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.
HIGHLIGHTS
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Data Event Response to the October 30, 2020 M 7.0 - 15 km NNE of Néon Karlovásion, Greece Earthquake
November 17, 2020
A magnitude 7.0 earthquake occurred at 2020-10-30 11:51:27 (UTC) on October 30, 2020, off the coast of Greece and Turkey. For more information, see the USGS Earthquake Hazards Program event page
UNAVCO & IRIS Collaborate in Alaska
November 3, 2020
On 22 October, 2020, team members from UNAVCO and IRIS worked together to upgrade the power system and enclosure at UNAVCO station AC20 near Girdwood, AK.
Data Event Response to the September 30 to October 3, 2020, Westmorland, California, Earthquake Swarm
November 2, 2020
A magnitude 4.9 earthquake occurred at 00:31:27 UTC (16:31:27 local) on October 1, 2020, 4 km North East of Westmorland, California as part of an earthquake swarm from September 30, 2020 to October 3, 2020. For more information, see the USGS Earthquake Hazards Program event page.
You are not (ever!) alone: science, career, and caregiving in the time of COVID
October 26, 2020
This short panel discussion includes caregivers from academic administration, the National Science Foundation (NSF), UNAVCO, and IRIS sharing their personal experiences and practical resources for managing work and caregiving.
Data Event Response to the October 19, 2020 M 7.6 Sand Point, Alaska Earthquake
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.
Accessing UNAVCO / GAGE GNSS Data: Important update about Data Access Interface
September 18, 2020
The Data Access Interface-2 (DAI2) has been the primary method of searching and accessing GNSS data in the UNAVCO archive since 2007. It is a tool that was built in the Adobe Flash environment. Adobe announced in 2017 that Flash will reach end-of-life on December 31, 2020. UNAVCO will transition to a new interface based on GeoServer, Javascript and HTML5 technologies by this end-of-life date. UNAVCO will also provide guidance on the new data access portal through online short courses, Jupyter Notebooks, and online instructions as the new tool becomes available.
SCIENCE SNAPSHOTS
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Catching a Tall Building’s Response to an Earthquake with GPS
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.
Long Distance GNSS Wobbles Preceded Massive Subduction Zone Earthquakes
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.
Tracking Interactions of the Sun, the Moon and Earth with GNSS for the 2017 Great American Solar Eclipse
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.
Measuring Snow Properties with Laser Scanning and Radar
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.
Using GNSS Reflected Signals to Track Storm Surge
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..
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.
New Way to Measure Seafloor Motion with GPS in Shallow Seas
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: 2020-11-17 14:18:04 America/Denver
2020