Results 11 to 20 of about 93,230 (195)

Gravity and geodesy of Concepción Volcano, Nicaragua [PDF]

, 2013
Concepción is currently the most active composite volcano in Nicaragua. Ash explosions of small to moderate size (volcano explosivity index 1–2) have occurred on a regular basis. Gravity data collected on and around the volcano between 2007 and 2010 confirm that a younger cone is built atop an older truncated edifice of denser material ...
Saballos, José A., Malservisi, Rocco, Connor, Charles B., La Femina, Peter C., Wetmore, Paul H.   +4 more
openaire   +3 more sources

Double Trouble: Two Active Magma Reservoirs Identified at Masaya Volcano, Nicaragua, Using Satellite Geodesy

Geophysical Research Letters
We analyze and model ground deformation at Masaya volcano, Nicaragua, using Sentinel‐1 Interferometric Synthetic Aperture Radar (InSAR) time series spanning January 2018–February 2024. Time series show the Masaya Central Reservoir (MCR) experienced ∼3 cm
E. Johnson, Y. C. Kim, C. Wauthier
doaj   +2 more sources

Volcano-tectonic interaction at Santorini. The crisis of February 2025. Constraints from geodesy

Geophysical Journal International
SUMMARY In February 2025, a strong seismic crisis occurred 35 km northeast of Santorini, an active volcano located in South Cyclades, Greece, a region of distributed extensional active faulting. The Global Navigation Satellite System (GNSS) data shows an inflation of the volcano since August 2024.
Pierre Briole, Athanassios Ganas, Varvara Tsironi   +2 more
exaly   +2 more sources

Beyond 100: The Next Century in Geodesy [PDF]

, 2023
This open access book contains 30 peer-reviewed papers based on presentations at the 27th General Assembly of the International Union of Geodesy and Geophysics (IUGG). The meeting was held from July 8 to 18, 2019 in Montreal, Canada, with the theme being

core   +3 more sources

Earthquake Analysis Suggests Dyke Intrusion in 2019 Near Tarawera Volcano, New Zealand

Frontiers in Earth Science, 2021
Tarawera volcano (New Zealand) is volumetrically dominated by rhyolitic lavas and pyroclastic deposits, but the most recent event in AD 1886 was a basaltic Plinian fissure eruption.
Thomas W. Benson, Finnigan Illsley-Kemp, Hannah C. Elms, Ian J. Hamling, Martha K. Savage, Colin J. N. Wilson, Eleanor R. H. Mestel, Simon J. Barker   +7 more
doaj   +1 more source

Volcanic Unrest at Taupō Volcano in 2019: Causes, Mechanisms and Implications

Geochemistry, Geophysics, Geosystems, 2021
Taupō volcano, New Zealand, is a large caldera volcano that has been highly active through the Holocene. It most recently erupted ∼1,800 years ago but there have been multiple periods of historic volcanic unrest.
Finnigan Illsley‐Kemp, Simon J. Barker, Colin J. N. Wilson, Calum J. Chamberlain, Sigrún Hreinsdóttir, Susan Ellis, Ian J. Hamling, Martha K. Savage, Eleanor R. H. Mestel, Fabian B. Wadsworth   +9 more
doaj   +1 more source

Inflation-Deflation Episodes in the Hengill and Hrómundartindur Volcanic Complexes, SW Iceland

Frontiers in Earth Science, 2021
Non-eruptive uplift and subsidence episodes remain a challenge for monitoring and hazard assessments in active volcanic systems worldwide. Sources of such deformation may relate to processes such as magma inflow and outflow, motion and phase changes of ...
Cécile Ducrocq, Halldór Geirsson, Thóra Árnadóttir, Daniel Juncu, Daniel Juncu, Vincent Drouin, Vincent Drouin, Gunnar Gunnarsson, Bjarni R. Kristjánsson, Freysteinn Sigmundsson, Sigrún Hreinsdóttir, Sigrún Tómasdóttir, Hanna Blanck   +12 more
doaj   +1 more source

Could Kı̄lauea's 2020 Post Caldera‐Forming Eruption Have Been Anticipated?

Geophysical Research Letters, 2022
In 2018 Kı̄lauea volcano erupted a decade's worth of basalt, given estimated magma supply rates, triggering caldera collapse. Yet, less than 2.5 years later Kı̄lauea re‐erupted. At the 2018 eruption onset, pressure within the summit reservoir was ∼20 MPa
Paul Segall, Kyle Anderson, Taiyi A. Wang   +2 more
doaj   +1 more source

Anatomy of a high-silica eruption as observed by a local seismic network: the June 2011 Puyehue–Cordón Caulle event (southern Andes, Chile) [PDF]

Solid Earth, 2023
High-silica explosive eruptions are one of the most dangerous natural phenomena, yet it is unclear which processes are involved in this infrequent kind of event.
D. Basualto, D. Basualto, A. Tassara, A. Tassara, A. Tassara, J. Lazo-Gil, L. Franco-Marin, C. Cardona, J. San Martín, F. Gil-Cruz, M. Calabi-Floddy, C. Farías   +11 more
doaj   +1 more source

Beyond elasticity: Are Coulomb properties of the Earth's crust important for volcano geodesy?

Journal of Volcanology and Geothermal Research, 2021
Abstract Geodetic modelling has become an established procedure to interpret the dynamics of active volcanic plumbing systems and magma transfer within the crust. Most established geodetic models implemented for inverting geodetic data share similar physical assumptions: (1) the Earth's crust is modelled as an infinite, homogeneous elastic half-space
Håvard Svanes Bertelsen, Frank Guldstrand, Freysteinn Sigmundsson, Rikke Pedersen, Karen Mair, Olivier Galland   +5 more
openaire   +2 more sources