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.
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).
May 4, 2017
An episodic tremor and slow slip (ETS) event is an episode over a discreet period of time of short bursts of seismic energy called tremor plus slow slip on the fault. The slip is so slow that it cannot be felt by humans and does not record the characteristic signature of an earthquake on a seismometer.
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.
May 23, 2017
An analysis of borehole strainmeter data from Plate Boundary Observatory sites in the western United States for 144 earthquakes from 2004 to 2014 reveals correlations between the peak strain from these events with distance from the hypocenter and the earthquake magnitude.
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.
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.
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.
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.
March 14, 2017
If you want to know everything about the methods and data analysis centers for GPS networks in North America and the Caribbean, this is the review you should read. The review describes methods for determining position time series, velocities and other parameters from 2170 stations.
Last modified: Monday, 22-May-2017 16:54:34 UTC