Anatomy of thermal unrest at a hydrothermal system: Case study of the 2021-2022 crisis at Vulcano DOI Creative Commons
Sophie Pailot-Bonnétat,

Victoria Rafflin,

Andrew Harris

et al.

Research Square (Research Square), Journal Year: 2023, Volume and Issue: unknown

Published: May 19, 2023

Abstract Hydrothermal systems can generate phreatic and/or phreatomagmatic explosions with little warning. Understanding the temporal and spatial evolution of geophysical geochemical signals at hydrothermal is crucial for detecting precursors to unrest inform on hazard. Thermal signatures such are poorly defined because data records often too short or punctual compared activity timescales, which be decadal. La Fossa system Vulcano has been monitored since 1980s entered a period in 2021. We assessed thermal signature using ground- satellite-based scales ranging from minutes days. While continuously-recording stations provided continuous but point-based measurements, fumarole field vent surveys ASTER VIIRS images allowed lower resolution synoptic built. By integrating this multi-resolution set, precursory could retrospectively placed February June Intensity increased during summer 2021, an onset over few days September September, seismic, CO 2 , SO metrics also indicated unrest, leading Civil Protection raise alert level yellow October 1. Heat flux, having 4 MW May 2019, peaked 90 120 by March 2022. This ranked as one highest intensity like Reykjanes, well ahead Yellowstone Nysiros thus convolved our sets all other monitoring validate Unrest Index (VUI) that potentially applied any system. The VUI highlighted four stages none were clear single set: baseline, precursory, unrest. Onset was characterized sudden release fluids, likely caused failure sealed zones had become pressurized phase began possibly early ongoing more than 18 months, may continue several years. Our understanding behavior due hindsight, demonstrates how multiparametric track forecast

Language: Английский

Tephra fallout and dispersal modeling of phreatic eruptions: implications for volcanic hazard assessment in Martinique and Guadeloupe (Lesser Antilles) DOI
Audrey Michaud-Dubuy, Jean‐Christophe Komorowski, Guillaume Carazzo

et al.

Bulletin of Volcanology, Journal Year: 2025, Volume and Issue: 87(2)

Published: Feb. 1, 2025

Language: Английский

Citations

1
Transition from magmatic to phreatomagmatic eruptions in Young Ciremai volcano, Indonesia: insights from stratigraphy, componentry, and textural analysis of tephra deposits DOI Creative Commons
Wildan Nur Hamzah, Tsukasa Ohba, Muhammad Andriansyah Gurusinga

et al.

Earth Planets and Space, Journal Year: 2025, Volume and Issue: 77(1)

Published: Feb. 14, 2025

Language: Английский

Citations

1
Using Template Matching to Detect Hidden Fluid Release Episodes Beneath Crater Lakes in Ruapehu, Copahue, and Kawah Ijen Volcanoes DOI
Alberto Ardid, David Dempsey, Corentin Caudron

et al.

Journal of Geophysical Research Solid Earth, Journal Year: 2023, Volume and Issue: 128(10)

Published: Sept. 4, 2023

Abstract Volcano crater lakes, while picturesque, can sometimes mask the occurrence of small eruptions or hydrothermal fluid release events. However, these seemingly hidden events hold a wealth valuable information about underlying volcanic conduit and may pose risks to those near volcano’s summit. This study presents novel method for identifying hard‐to‐detect by examining seismic data from Ruapehu volcano in New Zealand. We undertake multi‐timescale template‐matching analysis that uses newly discovered eruption precursor, identify patterns related rapid consolidation seals, pressurization processes, subsequent fluids. As result, we identified potential instance sudden fluid‐release were previously unnoticed due presence lake. Our findings support conceptual model cyclic pressure variation within beneath an active involves formation disruption followed depressurization through Fluid discharge recession recorded as amplitude decay, provides properties reservoir, conduit, being discharged. also applied this technique Kawah‐Ijen (Indonesia) Copahue (Chile‐Argentina), multiple at volcanoes. These enhance our understanding conditions leading explosive eruptions, including could breach

Language: Английский

Citations

12
Tracking volcanic explosions using Shannon entropy at Volcán de Colima DOI Creative Commons
Pablo Rey‐Devesa, Janire Prudencio, Carmen Benı́tez

et al.

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: June 17, 2023

The main objective of this work is to show that Shannon Entropy (SE) calculated on continuous seismic signals can be used in a volcanic eruption monitoring system. We analysed three years activity Volcán de Colima, México, recorded between January 2015 and May 2017. This period includes two large explosions, with pyroclastic lava flows, intense less energetic explosion, culminating quiescence. In order confirm the success our results, we images Visual Monitoring system Colima Volcano Observatory. Another objectives how decrease SE values track minor explosive activity, helping Machine Learning algorithms more efficiently complex problem distinguishing explosion seismograms. big eruptions selected were forecasted successfully (6 2 days respectively) using decay SE. conclude could as complementary tool volcano monitoring, showing its successful behaviour prior eruptions, giving time enough alert population prepare for consequences an imminent well predicted moment eruption.

Language: Английский

Citations

11
Anatomy of thermal unrest at a hydrothermal system: case study of the 2021–2022 crisis at Vulcano DOI Creative Commons
Sophie Pailot-Bonnétat,

Victoria Rafflin,

Andrew Harris

et al.

Earth Planets and Space, Journal Year: 2023, Volume and Issue: 75(1)

Published: Oct. 11, 2023

Abstract Hydrothermal systems can generate phreatic and/or phreatomagmatic explosions with little warning. Understanding the temporal and spatial evolution of geophysical geochemical signals at hydrothermal is crucial for detecting precursory signs to unrest inform on hazard. Thermal signatures such are poorly defined because data records often too short or discrete compared activity timescales, which be decadal. La Fossa system Vulcano has been monitored since 1980s entered a period in 2021. We assessed thermal signature using ground- satellite-based various scales. While continuously-recording stations provided continuous but point-based measurements, fumarole field vent surveys infrared images obtained from satellite-flown sensors (ASTER VIIRS) allowed lower resolution synoptic built. By integrating this multi-resolution set, could retrospectively detected February June Intensity all metrics increased during summer 2021, an onset over few days September September, seismic, CO 2 , SO other also indicated unrest, leading Civil Protection raise alert level yellow October 1. Heat flux, having 4 MW May 2019, increasing 90 by peaking 120 March 2022. convolved our sets monitoring validate Unrest Index (VFUI), framework potentially applied any system. The VFUI highlighted four stages none were clear single set: background, precursory, unrest. Onset was characterized sudden release fluids, likely caused failure sealed zones that had become pressurized phase began possibly as early ongoing more than 18 months, may continue several years. Our understanding behavior due hindsight, demonstrates how multiparametric track forecast Graphical

Language: Английский

Citations

11
Ore and gangue mineral textures, fluid inclusions, mesoscopically structured quartz and pyrite, and their bearing on the genesis of hydrothermal breccias in the low-sulfidation Surnak gold deposit, SE Bulgaria DOI
Irina Marinova,

Aleksandar Gadzhalov,

Gülcan Bozkaya

et al.

Mineralium Deposita, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

Language: Английский

Citations

0
Applications and implications of monitoring surface hydrothermal deposits at Lastarria Volcano, Chile, using multispectral satellite data and cloud computing DOI Creative Commons
Grace Xingxin Gao, Thomas R. Walter, Daniel Müller

et al.

Geothermics, Journal Year: 2025, Volume and Issue: 127, P. 103255 - 103255

Published: Feb. 3, 2025

Language: Английский

Citations

0
Dynamics of the 1873 CE “Breccia De Fiore” phreatic eruption at Vulcano (Aeolian Islands, Italy) through historical chronicles, physical volcanology, and numerical modelling DOI Creative Commons

Silvia Giansante,

Tomaso Esposti Ongaro, Raffaello Cioni

et al.

Bulletin of Volcanology, Journal Year: 2025, Volume and Issue: 87(3)

Published: Feb. 6, 2025

Language: Английский

Citations

0
Characteristics of volcanic ash reveal changes in fragmentation and eruption dynamics at Poás Volcano, Costa Rica, 2016–2019 DOI Creative Commons
Monserrat Cascante, Thomas Giachetti, Heather Wright

et al.

Bulletin of Volcanology, Journal Year: 2025, Volume and Issue: 87(5)

Published: April 24, 2025

Language: Английский

Citations

0
Accurate hindcasting of explosive eruptions at Whakaari, New Zealand DOI Creative Commons
John Stix, Craig Miller, Yajing Liu

et al.

Volcanica, Journal Year: 2024, Volume and Issue: 7(1), P. 153 - 164

Published: March 12, 2024

Phreatic eruptions are small, sudden events, commonly with few precursory signals. They driven by interactions between magmatic and hydrothermal processes at shallow levels beneath the surface. Here we show that a sequence of banded tremor which occurred several weeks before 9 December 2019 eruption Whakaari (White Island), New Zealand, can be used to hindcast this eruption. The reveals progressively decreasing time interval bands. Extrapolating bands zero provides an accurate estimate, least one week prior eruption, within 10.2 hours when would occur, 2.8-day range 95 % confidence intervals. A similar set signals appeared 27 April 2016 these provide very 2.61 hours, 2.2-day Our analysis indicates potential forecasting approach may prove useful for successfully accurately future Whakaari. also applicable other volcanoes experience phreatic phreatomagmatic eruptions.

Language: Английский

Citations

3