Results 101 to 110 of about 78,753 (224)

A History of UNAVCO: Four Decades of Advancing Geodesy

Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.
Abstract UNAVCO was a university‐governed consortium funded by the National Science Foundation (NSF), with support from the National Aeronautics and Space Administration (NASA) and the United States Geological Survey (USGS), to support geoscience research and education using geodesy.
Emily E. Zawacki, Donna J. Charlevoix, Charles M. Meertens, Jeffrey T. Freymueller, Tonie van Dam   +4 more
wiley   +1 more source

Changes in Crater Morphology Associated With Volcanic Activity at Telica Volcano, Nicaragua

Geochemistry, Geophysics, Geosystems, 2020
Volcanic summit craters are typically noted to form by roof collapse into a depressurized magma chamber or by explosive excavation. Recent examples of effusive activity (e.g., Kilauea Volcano, Hawai'i) allowed specifically for quantification of the ...
Catherine Hanagan, Peter C. La Femina, Mel Rodgers   +2 more
doaj   +1 more source

Gravitational sliding of the Mt. Etna massif along a sloping basement [PDF]

, 2018
Geological field evidence and laboratory modelling indicate that volcanoes constructed on slopes slide downhill. If this happens on an active volcano, then the movement will distort deformation data and thus potentially compromise interpretation.
A Bonaccorso, A Bonaccorso, A Bonaccorso, A Bonaccorso, A Bonforte, A Bonforte, A Borgia, A Borgia, A Borgia, A Cortés, A Friant Le, A Marquez, Andy Pitty, B Behncke, B Voight, B Voight, Benjamin van Wyk de Vries, BJG Upton, C Federico, F Guglielmino, F Obrizzo, F Obrizzo, G Norini, G Nunnari, G Puglisi, J-L Got, JB Murray, JB Murray, JB Murray, JB Murray, John B. Murray, L Siebert, L Wooller, Luke Wooller, M Aloisi, M Aloisi, M Liotta, M Neri, M Neri, MH Anders, MP Poland, O Merle, P Allard, P Lundgren, Phil Sargent, S Alparone, S Branca, TJO Sanderson, TM Mitchell, V Acocella, V Acocella, WP Schellart   +51 more
core   +4 more sources

Magma Ascent and Accumulation Drives Surface Deformation and Ring Fault Seismicity Preceding the 2024 Eruption of Fernandina Volcano, Galápagos Islands

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 12, December 2025.
Abstract At caldera volcanoes, ring faults can play a key role in controlling the dynamics of unrest and patterns of associated surface deformation and seismicity. Here we show that the March 2024 eruption of Fernandina volcano was preceded by a 2.5‐year episode of magma accumulation, driving surface uplift and asymmetric seismicity on a ring fault ...
Andrew F. Bell, Susanna K. Ebmeier, Stephen Hernandez, Eliot Eaton, Xuesong Zhang, Peter LaFemina, Christopher Bean, Mario Ruiz   +7 more
wiley   +1 more source

Monitoring lava lake fluctuations and crater refilling with continuous laser rangefinders

Journal of Applied Volcanology
The U.S. Geological Survey’s Hawaiian Volcano Observatory (HVO) has developed a new method to continuously monitor lava lake elevations. Since 2018, HVO has stationed a laser rangefinder on Kīlauea’s caldera rim.
E. F. Younger, W. Tollett, M. R. Patrick
doaj   +1 more source

Eruptions at Lone Star geyser, Yellowstone National Park, USA: 2. Constraints on subsurface dynamics [PDF]

, 2014
Author Posting. © American Geophysical Union, 2014. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution.
Glen, Jonathan M. G., Hurwitz, Shaul, Johnston, Malcolm J. S., Karlstrom, Leif, Manga, Michael, McPhee, Darcy, Murphy, Fred, Rudolph, Maxwell L., Sohn, Robert A., Soule, Samuel A., Vandemeulebrouck, Jean   +10 more
core   +1 more source

Nakhlite Emplacement as Constrained by X‐Ray Computed Tomography and 3D Quantitative Textural and Petrofabric Analyses

Journal of Geophysical Research: Planets, Volume 130, Issue 12, December 2025.
Abstract Nakhlites, clinopyroxene‐rich rocks, are the largest single‐origin suite of samples from Mars. Despite extensive study to discern their petrogenetic histories, nakhlite emplacement mechanisms and environments are not well‐constrained, and it is unknown whether they represent intrusive or extrusive igneous rocks, or a combination.
Sierra R. Ramsey, Piper Irvin, Arya Udry, Scott A. Eckley, Amanda Ostwald, Richard A. Ketcham   +5 more
wiley   +1 more source

Static stress implications for Kīlauea volcano activity after the 2018 Hawai'i earthquake

Geodesy and Geodynamics
The MW6.9 thrust-faulting earthquake in Hawai'i on May 4, 2018, occurred near the Kīlauea shield volcano. We use 57-day-long continuous Global Positioning System (cGPS) data and 6-day-long semi-continuous GPS data to develop a detailed coseismic slip ...
Lupeng Zhang, Su Tian
doaj   +1 more source

Products of Littoral Explosions and their Formation Conditions: A Case Study from Episode 58 of Puʻu ʻŌʻō, Kīlauea Volcano, HI [PDF]

, 2020
Rebecca deGraffenried, B. F. Houghton, Brett L. Walker, Olliander Beucler, Joy Cline, Wendy Cockshell, Krista Evans, Adrien J. Mourey, William Nelson, Caroline Tisdale, Jason Tremblay, Malia Zinn   +11 more
openalex   +1 more source

The communication of volcano information in New Zealand – a narrative review

New Zealand Journal of Geology and Geophysics, Volume 68, Issue 4, Page 591-608, December 2025.
ABSTRACT Communication of volcano information is critical for effective volcanic risk management. A variety of information is communicated to inform decisions and guide actions for planning, preparedness, and response. Such information needs to be reliable, and fit‐for‐purpose across different stages of volcanic activity (quiescence, unrest, short or ...
Manomita Das, Julia S. Becker, Emma E. H. Doyle, Danielle Charlton, Mary Anne Clive, Janine Krippner, Lauren J. Vinnell, Craig Miller, Carol Stewart, Hollei Gabrielsen, Sally H. Potter, Graham S. Leonard, David M. Johnston, Kelvin Tapuke, Nico Fournier, Sara K. McBride   +15 more
wiley   +1 more source