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Aline Peltier

Institut de physique du globe de Paris

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Valérie Ferrazzini

Observatoire des Sciences de l'Univers de la Réunion

Andréa Di Muro

Observatoire des Sciences de l'Univers de la Réunion

Nicolas Villeneuve

Institut de physique du globe de Paris

Philippe Kowalski

Institut de physique du globe de Paris

Thomas Staudacher

Institut de physique du globe de Paris

Patrick Bachèlery

Laboratoire Magmas et Volcans

Patrice Boissier

Institut de physique du globe de Paris

Anthony Finizola

Observatoire des Sciences de l'Univers de la Réunion

François Beauducel

Institut de physique du globe de Paris

Lucia Gurioli

Université Clermont Auvergne

Cooperative Institutions

Centre National de la Recherche Scientifique

Institut de physique du globe de Paris

Université Paris Cité

Institut de Recherche pour le Développement

Sorbonne Paris Cité

Laboratoire Magmas et Volcans

Istituto Nazionale di Geofisica e Vulcanologia

Institut des Sciences de la Terre

Université Clermont Auvergne

Observatoire des Sciences de l'Univers de la Réunion

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Caldera resurgence: new insights from the study of the Siwi-Yenkahe-Yasur system (Vanuatu)

Élodie Brothelande J. Lenat Olivier Merle Aline Peltier

Caldera

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Cyclic magma storages and transfers at Piton de La Fournaise volcano (La Réunion hotspot) inferred from deformation and geochemical data

Earth and Planetary Science Letters (2008)

Aline Peltier Vincent Famin Patrick Bachèlery Valérie Cayol Y. Fukushima

Magma chamber

Hotspot (geology)

Extrusive

10.1016/j.epsl.2008.02.042

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Citations (104)

Imagery of internal structure and destabilization features of active volcano by 3D high resolution airborne electromagnetism

Scientific Reports (2019)

Marc Dumont Aline Peltier Else Roblin Pierre-Alexandre Reninger Stéphanie Barde‐Cabusson

Abstract Present-day volcano imaging and monitoring relies primarily on ground surface and satellite remote sensing observations. The overall understanding of the volcanic edifice and its dynamics is thus limited by surface investigation, spatial resolution and penetration depth of the ground methods, but also by human and material resources, and harsh environments. Here, we show for the first time that an airborne electromagnetic survey provides a 3D global resistivity model of an active volcano. The high-resolution survey acquired at the Piton de la Fournaise volcano on La Réunion Island, Indian Ocean, shows unprecedented details of the internal structure of the edifice, highlighting the upwelling hydrothermal system below the craters, magma intrusion pathways and inherited faults. Together with surface monitoring, such airborne imagery have a high potential to better characterize volcano internal structure and magmatic processes, and therefore to better anticipate catastrophic events such as phreato-magmatic eruptions or volcano destabilizations.

10.1038/s41598-019-54415-4

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The 2018-ongoing Mayotte submarine eruption: Magma migration imaged by petrological monitoring

Earth and Planetary Science Letters (2021)

Carole Berthod Étienne Médard Patrick Bachèlery Lucia Gurioli Andréa Di Muro

Submarine volcano

Dense-rock equivalent

Vulcanian eruption

Effusive eruption

Lateral eruption

10.1016/j.epsl.2021.117085

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Citations (55)

Thermal mapping: the hydrothermal system of a volcano used to map faults and palaeostructures within stratified ground. The Yasur-Yenkahe volcanic complex (Vanuatu)

EGU General Assembly Conference Abstracts (2014)

Guilhem Amin Douillet Aline Peltier Anthony Finizola Élodie Brothelande E. Garaébiti

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3D geophysical imagery of an active volcano by airborne eletromagnetism. (Piton de La Fournaise, La Reunion Island)

HAL (Le Centre pour la Communication Scientifique Directe) (2019)

Marc Dumont Else Roblin Pierre-Alexandre Reninger Aline Peltier Anthony Finizola

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Ground deformation patterns at White Island volcano (New Zealand) between 1967 and 2008 deduced from levelling data

Journal of Volcanology and Geothermal Research (2009)

Aline Peltier Bradley J. Scott Tony Hurst

Fumarole

Levelling

Crater lake

10.1016/j.jvolgeores.2009.01.020

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An Overview of Thermal Measurements (IR) at the Summit of Piton de la Fournaise Active Volcano and Inferences on the Structure and Dynamics of its Hydrothermal System

Fabrice J. Fontaine Aline Peltier Philippe Kowalski Andréa Di Muro Nicolas Villeneuve

Summit

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Mayotte seismic crisis: building knowledge in near real-time by combining land and ocean-bottom seismometers, first results

Geophysical Journal International (2021)

Jean‐Marie Saurel E. Jacques Chastity Aiken Anne Lemoine Lise Retailleau

SUMMARY The brutal onset of seismicity offshore Mayotte island North of the Mozambique Channel, Indian Ocean, that occurred in May 2018 caught the population, authorities and scientific community off guard. Around 20 potentially felt earthquakes were recorded in the first 5 d, up to magnitude Mw 5.9. The scientific community had little pre-existing knowledge of the seismic activity in the region due to poor seismic network coverage. During 2018 and 2019, the MAYOBS/REVOSIMA seismology group was progressively built between four French research institutions to improve instrumentation and data sets to monitor what we know now as an on-going exceptional submarine basaltic eruption. After the addition of 3 medium-band stations on Mayotte island and 1 on Grande Glorieuse island in early 2019, the data recovered from the Ocean Bottom Seismometers were regularly processed by the group to improve the location of the earthquakes detected daily by the land network. We first built a new local 1-D velocity model and established specific data processing procedures. The local 1.66 low VP/VS ratio we estimated is compatible with a volcanic island context. We manually picked about 125 000 P and S phases on land and sea bottom stations to locate more than 5000 events between February 2019 and May 2020. The earthquakes outline two separate seismic clusters offshore that we named Proximal and Distal. The Proximal cluster, located 10 km offshore Mayotte eastern coastlines, is 20–50 km deep and has a cylindrical shape. The Distal cluster start 5 km to the east of the Proximal cluster and extends below Mayotte's new volcanic edifice, from 50 to 25 km depth. The two clusters appear seismically separated, however our data set is insufficient to firmly demonstrate this.

Seismometer

10.1093/gji/ggab392

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Volcano Destabilizations: From Observations to an Integrated Model of Active Deformation

Aline Peltier Fabrice J. Fontaine Anthony Finizola Nicole Richter Nicolas Villeneuve

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