Results 61 to 70 of about 2,053 (253)

Building a Continental‐Scale Geodetic Network: The Plate Boundary Observatory (PBO)

Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.
Abstract The Plate Boundary Observatory (PBO) transformed the use of geodesy in North America to study crustal deformation and plate boundary processes by establishing a continental‐scale, standardized, open‐access geodetic network. Built and operated by UNAVCO between 2003 and 2018 as part of the National Science Foundation (NSF)‐funded EarthScope ...
Emily E. Zawacki, Michael E. Jackson, Glen S. Mattioli, David J. Mencin, Karl Feaux, Donna J. Charlevoix   +5 more
wiley   +1 more source

Validation of ShakeMaps Created From Global Navigation Satellite System (GNSS) Velocities

Earthquake Spectra, Volume 42, Issue 3, August 2026.
Ground velocity observations generated through a time difference of Global Navigation Satellite Systems (GNSS) phase observables and orbits have been shown to be comparable to seismic recordings without clipping during intense ground motions. Computing GNSS velocities is also computationally scalable and increases the density of ground motion ...
Jensen V. DeGrande, Brendan W. Crowell
wiley   +1 more source

Rheology and Flow Emplacement Processes of the 1954 Lavas, Mount Ngauruhoe

, 2010
The rheology and emplacement dynamics of basaltic and rhyolitic lava flows have been studied extensively, leading to the development of numerous rheological and flow behaviour models; however, the flow dynamics of more intermediate composition lavas ...
Sanders, Fiona
core  

Experimental and modeling study of fluid pressure-driven fractures in Darley Dale sandstone

, 2004
We report measurements of acoustic emissions (AE) generated during formation and growth of pressure driven fractures in cylindrical samples of Darley Dale sandstone that were co-axially pre-drilled in order to allow an internal pressure to be applied.
Hazzard, J, Vinciguerra, S., Meredith, P. G., Vinciguerra, S, Meredith, PG, Hazzard, J.   +5 more
core   +1 more source

Evolving and Sustaining Ocean Best Practices and Standards for the Next Decade

Frontiers in Marine Science, 2019
The oceans play a key role in global issues such as climate change, food security, and human health. Given their vast dimensions and internal complexity, efficient monitoring and predicting of the planet’s ocean must be a collaborative effort of both ...
Jay Pearlman, Mark Bushnell, Laurent Coppola, Johannes Karstensen, Pier Luigi Buttigieg, Francoise Pearlman, Pauline Simpson, Michele Barbier, Frank E. Muller-Karger, Cristian Munoz-Mas, Peter Pissierssens, Cyndy Chandler, Juliet Hermes, Emma Heslop, Reyna Jenkyns, Eric P. Achterberg, Manuel Bensi, Henry C. Bittig, Jerome Blandin, Julie Bosch, Bernard Bourles, Roberto Bozzano, Justin J. H. Buck, Eugene F. Burger, Daniel Cano, Vanessa Cardin, Miguel Charcos Llorens, Andrés Cianca, Hua Chen, Caroline Cusack, Eric Delory, Rene Garello, Gabriele Giovanetti, Valerie Harscoat, Susan Hartman, Robert Heitsenrether, Simon Jirka, Ana Lara-Lopez, Nadine Lantéri, Adam Leadbetter, Giuseppe Manzella, Joan Maso, Andrea McCurdy, Eric Moussat, Manolis Ntoumas, Sara Pensieri, George Petihakis, Nadia Pinardi, Sylvie Pouliquen, Rachel Przeslawski, Nicholas P. Roden, Joe Silke, Mario N. Tamburri, Hairong Tang, Toste Tanhua, Maciej Telszewski, Pierre Testor, Julie Thomas, Christoph Waldmann, Fred Whoriskey   +59 more
doaj   +1 more source

A Mountain Glacier Perspective on the Bipolar Seesaw

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract A global record of mountain glacier terminations during the last deglaciation (∼19–11 ka) dated by a large, uncurated data set of cosmogenic‐nuclide exposure ages highlights a statistically significant asynchrony in termination ages between the Northern and Southern Hemispheres.
Joseph P. Tulenko, Greg Balco
wiley   +1 more source

Satellite‐Based Assessment of Methane Emissions From the Darvaza Gas Crater

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract Methane is a potent greenhouse gas, and the Darvaza crater in Turkmenistan is a rare, persistent emitter. There are uncertainties regarding its formation date (either 1963 or 1971), fire ignition, and the fire's influence on methane release. Using historical Landsat imagery, we reconstruct the fire history, identifying that combustion began ...
Adriana Valverde, Itziar Irakulis‐Loitxate, Javier Gorroño, Zhipeng Pei, Javier Roger, Luis Guanter   +5 more
wiley   +1 more source

Volcanology of tuff rings at Kellyville, Onewhero and Bombay, South Auckland Volcanic Field

, 2011
The South Auckland volcanic field hosts 82 volcanic centres over an area of approximately 300 km2 in the Pukekohe, Bombay, Tuakau, Pukekawa and Onewhero regions. The intraplate, monogenetic basaltic volcanic field was active between 1.59 and 0.51 Ma, and
Gibson, April Christina
core  

The emplacement of an obsidian dyke through thin ice : Hrafntinnuhryggur, Krafla Iceland. [PDF]

, 2009
An eruption along a 2.5 km-long rhyolitic dyke at Krafla volcano, northern Iceland during the last glacial period formed a ridge of obsidian (Hrafntinnuhryggur).
Castro, Jonathan M., Tuffen, Hugh
core  

Drying Effect of Landfalling Tropical Cyclones

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract The high precipitation efficiency of tropical cyclones (TCs) is theorized to dehydrate the atmosphere, a process with important climate implications that has yet to be confirmed by direct observational evidence. Using satellite and reanalysis data, this study statistically examines the drying effect of landfalling TCs. Results indicate a local
Yazhu Yang, Zhanhong Ma, Yanluan Lin, Yufeng Zhou, Jianfang Fei   +4 more
wiley   +1 more source