaxation of the crust (postseismic deformation) after the September earthquake.

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Data Event Response to the 13 November 2016 M7.8 Kaikoura, New Zealand Earthquake

Data Event Response to the 13 November 2016 M7.8 Kaikoura, New Zealand Earthquake

November 14, 2016

In response to the M7.8 earthquake 7.8 earthquake 53km NNE of Amberley, New Zealand on 2016-11-13 11:02:56 (UTC), UNAVCO has processed high rate one-sample-per-second (1-sps or 1 Hz) borehole strainmeter data from all borehole strainmeters in the Plate Boundary Observatory (PBO). The fully processed 1-sps borehole strainmeter (BSM) dataset spanning the time period of this event is now available.

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Middle School Girls Learn About Geodesy at Mount St. Helens

Middle School Girls Learn About Geodesy at Mount St. Helens

September 8, 2016

The GeoGirls program, now in its second year, is a five-day science and technology field camp for middle school girls on Mount St. Helens. UNAVCO again supported the program with staff time, introducing the girls to geophysics via the Plate Boundary Observatory.

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SCIENCE SNAPSHOTS

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Probabilities of Large Earthquakes in Alaska

Probabilities of Large Earthquakes in Alaska

August 11, 2016

Estimates of the probabilities of a magnitude greater than 9.0 earthquake for the Aleutian Islands are about 6.5 to 12 percent over the next 50 years. Such an event poses obvious earthquake and tsunami risks for Alaska and tsunami risks for western North America and Hawaii.

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2014 South Napa Earthquake Ruptures Surface and Keeps Slipping Long After

2014 South Napa Earthquake Ruptures Surface and Keeps Slipping Long After

November 10, 2016

The Mw 6.0 South Napa earthquake created measurable surface rupture over about 12 kilometers on several active strands of the West Napa fault zone (WNFZ). Field observations and airborne and satellite-based imagery show earthquake deformation and post-earthquake deformation. The complex fault rupture and post-earthquake fault slip has implications for estimating earthquake hazards.

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GPS Tracks Atmospheric Water Vapor That Fuels Storms

GPS Tracks Atmospheric Water Vapor That Fuels Storms

November 21, 2016

A network of GPS stations measures atmospheric water vapor over the continental United States with effective spatial and temporal resolution. The data tracks annual and seasonal moisture transport from the Gulf of Mexico into the Great Plains and the moisture variability related to the North American monsoon. These measurements are valuable for severe weather forecasts.

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GPS Measurements of Bedrock Uplift in Greenland Improve Ice Loss Estimates

GPS Measurements of Bedrock Uplift in Greenland Improve Ice Loss Estimates

October 28, 2016

Global Positioning System (GPS) measurements of the uplift of the ground surface beneath the Greenland ice sheet is critical to determining the amount of ice mass that has been lost since the Last Glacial Maximum (LGM). The GPS data show larger uplift rates than previously recognized and suggest that satellite studies have underestimated the ice mass loss by about 20 gigatons per year or about 1.5 meters of sea level rise since the LGM.

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Sea Level Rise on the U.S. Gulf Coast

Sea Level Rise on the U.S. Gulf Coast

February 6, 2013

The Mississippi Delta along the Gulf Coast of the United States is a major site of sediment deposition from the Mississippi River and conversely a major site of wetland loss from rising seas and subsidence. There is debate about how much and when the delta has risen or fallen due to deposition, subsidence, sea level change, and erosion.

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Subsiding Atlantic Coast Due to Geologic Adjustment and Groundwater Extraction

Subsiding Atlantic Coast Due to Geologic Adjustment and Groundwater Extraction

November 28, 2016

Long-term records from GPS stations along the Atlantic Coast of North America show long term subsidence due to geologic adjustments and short term subsidence due to human-related groundwater extraction. These measurements are critical for understanding water use, sediment structure and sea level rise. In particular, knowing the rate of subsidence or uplift along this populated coastal plain could help mitigate flooding and inform land use.

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Improving Local Tsunami Warnings by Combining Geodetic and Seismic Observations

Improving Local Tsunami Warnings by Combining Geodetic and Seismic Observations

November 29, 2016

Combining geodetic and seismic observations can reduce the amount of time needed to assess the tsunami intensity generated by a large magnitude thrust fault earthquake along a subduction zone. Through retrospective analysis of four tsunamigenic large earthquakes in Japan and Chile, the tsunami potential at the local coast was estimated within less than 2 minutes.

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Last modified: Wednesday, 30-Nov-2016 17:09:01 UTC

 

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