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Seismicity of Lipari, Aeolian Islands (Italy) From One-Month Recording of the LIPARI Array

Di Luccio, Francesca and Persaud, Patricia and Cucci, Luigi and Esposito, Alessandra and Carniel, Roberto and Cortés, Guillermo and Galluzzo, Danilo and Clayton, Robert W. and Ventura, Guido (2021) Seismicity of Lipari, Aeolian Islands (Italy) From One-Month Recording of the LIPARI Array. Frontiers in Earth Science, 9 . Art. No. 678581. ISSN 2296-6463. doi:10.3389/feart.2021.678581.

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Seismic activity in volcanic settings could be the signature of processes that include magma dynamics, hydrothermal activity and geodynamics. The main goal of this study is to analyze the seismicity of Lipari Island (Southern Tyrrhenian Sea) to characterize the dynamic processes such as the interaction between pre-existing structures and hydrothermal processes affecting the Aeolian Islands. We deployed a dense seismic array of 48 autonomous 3-component nodes. For the first time, Lipari and its hydrothermal field are investigated by a seismic array recording continuously for about a month in late 2018 with a 0.1–1.5 km station spacing. We investigate the distribution and evolution of the seismicity over the full time of the experiment using self-organized maps and automatic algorithms. We show that the sea wave motion strongly influences the background seismic noise. Using an automatic template matching approach, we detect and locate a seismic swarm offshore the western coast of Lipari. This swarm, made of transient-like signals also recognized by array and polarization analyses in the time and frequency domains, is possibly associated with the activation of a NE-SW fault. We also found the occurrence of hybrid events close to the onshore Lipari hydrothermal system. These events suggest the involvement of hot hydrothermal fluids moving along pre-existing fractures. Seismological analyses of one month of data detect signals related to the regional tectonics, hydrothermal system and sea dynamics in Lipari Island.

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Persaud, Patricia0000-0003-3462-7023
Clayton, Robert W.0000-0003-3323-3508
Additional Information:© 2021 Di Luccio, Persaud, Cucci, Esposito, Carniel, Cortés, Galluzzo, Clayton and Ventura. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. Received: 09 March 2021; Accepted: 30 June 2021; Published: 21 July 2021. We thank Comune di Lipari for hosting the experiment; INGV–OE of Catania and Lipari Observatory (L. Pruiti) for the logistical support. We are grateful to R. Vilardo and M. Martinelli of the Polo Museale di Lipari, Regione Sicilia, the Hotel Antea, CO.MARK and Tenuta Castellaro, Alessandro (grocery store) di Acquacalda, for hosting some nodes of the experiment. LSU students R. Ajala and E. McCullison assisted with the deployment setup and preparation of the nodes. FD would like to thank: F. Alves Pereira for his invaluable help in ObsPy (Beyreuther et al., 2010) scripting, M. Palano and L. Scognamiglio, for useful discussions about the tectonics of the southern Tyrrhenian region, and A. Ursino for the list of earthquakes of the Aeolian seismic bulletin for the period October 16th to November 15th, 2018. Seismological analyses have been partially done using ObsPy (Beyreuther et al., 2010). Some figures were done using GMT 6.0 (Wessel et al., 2019). We thank the Guest Associate Editor, JG, LD, an anonymous reviewer and the Chief Editor V. Acocella for useful comments. This research was supported and funded by the Istituto Nazionale di Geofisica e Vulcanologia, sezione di Roma 1 and partially supported by the Department of Geology and Geophysics of the Louisiana State University. AE was funded by Istituto Nazionale di Geofisica e Vulcanologia, sezione ONT. PP was supported as a 2020-21 fellow of the Radcliffe Institute for Advanced Study at Harvard University. The VSR software development has been funded from EU Horizon 2020 under the Marie Sklodowska-Curie Grant Agreement No. (74249) (VULCAN.ears). Data Availability Statement: The raw data supporting the conclusions of this article will be made available by the authors, without undue reservation. Author Contributions: FD and PP conceived the study. FD, LC, AE and GV deployed the Lipari array. RWC and PP downloaded the full dataset and generated the 1-h SAC files for the analysis. FD, LC and AE carried out the seismological analysis. RC computed the SOM and cluster analysis. GC computed the automatic evolution of seismic data. DG applied the array techniques to seismic data. FD wrote a preliminary draft of the manuscript, with contributions and suggestions from all authors. All authors contributed to the interpretation and discussion of the results and to the final version of the manuscript. The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
Group:Seismological Laboratory
Funding AgencyGrant Number
Istituto Nazionale di Geofisica e VulcanologiaUNSPECIFIED
Louisiana State UniversityUNSPECIFIED
Harvard UniversityUNSPECIFIED
Marie Curie Fellowship74249
Subject Keywords:seismic array, active volcanoes, hydrothermal system, volcano-tectonics, machine learning
Record Number:CaltechAUTHORS:20210929-193934993
Persistent URL:
Official Citation:Di Luccio F, Persaud P, Cucci L, Esposito A, Carniel R, Cortés G, Galluzzo D, Clayton RW and Ventura G (2021) The Seismicity of Lipari, Aeolian Islands (Italy) From One-Month Recording of the LIPARI Array. Front. Earth Sci. 9:678581. doi: 10.3389/feart.2021.678581
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:111098
Deposited By: Tony Diaz
Deposited On:04 Oct 2021 19:20
Last Modified:04 Oct 2021 20:28

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