Results 51 to 60 of about 355 (168)

Self‐Potential Signal Associated With Hydrothermal System Disrupted by Extreme Raining Events; The Case Study of Formica Leo, Piton de la Fournaise, La Réunion Island

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 11, November 2025.
Abstract The scoria cones called Formica Leo located at the base of the Piton de la Fournaise terminal cone have been chosen for its significant positive Self‐Potential (SP) anomalies associated with hydrothermal uprising fluids to monitor SP signal and study its dynamics in relation with huge and extreme rainfall events.
Emilie Roulleau, Anthony Finizola, Nicolas Vinet, Romain Biennais, Mazhar Meralli Ballou, Amélie Poullot, Céline D'Angelo, Clément Grace, Emma Chaudron Vrignaud, Rachel Gusset, Killian Mussard, Jehoji Kuzamba Ethu, Elisa‐Lou Reati   +12 more
wiley   +1 more source

Decadal Monitoring of Seismic Velocity Changes Beneath Izu‐Oshima, Central Japan, Using Ambient Seismic Noise Records

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 11, November 2025.
Abstract This study monitors the seismic velocity changes beneath the Izu‐Oshima volcano, central Japan, using ambient seismic noise records from 2003 to 2020. Applying seismic interferometry to the continuous waveform data from 24 seismic stations, we observed significant temporal variations in the seismic velocity structure.
Yohei Yukutake, Taka'aki Taira, Shin'ya Onizawa, Yuichi Morita   +3 more
wiley   +1 more source

Source and dynamics of a volcanic caldera unrest: Campi Flegrei, 1983–84

Scientific Reports, 2017
AbstractDespite their importance for eruption forecasting the causes of seismic rupture processes during caldera unrest are still poorly reconstructed from seismic images. Seismic source locations and waveform attenuation analyses of earthquakes in the Campi Flegrei area (Southern Italy) during the 1983–1984 unrest have revealed a 4–4.5 km deep NW-SE ...
Luca De Siena, Giovanni Chiodini, Giuseppe Vilardo, Edoardo Del Pezzo, Mario Castellano, Simona Colombelli, Nicola Tisato, Guido Ventura   +7 more
openaire   +6 more sources

Megabeds in the Marsili Basin, Tyrrhenian Sea

Basin Research, Volume 37, Issue 6, November/December 2025.
Widepsread and thick megabeds occur in the Marsili Basin of the Tyrrhenian Sea. Megabeds are linked to volcanic eruptions. The Marsili megabeds are recorded by thick turbidites to complex and heterogeneous deposits. ABSTRACT Megabeds, also known as ‘megaturbidites,’ are exceptionally large submarine sediment deposits likely formed by catastrophic ...
Faye Higgins, Derek E. Sawyer, Roger Urgeles   +2 more
wiley   +1 more source

Birth and growth of a volcanotectonic fault during the current volcanic unrest at Campi Flegrei caldera (Italy)

Communications Earth & Environment
The ongoing volcanic unrest at the highly populated Campi Flegrei caldera is accompanied by incremental seismic activity, ground uplift and geochemical anomalies that are raising severe public concern.
G. Giordano, G. Alfonsi, F. Salvini, F. Bianco, C. Chiarabba, M. Di Vito, A. Tramelli   +6 more
doaj   +1 more source

Preparatory Phase of Major Earthquakes During Campi Flegrei Unrest (2020–2024)

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 10, October 2025.
Abstract The ongoing unrest at Campi Flegrei is posing significant challenges for hazard assessment and risk mitigation. This densely populated region has experienced more than 20,000 shallow earthquakes since 2020, driven by hydrothermal fluid accumulation beneath a mechanically strong caprock.
A. G. Iaccarino, M. Picozzi, G. De Landro, D. Spallarossa   +3 more
wiley   +1 more source

A clearer view of the current phase of unrest at Campi Flegrei caldera

Science
We used a retrained machine learning workflow to enhance the performance of the seismic monitoring network at Campi Flegrei caldera (CFc) for improved tracking of the evolution of volcanic unrest. We analyzed the recent (21 January 2022 to 20 March 2025) continuous seismic data, which showed a sharp increase in seismicity at the highly populated CFc ...
Tan, Xing, Tramelli, Anna, Gammaldi, Sergio, Beroza, Gregory, Ellsworth, William, Marzocchi, Warner   +5 more
openaire   +3 more sources

The Maddaloni/X-6 eruption stands out as one of the major events during the Late Pleistocene at Campi Flegrei

Communications Earth & Environment
The Campi Flegrei caldera (Italy) is among the most productive volcanoes of the Mediterranean area. However, the volcanic history preceding the VEI 7 Campanian Ignimbrite eruption (~40 ka) is still poorly constrained.
Giada Fernandez, Antonio Costa, Biagio Giaccio, Jacopo Natale, Danilo M. Palladino, Gianluca Sottili   +5 more
doaj   +1 more source

Sassolite Precipitation at the Restless Campi Flegrei Volcano in Italy Points to Hydrothermal Flashing by Deep Boron‐Rich Brines

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 10, October 2025.
Abstract Studying the behavior of dormant volcanoes is a major challenge in volcanology. Here, we conducted a 10‐year survey of hydrothermal mineralization at Campi Flegrei, an active volcano near Naples in Italy, which last erupted in 1538. Our survey revealed a significant output of boric acid at the hydrothermal sulfate discharge area of Pisciarelli,
M. Piochi, A. Mormone, G. Solomita, R. Moretti   +3 more
wiley   +1 more source

Causal processes of shallow and deep seismicity at Campi Flegrei caldera

Communications Earth & Environment
The increase of ground deformation, seismicity, and gas emission is underlining a remarkable unrest at Campi Flegrei caldera. The direct involvement of magma has been invoked to explain the deformation and space/time changes of velocity anomalies at ...
Genny Giacomuzzi, Rossella Fonzetti, Aladino Govoni, Pasquale De Gori, Claudio Chiarabba   +4 more
doaj   +1 more source