U N A V C O , A N O N - P R O F I T U N I V E R S I T Y - G O V E R N E D C O N S O R T I U M , F A C I L I T A T E S G E O S C I E N C E R E S E A R C H A N D E D U C A T I O N U S I N G G E O D E S Y.
Transforming understanding of Earth systems and hazards using geodesy.
June 23, 2017
Cryoconite holes are pockets of life completely encased in otherwise barren glacial ice. These features are formed from when dust blown onto a glacier melts a small, largely isolated hole that can function as its own tiny ecosystem. Unmanned Aircraft System (UAS) surveys will help to quantify the spatial distribution and size variability of cryocontie communities by collecting orthorectified imagery and feature mapping.
May 10, 2017
To improve data discovery, we have produced a new video series guiding users through accessing each geodetic data type available through UNAVCO's Geodetic Data Services. The videos both provide a broad overview of data available via our archives and show new users specifically how to access each distinct data type.
May 12, 2017
In response to the M6.2 earthquake 79km SSW of Acajutla, El Salvador, on 2017-05-12, high-rate 1-sps (1 Hz) GPS/GNSS data are being downloaded from five COCONet stations within 500 km of the epicenter for a ±2-hour period around the event.
May 5, 2017
In response to the Mw 6.2 earthquake 88 km WNW of Skagway, Alaska on 2017-05-01, high-rate 1-sps (1 Hz) GPS/GNSS data are being downloaded from four PBO stations near the epicenter for a 7-day period around the event (day of event ± 3 days).
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.
June 15, 2017
A moment magnitude 7.8 earthquake ruptured a major subduction zone boundary between the Nazca and the South American plates just offshore of Ecuador on 16 April 2016. Synthetic aperture radar (SAR) data and model analysis show about 2.5 meters of slip at about 20 kilometers depth. The event implies shorter recurrence times for earthquakes in the region.
May 18, 2017
A new method to compute total electron content (TEC) in the ionosphere to measure perturbations caused by tsunami waves has been shown to work retrospectively for tracking tsunami waves around Hawaii from the 2012 Haida Gwaii, British Columbia M7.8 earthquake.
July 11, 2017
Greenland’s ice and snow mass has been melting at an accelerated rate for many years. A network of GNSS sites, set-up on coastal bedrock, has been utilized to measure a huge outflow of ice and water in 2012 and 2010 from the Rink Glacier. The horizontal motion at the GNSS site captures a solitary mass transport wave traveling coastward down the glacier in the summers of those two melt years.
June 12, 2013
Groundwater withdrawal during the 2007 to 2010 drought in the San Joaquin Valley in California caused a great deal of subsidence. Geodetic, water level and geologic data were used to determine the amount of inelastic deformation. The results suggest that most of the deformation was inelastic during the drought and thus the volume of the aquifer has been reduced, leaving less storage capacity for water in the future.
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.
June 26, 2017
The Mosul Dam on the Tigris River in Iraq was built on weak rock that is dissolving due to water infiltration since it was built. Satellite imagery shows the dam subsiding over 6 years. The subsidence increases the risk of dam failure, which would affect more than a million people living nearby and everyone who relies on the dam for energy and water.
Last modified: Wednesday, 12-Jul-2017 17:45:04 UTC