Results 61 to 70 of about 128,618 (192)

Mid‐Ocean Ridge (MOR) Ash Dispersal on Axial Seamount, Juan de Fuca Ridge

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 9, September 2025.
Abstract Rare eruption of primitive normal mid‐ocean ridge basalt (N‐MORB) magma (∼9.5 wt% MgO) on the summit of Axial Seamount generated abundant ash that was dispersed for several km. The unique geochemical signature of this ash deposit is distinct from otherwise typical MORB with more evolved compositions. As such, it is a key marker bed that can be
Ryan A. Portner, Guangyu Xu, Arran P. Murch, David A. Clague, Brian M. Dreyer, Jennifer B. Paduan   +5 more
wiley   +1 more source

Lava Lake Spattering Drives Seismic Tremor During the Geldingadalir 2021 Eruption, Iceland

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 8, August 2025.
Abstract Volcanic eruptions generate a continuous ground motion that is commonly referred to as tremor. Although tremor is used worldwide for real‐time monitoring of volcanoes, the mechanisms involved are generally poorly understood. Here, we study the episodic effusion during 2021 Geldingadalir eruption. We use photogrammetric data and videos acquired
Alea Joachim, Eva P. S. Eibl, Daniel Müller, Thomas R. Walter, Tom Winder, Nicholas Rawlinson   +5 more
wiley   +1 more source

On the Complex Topography of Marine Volcanoes and Its Control on the Spatial and Magnitude Distribution of Surface Displacement

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 8, August 2025.
Abstract Marine volcanoes exhibit significant topographic relief, as they extend from deep below sea level to thousands of meters above. These volcanoes often have complex, asymmetric topographies due to the submersion of their flanks, yet deformation models often approximate this topographic surface as flat and overlook its effect in modeling ...
Megan Campbell, Séverine Furst, Henriette Sudhaus, Morelia Urlaub   +3 more
wiley   +1 more source

Coupled Paleomagnetism and 40Ar/39Ar Dating of Latera Ignimbrites (Vulsini Volcanic District, Italy) Unravel Processes Associated to Piston‐Collapse Calderas

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 8, August 2025.
Abstract Correlation of ignimbrite units at polygenic calderas is mandatory for the reconstruction of caldera‐forming events and proper identification of their eruption dynamics. However, ignimbrites erupted at different times from the same caldera can display similarities in composition and lithology that can hamper proper correlation of outcrops ...
Arianna Beatrice Malaguti, Stéphane Scaillet, Marco Pistolesi, Mauro Rosi, Fabio Speranza, Alberto Renzulli   +5 more
wiley   +1 more source

Inferring Eruption Dynamics From Seismometer Tilt: A Case Study of Erebus and Augustine Volcanoes

Journal of Geophysical Research: Solid Earth
Broadband seismometers are sensitive to tilt as a consequence of their design. We used broadband data from Erebus volcano on Ross Island, Antarctica, and Augustine volcano in Lower Cook Inlet, Alaska, to make tilt measurements associated with individual ...
M. Christoffersen, R. Grapenthin, M. Angarita, R. Aster, J. Chaput, P. R. Kyle, AL Christoffersen   +6 more
semanticscholar   +1 more source

Systematic Slowing of Initially Rapid Retreat of New Coasts Formed by Historical Eruptions in Volcanic Islands

Journal of Geophysical Research: Earth Surface, Volume 130, Issue 8, August 2025.
Abstract Due to their exposure to waves, volcanic island coasts typically retreat with cliff collapses and other erosional processes. Understanding how retreat rates vary over time and in response to environmental and other factors could be useful for geohazard assessment, coastal management and landform reconstruction.
Zhongwei Zhao, Neil C. Mitchell, Rui Quartau, Ricardo S. Ramalho   +3 more
wiley   +1 more source

Relation Between Volcanic Tremor and Geodetic Strain Signals During Basaltic Explosive Eruptions at Etna

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 8, August 2025.
Abstract Volcano deformation and seismicity during basaltic explosive eruptions are the expressions of the processes that regulate magma ascent from depth to surface. Both deflation rate and seismic tremor are hypothesized to scale with magma ascent rate, which plays a significant role in the resulting eruptive style.
L. Carleo, G. Currenti, A. Bonaccorso, A. Sicali   +3 more
wiley   +1 more source

Active Faults, Kinematics, and Seismotectonic Evolution during Tajogaite Eruption 2021 (La Palma, Canary Islands, Spain)

Applied Sciences
During the 2021 La Palma strombolian and fissure eruption, two faults were identified that controlled the spatial distribution of earthquake hypocenters and effusive eruptive vents.
M. Rodríguez-Pascua, R. Pérez-López, M. A. Perucha, Nieves Sánchez, J. López-Gutierrez, J. Mediato, D. Sanz-Mangas, Gonzalo Lozano, Inés Galindo, J. García-Davalillo, Carlos Lorenzo Carnicero, Marta Béjar   +11 more
semanticscholar   +1 more source

La Palma 2021 Eruption (Canary Islands): Measurements and Modelling of Lava Flow Cooling Rates and Applications for Infrastructure Reconstruction and Risk Mitigation

GeoHazards
On 19 September 2021, a strombolian volcanic eruption began on the island of La Palma in the Canary Islands. This event resulted in the destruction of 73 km of roads, urban infrastructure, numerous houses, and agricultural crops, affecting approximately ...
Luis I. González-de-Vallejo, Aaron Álvarez-Hernández, Mercedes Ferrer, John P. Lockwood, N. Pérez, P. Hernández, Ana Miranda-Hardisson, J. A. Rodríguez-Losada, David Afonso-Falcón, Héctor de-los-Ríos, Javier Páez-Padilla, L. Hernández-Gutiérrez   +11 more
semanticscholar   +1 more source

Puu Mahana Near South Point in Hawaii Is a Primary Surtseyan Ash Ring, Not a Sandhills-type Littoral Cone [PDF]

, 1992
Puu Mahana has previously been interpreted to be a littoral cone, formed at a secondary rootless vent where lava flowed from land into the ocean, but a number of lines of evidence point to it being a remnant of a Surtseyan tuff ring built on a primary
Walker, George P.L.
core