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.
October 21, 2020
A magnitude 7.6 earthquake occurred at 20:54:39 UTC (12:54:39 AKDT) on October 19, 2020, 91 km SE of Sand Point, Alaska. For more information, see the USGS Earthquake Hazards Program event page or the Alaska Earthquake Center event page.
September 18, 2020
September 1, 2020
Dr. Charles (Chuck) Meertens retired from UNAVCO after 35 years of service to the geodetic community. Chuck was a founding employee of the UNAVCO Facility in 1984.
June 22, 2020
UNAVCO and The Incorporated Research Institutions for Seismology (IRIS), both university consortia, are interested in identifying member institutions that may be willing to host one or more functions of a future (post-2023) merged UNAVCO-IRIS organization.
July 22, 2020
A magnitude 7.8 earthquake occurred at 06:12:44 UTC (22:12:42 local) on July 22, 2020, 105 km SSE of Perryville, Alaska. The event occured within the Network of the Americas (NOTA) footprint.
June 24, 2020
A magnitude 5.8 earthquake occurred at 17:40:49 UTC (10:40:49 local) on June 24, 2020, 18 km SSE of Lone Pine, California. The event occured within the Network of the Americas (NOTA) footprint.
February 25, 2020
An 86-floor tall, steel-sculpted concrete building in Kuwait was shaken by a moment magnitude 7.3 earthquake far away at the Iran-Iraq border. The building’s shaking was captured by GPS sites, on the top of the building, and others near ground level. The ground shook with amplitudes of about 40 millimeters while the building shook up to 160 millimeters. Such observations can help to understand a building’s response to an earthquake and to improve building design in response to large stresses.
May 19, 2020
GNSS observations show surface horizontal displacements of 4 to 8 millimeters wobbling back and forth for more than five months and over thousands of kilometers before massive subduction zone earthquakes in Japan and Chile. Detailed modeling of the dense geodetic data for the Japan earthquake suggests a fluid-triggered slab pull helping to initiate a massive event.
March 03, 2019
The 21 August 2017 total solar eclipse across the United States blocked solar radiation and influenced the ionosphere and the rest of the atmosphere. The total electron content (TEC) in the ionosphere was measured with UNAVCO’s network of U.S. Global Positioning System (GPS)/ Global Navigation Satellite System (GNSS) ground-based sites and other geodetic sites across the country.
March 26, 2020
A novel combination of ground penetrating radar and terrestrial LiDAR scanning provides details about the state of seasonal snowpack in Colorado without destroying the snow layers. Testing shows high variability in volumetric liquid water contents. The rapid changes in the amount of liquid water occurred in small areas over short time periods. Understanding the state of a snowpack is important for managing water resources.
June 1, 2020
Geodetic stations at two coastal sites in Hong Kong were able to measure storm surge from Typhoon Hato in 2017 and Typhoon Mangkhut in 2018, using GNSS Interferometric Reflectometry (GNSS-IR). Adding more satellite signals and GNSS ground stations would provide greater coverage in space and time and greater accuracy to geodetic, storm-resistant, ground-based measurements of sea level, storm surge and even tsunami height..
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.
March 16, 2020
A new way to measure seafloor motions with Global Positioning System (GPS) in shallow seas is tested in Tampa Bay, Florida. Observations over many months indicate seafloor motions in three dimensions can be measured. The method can be applied for offshore oil operations, lakes around volcanic edifices, shallow submarine regions near the coasts that are above active subduction zones and for other applications.
Last modified: 2020-10-21 09:17:43 America/Denver