A new comprehensive classification of the Piton de la Fournaise activity spanning the 1985–2010 period. Search and analysis of short-term precursors from a broad-band seismological station

Roult, G.; Peltier, Aline; Taisne, Benoît; Staudacher, Thomas; Ferrazzini, Valérie; Muro, Andréa Di

doi:10.1016/j.jvolgeores.2012.06.012

Cited by 124 publications

(210 citation statements)

References 58 publications

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“…During the 1998-2010 period of sustained activity, the Piton de la Fournaise volcano produced 2.6 eruptions per year, on average, spanning a large range of emitted volume of lava, between < 1 and 210 M m 3 Stau-dacher et al, 2009;Roult et al, 2012). Even if phreatic and phreatomagmatic eruptions have been described in the 18th and 19th centuries Michon et al, 2013), since the end of the 18th century the eruptive activity has mostly consisted of dominantly effusive or weakly explosive eruptions.…”

Section: Recent Historical Activity Of Piton De La Fournaisementioning

confidence: 99%

“…1972-1992, 1998-2010, mid-2014-today) alternate with relatively long periods of rest (e.g. 1966-1972, 1992-1998, 2011-mid-2014; Roult et al, 2012). From 2007 to 2010, the volcanic activity was relatively weak, with several short lived, small volume eruptions and intrusions mostly located close to the central cone (Peltier et al, 2010;Roult et al, 2012;.…”

Section: Recent Historical Activity Of Piton De La Fournaisementioning

confidence: 99%

“…1966-1972, 1992-1998, 2011-mid-2014; Roult et al, 2012). From 2007 to 2010, the volcanic activity was relatively weak, with several short lived, small volume eruptions and intrusions mostly located close to the central cone (Peltier et al, 2010;Roult et al, 2012;. It was followed by a relatively long phase of quiescence of 41 months (February 2011-June 2014) before a fast reawakening in June 2014 .…”

Section: Recent Historical Activity Of Piton De La Fournaisementioning

confidence: 99%

“…The 2015 STRAP experiment has been performed on the Piton de la Fournaise (PdF) volcano and has benefited of a strong cross-disciplinary collaboration between European scientists from 10 laboratories (France, Italy, Sweden, Cyprus). Piton de la Fournaise was selected as it is a well-known, very active volcano (four eruptions in 2015) and emits lava flows and gas plumes carrying negligible amounts of ash (Roult et al, 2012;Michon et al, 2013). Very few data exist on the composition and fluxes of high-temperature volcanic gases emitted by PdF eruptions (see Di Muro et al (2016a) for a recent review).…”

Section: Introductionmentioning

confidence: 99%

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First results of the Piton de la Fournaise STRAP 2015 experiment: multidisciplinary tracking of a volcanic gas and aerosol plume

et al. 2017

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Abstract. The STRAP (Synergie Transdisciplinaire pour Répondre aux Aléas liés aux Panaches volcaniques) campaign was conducted over the entire year of 2015 to investigate the volcanic plumes of Piton de La Fournaise (La Réu-nion, France). For the first time, measurements at the local (near the vent) and at the regional scales were conducted around the island. The STRAP 2015 campaign has become possible thanks to strong cross-disciplinary collaboration between volcanologists and meteorologists. The main observations during four eruptive periods (85 days) are summarised. They include the estimates of SO 2 , CO 2 and H 2 O emissions, the altitude of the plume at the vent and over different areas of La Réunion Island, the evolution of the SO 2 concentration, the aerosol size distribution and the aerosol extinction profile. A climatology of the volcanic plume dispersion is also reported. Simulations and measurements show that the plumes formed by weak eruptions have a stronger interaction with the surface of the island. Strong SO 2 mixing ratio and particle concentrations above 1000 ppb and 50 000 cm −3 respectively are frequently measured over a distance of 20 km from Piton de la Fournaise. The measured aerosol size distribution shows the predominance of small particles in the volcanic plume. Several cases of strong nucleation of sulfuric acid have been observed within the plume and at the distal site of the Maïdo observatory. The STRAP 2015 campaign provides a unique set of multi-disciplinary data that can now be used by modellers to improve the numerical parameterisations of the physical and chemical evolution of the volcanic plumes.

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Section: Recent Historical Activity Of Piton De La Fournaisementioning

confidence: 99%

Section: Recent Historical Activity Of Piton De La Fournaisementioning

confidence: 99%

Section: Recent Historical Activity Of Piton De La Fournaisementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

First results of the Piton de la Fournaise STRAP 2015 experiment: multidisciplinary tracking of a volcanic gas and aerosol plume

et al. 2017

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“…When magma accumulates at shallow depth or propagates toward the surface, it induces seismicity as well as surface displacements, such that geophysical signals recorded at volcanoes have long been used to infer magma path and magma plumbing system characteristics (e.g., Swanson et al, 1983;Voight et al, 1998;Aoki et al, 1999;Roult et al, 2012;Sigmundsson et al, 2015). Recently the ability of geodesy to provide continuous and spatially extensive evolution of surface displacements during inter-eruptive periods has been drastically improved as a consequence of the increasing number of continuous Global Navigation Satellite System (GNSS) networks installed on volcanoes (e.g., Geirsson et al, 2012;Peltier et al, 2016) together with the improvement of the availability of Synthetic Aperture Radar (SAR) data (i.e., better spatial coverage, improved spatial and temporal resolution of SAR data from new satellite missions) (e.g., Pinel et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Assimilation of Deformation Data for Eruption Forecasting: Potentiality Assessment Based on Synthetic Cases

2017

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In monitoring active volcanoes, the magma overpressure is one of the key parameters used in forecasting volcanic eruptions. This parameter can be inferred from the ground displacements measured on the Earth's surface by applying inversion techniques. However, in most studies, the huge amount of information about the behavior of the volcano contained in the temporal evolution of the deformation signal is not fully exploited by inversion. Our work focuses on developing a strategy in order to better forecast the magma overpressure using data assimilation. We take advantage of the increasing amount of geodetic data [i.e., Interferometric Synthetic Aperture Radar (InSAR) and Global Navigation Satellite System (GNSS)] recorded on volcanoes nowadays together with the wide-range availability of dynamical models that can provide better understanding about the volcano plumbing system. Here, we particularly built our strategy on the basis of the Ensemble Kalman Filter (EnKF). We forecast the temporal behaviors of the magma overpressures and surface deformations by adopting a simple and generic two-magma chamber model and by using synthetic GNSS and/or InSAR data. We prove the ability of EnKF to both estimate the magma pressure evolution and constrain the characteristics of the deep volcanic system (i.e., reservoir size as well as basal magma inflow). High temporal frequency of observation is required to ensure the success of EnKF and the quality of assimilation is also improved by increasing the spatial density of observations in the near-field. We thus show that better results are obtained by combining a few GNSS temporal series of high temporal resolution with InSAR images characterized by a good spatial coverage. We also show that EnKF provides similar results to sophisticated Bayesian-based inversion while using the same dynamical model with the advantage of EnKF to potentially account for the temporal evolution of the uncertain model parameters. Our results show that EnKF works well with the synthetic cases and there is a great potential in using the method for real-time monitoring of volcanic unrest.

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Imaging preeruptive and coeruptive structural and mechanical changes of a volcano with ambient seismic noise

et al. 2013

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[1] Forecasting the location of an eruption is of primary importance for risk management in volcanic regions. Locating the underground structural changes associated with a potential eruption is also a key issue to better understand the dynamics at work in a volcano. Using recent results in wave physics, we develop an imaging procedure that is based on the sensitivity of multiply scattered waves to weak changes in heterogeneous media. This procedure allows to locate changes in both mechanical and scattering properties of the studied medium. We study ambient seismic noise from 19 broadband stations at the active volcano Piton de la Fournaise on Reunion Island, recorded from June to December 2010. During this period, two volcanic eruptions occurred at two different locations. We calculate the noise cross correlations and study two types of changes in the coda: apparent velocity variations related to changes in the elastic properties of the medium; and, waveform decoherence associated with variations in the scattering, and thus the geological structures. We observe that the temporal variations of both of these parameters provide potential precursors of volcanic eruptions at Piton de la Fournaise. The locations determined from the preeruptive and coeruptive changes in both parameters are in good agreement with the actual eruptive activities. These data demonstrate that the coda of ambient noise correlations contains deterministic information on the locations of the eruptive processes in an active volcano. Our analysis offers an original and significant constraint for the localization of forthcoming volcanic eruptions.Citation: Obermann, A., T. Planès, E. Larose, and M. Campillo (2013), Imaging preeruptive and coeruptive structural and mechanical changes of a volcano with ambient seismic noise,

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A new comprehensive classification of the Piton de la Fournaise activity spanning the 1985–2010 period. Search and analysis of short-term precursors from a broad-band seismological station

Cited by 124 publications

References 58 publications

First results of the Piton de la Fournaise STRAP 2015 experiment: multidisciplinary tracking of a volcanic gas and aerosol plume

First results of the Piton de la Fournaise STRAP 2015 experiment: multidisciplinary tracking of a volcanic gas and aerosol plume

Assimilation of Deformation Data for Eruption Forecasting: Potentiality Assessment Based on Synthetic Cases

Imaging preeruptive and coeruptive structural and mechanical changes of a volcano with ambient seismic noise

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