DInSAR Analysis and Analytical Modeling of Mount Etna Displacements: The December 2018 Volcano‐Tectonic Crisis

Novellis, Vincenzo De; Atzori, Simone; Luca, Claudio De; Manzo, M.; Valerio, Emanuela; Bonano, Manuela; Cardaci, C.; Castaldo, Raffaele; Bucci, Daniela Di; Manunta, Michele; Onorato, G.; Pepe, Antonio; Solaro, Giuseppe; Tizzani, Pietro; Zinno, Ivana; Neri, Marco; Lanari, R.; Casu, Francesco

doi:10.1029/2019gl082467

Cited by 75 publications

(68 citation statements)

References 52 publications

(67 reference statements)

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“…Third, the relatively short time-span (<3 weeks) for offset data collection, reduces the contribution of significant post-seismic slip. Fourth, by comparing coseismic slip at shallow depth 12 and at the surface, we found a good agreement, and the amount of afterslip is likely as small as our measurement uncertainty (±1 cm).…”

Section: Background and Summarysupporting

confidence: 53%

Surface ruptures database related to the 26 December 2018, MW 4.9 Mt. Etna earthquake, southern Italy

et al. 2020

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We provide a database of the surface ruptures produced by the 26 December 2018 Mw 4.9 earthquake that struck the eastern flank of Mt. Etna volcano in Sicily (southern Italy). Despite its relatively small magnitude, this shallow earthquake caused about 8 km of surface faulting, along the trace of the NNWtrending active Fiandaca Fault. Detailed field surveys have been performed in the epicentral area to map the ruptures and to characterize their kinematics. The surface ruptures show a dominant right-oblique sense of displacement with an average slip of about 0.09 m and a maximum value of 0.35 m. We have parsed and organized all observations in a concise database, with 932 homogeneous georeferenced records. The Fiandaca Fault is part of the complex active Timpe faults system affecting the eastern flank of Etna, and its seismic history indicates a prominent surface-faulting potential. Therefore, this database is essential for unravelling the seismotectonics of shallow earthquakes in volcanic areas, and contributes updating empirical scaling regressions that relate magnitude and extent of surface faulting.

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Section: Background and Summarysupporting

confidence: 53%

Surface ruptures database related to the 26 December 2018, MW 4.9 Mt. Etna earthquake, southern Italy

et al. 2020

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“…The following portion of the eruption did not occur because the stress accumulated in that sector triggered the vigorous movement of the SE flank of Etna (several tens of cm), also generating a 4.9 MW earthquake that seriously damaged numerous inhabited centers [17]. It is therefore possible that these deformations have drained the magmatic dike laterally in depth, preventing it from erupting on the surface [16].…”

Section: Discussionmentioning

confidence: 99%

“…Meanwhile, weak Strombolian activity was taking place at the summit of NSEC (Figures 1 and 2). At~7:00 UT on 24 December, Etna showed sudden signals Several research articles have been focused on the interpretation of the events and especially of the process of dike intrusion and the quantification of the intruded volumes in space and time [13,14,16,17]. In this paper, we describe the chronology of eruptive events on the basis of remote sensing observations carried out from the INGV-OE network of monitoring cameras and from satellites.…”

Section: Introductionmentioning

confidence: 99%

The VEI 2 Christmas 2018 Etna Eruption: A Small But Intense Eruptive Event or the Starting Phase of a Larger One?

et al. 2020

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The Etna flank eruption that started on 24 December 2018 lasted a few days and involved the opening of an eruptive fissure, accompanied by a seismic swarm and shallow earthquakes, significant SO2 flux release, and by large and widespread ground deformation, especially on the eastern flank of the volcano. Lava fountains and ash plumes from the uppermost eruptive fissure accompanied the opening stage, causing disruption to Catania International Airport, and were followed by a quiet lava effusion within the barren Valle del Bove depression until 27 December. This was the first flank eruption to occur at Etna in the last decade, during which eruptive activity was confined to the summit craters and resulted in lava fountains and lava flow output from the crater rims. In this paper, we used ground and satellite remote sensing techniques to describe the sequence of events, quantify the erupted volumes of lava, gas, and tephra, and assess volcanic hazards.

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“…From 13:30 ash emission from the summit craters decreased, while the Strombolian activity from the fissures was still active and persisted with violent and discontinuous emissions losing intensity during the night. A high level of seismicity persisted during the whole eruptive event with earthquakes up to magnitude 4 M located in the Etna region [58,59].…”

Section: Mt Etna Case Study: the 24 December 2018 Flank Eruptionmentioning

confidence: 99%

Ensemble-Based Data Assimilation of Volcanic Ash Clouds from Satellite Observations: Application to the 24 December 2018 Mt. Etna Explosive Eruption

et al. 2020

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Accurate tracking and forecasting of ash dispersal in the atmosphere and quantification of its uncertainty are of fundamental importance for volcanic risk mitigation. Numerical models and satellite sensors offer two complementary ways to monitor ash clouds in real time, but limits and uncertainties affect both techniques. Numerical forecasts of volcanic clouds can be improved by assimilating satellite observations of atmospheric ash mass load. In this paper, we present a data assimilation procedure aimed at improving the monitoring and forecasting of volcanic ash clouds produced by explosive eruptions. In particular, we applied the Local Ensemble Transform Kalman Filter (LETKF) to the results of the Volcanic Ash Transport and Dispersion model HYSPLIT. To properly simulate the release and atmospheric transport of volcanic ash particles, HYSPLIT has been initialized with the results of the eruptive column model PLUME-MoM. The assimilation procedure has been tested against SEVIRI measurements of the volcanic cloud produced during the explosive eruption occurred at Mt. Etna on 24 December 2018. The results show how the assimilation procedure significantly improves the representation of the current ash dispersal and its forecast. In addition, the numerical tests show that the use of the sequential Ensemble Kalman Filter does not require a precise initialization of the numerical model, being able to improve the forecasts as the assimilation cycles are performed.

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DInSAR Analysis and Analytical Modeling of Mount Etna Displacements: The December 2018 Volcano‐Tectonic Crisis

Cited by 75 publications

References 52 publications

Surface ruptures database related to the 26 December 2018, MW 4.9 Mt. Etna earthquake, southern Italy

Surface ruptures database related to the 26 December 2018, MW 4.9 Mt. Etna earthquake, southern Italy

The VEI 2 Christmas 2018 Etna Eruption: A Small But Intense Eruptive Event or the Starting Phase of a Larger One?

Ensemble-Based Data Assimilation of Volcanic Ash Clouds from Satellite Observations: Application to the 24 December 2018 Mt. Etna Explosive Eruption

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