Scientists developed a scalable solution for robust optical frequency transfer in noisy field environments using digital phase recording and multifunctional relay stations. The system achieved stable operation and fractional frequency instability of 2.9 x 10^-21 at 1 Hz over 2067 km fiber network.
Researchers from Peking University have reviewed the role of synthetic aperture radar (SAR) imaging geodesy in monitoring glacier velocity, which helps assess how glaciers respond to climate change. SAR offers a non-contact alternative to field-based approaches, providing high-resolution measurements over large and difficult-to-access ...
The WAG-H5-2#2508 demonstrated accuracy within stated uncertainties, closely matching manufacturer specifications and rivaling established laser gravimeters. Its long-term stability was also confirmed, enabling continuous, unattended monitoring and supporting hybrid gravity observation networks.
A magnitude 7.7 earthquake struck Myanmar, causing widespread damage and leaving communities to face years of recovery. Researchers mapped the fault behavior behind the event, finding a 500km surface rupture along the Sagaing Fault.
Researchers found that deformation across the region is dominated by crustal compression, with intense strain concentrated near Siberut Island and the Sumatran Fault Zone. The study provides critical information for updating seismic hazard assessments and long-term disaster planning.
The GREEN TALENT project organized four DemoHub workshops in Malta, Greece, Cyprus, and Bulgaria to foster collaboration, innovation, and hands-on learning. The workshops focused on addressing climate and biodiversity challenges, engaging island communities, policymakers, and experts.
New research uses SWOT satellite data to detect two-dimensional tsunami wave patterns near the earthquake's source, offering critical insight for coastal risk evaluation. The study found that trailing tsunami waves are linked to an earthquake rupture occurring less than 10 kilometers beneath the trench.
A research team analyzed 2.2 million thunderstorm events to identify a physical explanation for their formation. The study found that differences in soil moisture generate near-surface winds, leading to intense thunderstorms. High-resolution satellite measurements of soil moisture were crucial for this analysis.
Researchers developed a holistic monitoring system to investigate lake ecosystems' sensitivity to boat traffic, weather, and climate change. The system, WAMOS, accurately analyzes wave patterns and assigns causes, enabling precise modeling of ecosystem effects.
Variations in Earth's gravity field on interannual to decadal timescales reveal discrepancies that cannot be fully explained by surface processes. Comparative analyses of gravity and magnetic field data reveal a close connection between the two systems, with periodic signals associated with core mass transfer.
Researchers from Ohio State University used Starlink and OneWeb satellites to deliver accurate positioning in the Arctic, reducing errors from over a kilometer to just 27 meters. This technology has the potential to provide reliable navigation alternatives for various industries, including transportation and telecommunications.
A new study on the March 2025 Mandalay earthquake reveals that an unusually thick, low-velocity fault zone enabled a supershear rupture to sustain for hundreds of kilometers. This behavior often occurs on simple, straight faults like the San Andreas and Sagaing faults.
Researchers from TU Graz have documented and analyzed Buddhist temples in the remote Dolpo region of Nepal, creating 3D models and 2D plans to preserve their history. The study provides insights into the sacred architecture of the region, categorizing existing buildings in their historical and art-historical context.
Gordon's pioneering work revealed diffuse plate boundaries and true polar wander, advancing fundamental understanding of tectonic plates. He also developed widely used global plate motion models, including NUVEL and MORVEL.
The new textbook bridges the gap between traditional divisions in teaching and practicing tectonics, seismology, geodesy, and geodynamics. It provides a basis to explore fundamental connections between the planet's deep interior and surface.
Researchers at TUM Institute of Engineering have accurately measured the Earth's axial movement using a ring laser over a 250-day experiment. The results reveal small wave movements in the precession circle of the Earth's axis, known as nutation, with varying degrees of intensity.
Researchers at PolyU have developed a novel technique to measure global ocean mass change, revealing a 90 mm surge in sea-level rise over the past 30 years. The study attributes this acceleration to increased ocean mass and land ice melt, particularly in Greenland.
Rice University geophysicist Richard Gordon has been honored with the Geological Society of America's Woollard Award for his transformative work on global plate motions and plate boundary deformation. He is recognized for shedding light on diffuse oceanic plate boundaries, true polar wander, and standard global plate motion models.
A new study published in Ecology reveals traditional methods of tracking animal movement may be underestimating the actual distance travelled by whales, particularly for marine species.
A new study reveals that global ocean analysis products can achieve centimeter-level accuracy in seafloor positioning, comparable to traditional methods. This innovation could significantly reduce costs and logistical challenges in marine geodetic surveys.
Researchers develop fiber-based O-TWTFT system, offering unparalleled stability across vast distances. Fiber optics enables applications such as redefining the second and precise geodesy.
A new study reveals that global ocean analysis products can replace expensive in-situ sound speed measurements for precise seafloor positioning. Global ocean analysis achieves centimeter-level accuracy, comparable to traditional methods, and reduces costs and logistical challenges in marine geodetic surveys.
A new study introduces a machine learning-based approach to improve GNSS ambiguity resolution, achieving an 83% success rate in independent testing. The method leverages multiple diagnostic metrics into a Support Vector Machine model, enhancing reliability and reducing convergence time prediction errors.
Researchers at Graz University of Technology developed a holistic solution for structural monitoring, combining various technologies to provide usable findings for service life forecasts and proactive maintenance planning.
A study published in the Journal of Geophysical Research: Solid Earth reveals that droughts and associated water loss are the primary cause of South Africa's land uplift. This finding challenges the previously assumed mantle flow explanation and highlights the importance of monitoring groundwater reserves due to climate change.
A recent PNAS study suggested Mars has a significant amount of liquid water in its mid-crust, but LASP Senior Research Scientist Bruce Jakosky challenges this conclusion. Using InSight mission data, the team found that the presence of water is not required by the data.
Scientists can now utilize communication signals from mega-constellations to track changes in the Earth's gravitational field and observe weather phenomena like heavy rain or sea level changes in real time. The accuracy of this method is currently limited to 54 meters, but researchers aim to improve it to just a few meters.
Since the turn of the millennium, glaciers worldwide have lost around 273 billion tonnes of ice per year, corresponding to about five and a half times the volume of Lake Constance. The loss of ice from glaciers has led to a rise in sea level of 18 millimetres, making it the second strongest driver of sea level rise after ocean warming.
Scientists at KTH Royal Institute of Technology have developed a refined method for measuring and predicting gravity changes as the Nordic region rises. The study found that the Ferroscandinavian peninsula's land mass is more dense than previously known, with an upper mantle density of approximately 3,546 kilograms per cubic meter.
Researchers found evidence that repeated earthquakes like the 2024 Noto Peninsula earthquake shaped the region's topography. The study used satellite radar images to measure displacements caused by the earthquake, resulting in over 4m of uplift and emergence of new terraces along the northern coast.
A new framework evaluates tsunami risk to seaports and the global port network, estimating potential economic losses in trade caused by port disruptions. The study found that a Manila Trench tsunami could damage up to 15 international seaports under present-day sea-level conditions.
Researchers at TU Graz have achieved more accurate orbit predictions for satellites using satellite laser ranging, combining gravity field measurements with SLR. This allows for a better understanding of existing water masses and safer orbits for space debris.
A novel technique in deformation monitoring uses dual-base station constraint to improve precision consistency across strip regions. The method demonstrates notable improvements in precision consistency, marking a key development in GNSS deformation monitoring.
A new study introduces a unified approach for reducing multipath effects in satellite navigation, boosting positioning precision by up to 25% across GPS, Galileo, and BDS-3 systems. The technique employs an interoperable Multipath Hemispherical Map, significantly enhancing spatial resolution and modeling efficiency.
Research finds climate change is slowing down Earth's rotation by a few milliseconds, with implications for navigation in space. The study also reveals polar motion changes caused by melting ice sheets and internal movements of the Earth's core.
Researchers have successfully synchronized a 220-year-old map of Southern Germany from the Napoleonic era with modern databases, allowing for tracking of historical and environmental changes. The map was produced in haste during the wars, resulting in errors that were corrected through geospatial analysis.
The University of Bonn has developed an AI software that can simulate the growth of field crops using drone photos. This allows farmers to estimate parameters such as leaf area or yield with high accuracy, and even predict the outcome of certain interventions. The software also focuses on polycultures, which can boost yields by reducin...
Researchers detected clear electromagnetic anomalies in satellite data 12-19 days before the 2023 Turkey earthquakes, indicating potential precursors. These findings suggest the possibility of developing early warning systems for earthquakes.
Researchers developed a novel method to overcome limitations in traditional seafloor positioning methods. The SESSP approach enables simultaneous estimation of both sound speed profile parameters and seafloor geodetic coordinates with high accuracy.
The National Oceanic and Atmospheric Administration has awarded Oregon State University $6.5 million to advance the modernization of the National Spatial Reference System. The funding will support research at the new Geospatial Center for the Arctic and Pacific, which aims to improve resilience to coastal and seismic hazards through en...
Researchers analyzed global tidal data to better understand the characteristics of the M3 ocean tide. The study found varying levels of amplitude across different regions, with some areas experiencing significant increases in M3 amplitude due to global sea level rise.
Researchers from the University of Bonn have developed a new method to calculate global water distribution, combining satellite data with hydrological models. The study reveals that droughts are significantly more common across the world than previously thought, with localized droughts often missing from satellite data.
A research team used space geodetic observations to study seasonal and intra-seasonal signal variations in the Earth's surface loads, finding subsidence and uplift in regions of positive and negative mass anomalies. The results indicate that space geodesy offers an effective method for studying surface loads and crustal movements.
A team from Leibniz University Hannover and University of Bremen confirmed the equivalence principle, proving passive and active gravitational mass are always equivalent, regardless of composition. This finding contradicts quantum theory's prediction of a violation, with accuracy 100 times greater than previous studies.
Researchers in China have developed a new theoretical framework to understand and predict air pollution, highlighting the complexity of coal combustion and vehicle exhaust interactions. The Air Pollution Complex is a holistic approach that considers multiple emission sources and chemical processes.
African Superplume is responsible for rift-parallel deformation and seismic anisotropy in the East African Rift System, contradicting previous theories on plate-driving forces. The study uses 3D thermomechanical modeling to explain this phenomenon.
Researchers at the University of Bonn have developed a cost-effective method to measure river levels around the clock using a GNSS antenna and Raspberry Pi microcomputer. The device is capable of transmitting data continuously via mobile communication, making it suitable for area-wide flood warning systems.
Magma is rising to about 6 miles from a depth of 12 miles, causing earthquakes and surface deformation. The new approach could lead to earlier detection of volcanic unrest in Alaska.
A team of scientists from the University of Exeter has made a key breakthrough in predicting fluctuations in the rotation of the Earth and the length of the day. They used mathematical modeling to show that changes in the atmosphere can be predicted more than a year in advance, linking geodesy with climate prediction.
A team led by Dr. Stamps will investigate the physics of continental rifting in Uganda's East African Rift System, where magma-poor rifts form without surface volcanoes. The research aims to answer how strain is accommodated during upper crustal extension and what role fluid-filled faults or pre-existing structures play.
Several NASA individuals were recognized by the American Geophysical Union as 2021 union honorees for their outstanding work in scientific research, education, communication, and outreach. Brooke Medley received the Cryosphere Early Career Award, while Suresh Adhikari was honored with the John Wahr Early Career Award.
Researchers analyzed seismic data to uncover the composition of Elysium Planitia's shallow subsurface, revealing a regolith layer and basaltic rocks. The findings provide insights into Mars' geological history and properties that will inform future landed missions.
Researchers using satellite geodesy and InSAR imagery found the Arabian side of the Dead Sea Transform fault has been moving steadily northwards at around five millimeters per year. The studies suggest that large earthquakes may be less frequent near the southern end of the Gulf, but more investigations are needed for a resilient city.
Researchers have determined the crustal thickness of Mars for the first time, with values ranging from 20 to 39 kilometers. This independent measurement allows for a precise map of the planet's crust across its entire surface.
The InSight mission provides clues to Mars' composition, mapping its crust, mantle, and core for the first time. Researchers find a multi-layered crust with an average thickness of 24-72 kilometers and a thick lithosphere beneath.
The new IHRS unifies geodetic measurements by establishing a universally accepted zero level, based on the Earth's gravity field. This replaces the mean sea level, which had inconsistent definitions across countries, causing problems in measuring heights such as Mount Everest's.
Researchers have successfully connected two optical atomic clocks in Italy and Japan, separated by 8700 km, using radio telescopes observing distant stars. This achievement could provide a global infrastructure for high-precision timekeeping and unlock new possibilities for studying fundamental physics and general relativity.
The study found that during the pandemic, locked-down areas experienced improved GPS data quality due to reduced vehicle noise, enabling more precise elevation changes and better flood risk assessments. The researchers recommend installing GPS sensors in less noisy environments.
Researchers at Kyushu University analyzed data from NASA's InSight lander to determine the sources of different types and frequencies of Martian microtremors. The study found that low-frequency P-waves were related to changes in wind and solar irradiation, while higher-frequency ambient noises were dominated by lander vibration.
Researchers used 3D magnetotelluric imaging to image magma reservoirs beneath Weishan volcano, revealing vertically distributed low-resistivity anomalies and melt fractions of over 15%. The findings suggest the volcano is in an active stage with potential for future eruptions.