Copahue volcano; Data reduction methods; Non-eruptive tremor; Tremor characterization; Geology; Space and Planetary Science
Abstract :
[en] Understanding seismic tremor wavefields can shed light on the complex functioning of a volcanic system and, thus, improve volcano monitoring systems. Usually, several seismic stations are required to detect, characterize, and locate volcanic tremors, which can be difficult in remote areas or low-income countries. In these cases, alternative techniques have to be used. Here, we apply a data-reduction approach based on the analysis of three-component seismic data from two co-located stations operating in different times to detect and analyze long-duration tremors. We characterize the spectral content and the polarization of 355 long-duration tremors recorded by a seismic sensor located 9.5 km SE from the active vent of Copahue volcano in the period 2012–2016 and 2018–2019. We classified them as narrow- (NB) and broad-band (BB) tremors according to their spectral content. Several parameters describe the characteristic peaks composing each NB episode: polarization degree, rectilinearity, horizontal azimuth, vertical incidence. Moreover, we propose two coefficients CP and CL for describing to what extent the wavefield is polarized. For BB episodes, we extend these attributes and express them as a function of frequency. We compare the occurrence of NB and BB episodes with the volcanic activity (including the level of the crater lake, deformation, temperature, and explosive activity) to get insights into their mechanisms. This comparison suggests that the wavefield of NB tremors becomes more linearly polarized during eruptive episodes, but does not provide any specific relationship between the tremor frequency and volcanic activity. On the other hand, BB tremors show a seasonal behavior that would be related to the activity of the shallow hydrothermal system. Graphical Abstract: [Figure not available: see fulltext.]
Disciplines :
Earth sciences & physical geography
Author, co-author :
Melchor, Ivan ; Instituto de Investigación en Paleobiología y Geología, Universidad Nacional de Río Negro–CONICET, General Roca, Argentina
Almendros, Javier; Instituto Andaluz de Geofísica, Universidad de Granada, Granada, Spain
Hantusch, Marcia; Instituto de Investigación en Paleobiología y Geología, Universidad Nacional de Río Negro–CONICET, General Roca, Argentina
Samsonov, Sergey; Canada Centre for Mapping and Earth Observations, Natural Resources Canada, Ottawa, Canada
De Rauw, Dominique ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR) ; Instituto de Investigación en Paleobiología y Geología, Universidad Nacional de Río Negro–CONICET, General Roca, Argentina ; European Centre of Geodynamics and Seismology, Walferdange, Luxembourg
Martínez, Enzo; Instituto de Investigación en Paleobiología y Geología, Universidad Nacional de Río Negro–CONICET, General Roca, Argentina
Caselli, Alberto; Instituto de Investigación en Paleobiología y Geología, Universidad Nacional de Río Negro–CONICET, General Roca, Argentina
Language :
English
Title :
Long-duration seismicity and their relation to Copahue volcano unrest
Publication date :
December 2022
Journal title :
Earth, Planets, and Space
ISSN :
1343-8832
eISSN :
1880-5981
Publisher :
Springer Science and Business Media Deutschland GmbH
We express our gratitude to the Instituto Nacional de Prevenci?n S?smica (INPRES) of Argentina and the Autoridad Interjurisdiccional de Cuencas (AIC) of Argentina for sharing their data. We also thank the Canadian Space Agency for providing RADARSAT-2 data. We are grateful to Alicia Hotovec-Ellis, Arthur Jolly, and two anonymous reviewers for providing useful comments. In addition, special mention to Maurizio Rippepe, the Caviahue Municipality, Higinio del Monte, and Silvio Morales that collaborated in field works and helped with logistical support.This research was partially supported by projects BRAVOSEIS (CTM2016.77315) of the Spanish Ministry of Science and PI40-A-548 of the National University of Rio Negro.
Agusto MR, Caselli A, Daga R, Varekamp J, Trinelli A, Dos Santos Afonso M, Velez ML, Euillades P, Ribeiro Guevara S (2017) The crater lake of Copahue volcano (Argentina): geochemical and thermal changes between 1995 and 2015. Geol Soc London Spec Publ 437(1):107–130. 10.1144/SP437.16 DOI: 10.1144/SP437.16
Almendros J, Ibáñez JM, Alguacil G, Del Pezzo E, Ortiz R (1997) Array tracking of the volcanic tremor source at Deception Island. Antarctica. Geophys Res Lett 24(23):3069–3072. 10.1029/97GL03096 DOI: 10.1029/97GL03096
Almendros J, Carmona E, Ibáñez J (2004) Precise determination of the relative wave propagation parameters of similar events using a small-aperture seismic array. J Geophys Res Solid Earth 109(B11):1–15. 10.1029/2003JB002930 DOI: 10.1029/2003JB002930
Almendros J, Abella R, Mora M, Lesage P (2012) Time-dependent spatial amplitude patterns of harmonic tremor at arenal Volcano, Costa Rica: seismic-wave interferences? Bull Seismol Soc Am 102(6):2378–2391. 10.1785/0120120066 DOI: 10.1785/0120120066
Almendros J, Abella R, Mora MM, Lesage P (2014) Array analysis of the seismic wavefield of long-period events and volcanic tremor at Arenal volcano, Costa Rica. J Geophysl Res Solid Earth 119(7):5536–5559. 10.1002/2013JB010628 DOI: 10.1002/2013JB010628
Anderson S, Nehorai A (1996) Analysis of a polarized seismic wave model. IEEE Trans Signal Process 44(2):379–386. 10.1109/78.485933 DOI: 10.1109/78.485933
Ayele A, Jacques E, Kassim M, Kidane T, Omar A, Tait S, Nercessian A, de Chabalier J-B, King G (2007) The volcano-seismic crisis in Afar, Ethiopia, starting September 2005. Earth Planet Sci Lett 255(1):177–187. 10.1016/j.epsl.2006.12.014 DOI: 10.1016/j.epsl.2006.12.014
Bandt C, Pompe B (2002) Permutation entropy: a natural complexity measure for time series. Phys Rev Lett 88(17):174102. 10.1103/PhysRevLett.88.174102 DOI: 10.1103/PhysRevLett.88.174102
Barcelona H, Yagupsky D, Vigide N, Senger M (2019) Structural model and slip-dilation tendency analysis at the Copahue geothermal system: inferences on the reservoir geometry. J Volcanol Geoth Res 375:18–31. 10.1016/j.jvolgeores.2019.03.007 DOI: 10.1016/j.jvolgeores.2019.03.007
Barrière J, D’Oreye N, Oth A, Theys N, Mashagiro N, Subira J, Kervyn F, Smets B (2019) Seismicity and outgassing dynamics of Nyiragongo volcano. Earth Planet Sci Lett 528:115821. 10.1016/j.epsl.2019.115821 DOI: 10.1016/j.epsl.2019.115821
Benoit JP, McNutt SR, Barboza V (2003) Duration-amplitude distribution of volcanic tremor. J Geophys Res Solid Earth 108(B3):1–15. 10.1029/2001JB001520 DOI: 10.1029/2001JB001520
Candela-Becerra LJ, Toyos G, Suárez-Herrera CA, Castro-Godoy S, Agusto M (2020) Thermal evolution of the Crater Lake of Copahue Volcano with ASTER during the last quiescence period between 2000 and 2012 eruptions. J Volcanol Geoth Res 392:106752. 10.1016/j.jvolgeores.2019.106752 DOI: 10.1016/j.jvolgeores.2019.106752
Cannata A, Di Grazia G, Montalto P, Ferrari F, Nunnari G, Patanè D, Privitera E (2010) New insights into banded tremor from the 2008–2009 Mount Etna eruption. J Geophys Res Solid Earth 115(12):1–22. 10.1029/2009JB007120 DOI: 10.1029/2009JB007120
Carniel R (2014) Characterization of volcanic regimes and identification of significant transitions using geophysical data: a review. Bull Volcanol 76(8):1–22. 10.1007/s00445-014-0848-0 DOI: 10.1007/s00445-014-0848-0
Caselli A, Agusto M, Velez ML, Forte P, Bengoa C, Daga R, Albite J, Capaccioni B (2016) The 2012 eruption. In Tassi F, Vaselli O, Caselli AT (eds.) Copahue Volcano, active volcanoes of the world chapter 4. Springer, Berlin Heidelberg, pp 61–77. https://doi.org/10.1007/978-3-662-48005-2.
Caudron C, Girona T, Jolly A, Christenson B, Savage MK, Carniel R, Lecocq T, Kennedy B, Lokmer I, Yates A, Hamling I, Park I, Kilgour G, Mazot A (2021) A quest for unrest in multiparameter observations at Whakaari/White Island volcano, New Zealand 2007–2018. Earth Planets Space 73(1):195. 10.1186/s40623-021-01506-0 DOI: 10.1186/s40623-021-01506-0
Chouet B (1986) Dynamics of a fluid-driven crack in three dimensions by the finite difference method. J Geophys Res 91(B14):13967. 10.1029/jb091ib14p13967 DOI: 10.1029/jb091ib14p13967
Chouet B, Matoza R (2013) A multi-decadal view of seismic methods for detecting precursors of magma movement and eruption. J Volcanol Geoth Res 252:108–175. 10.1016/j.jvolgeores.2012.11.013 DOI: 10.1016/j.jvolgeores.2012.11.013
de Franco R, Musacchio G (2013) Polarization filter with singular value decomposition. Geophysics 78(3):932–938. 10.1190/1.1444983 DOI: 10.1190/1.1444983
Díaz J, Ruíz M, Crescentini L, Amoruso A, Gallart J (2014) Seismic monitoring of an alpine mountain river. J Geophys Res Solid Earth 119(4):3276–3289 DOI: 10.1002/2014JB010955
Droznin DV, Shapiro NM, Droznina SY, Senyukov SL, Chebrov VN, Gordeev EI (2015) Detecting and locating volcanic tremors on the Klyuchevskoy group of volcanoes (Kamchatka) based on correlations of continuous seismic records. Geophys J Int. 10.1093/gji/ggv342 DOI: 10.1093/gji/ggv342
Ferrazzini V, Aki K, Chouet B (1991) Characteristics of seismic waves composing Hawaiian volcanic tremor and gas-piston events observed by a near-source array. J Geophys Res Solid Earth 96(B4):6199–6209. 10.1029/90JB02781 DOI: 10.1029/90JB02781
Ferrick MG, Qamar A, St. Lawrence W F (1982) Source mechanism of volcanic tremor. J Geophys Res 87(B10):8675–8683 DOI: 10.1029/JB087iB10p08675
Folguera A, Rojas Vera E, Vélez L, Tobal J, Orts D, Agusto M, Caselli A, Ramos VA (2016) A review of the geology, structural controls, and tectonic setting of Copahue Volcano, Southern Volcanic Zone, Andes, Argentina. In: Tassi F, Vaselli O, Caselli AT (eds) Copahue Volcano, Active Volcanoes of the World chapter 1. Springer-Verlag, Berlin Heidelberg, pp 3–22. https://doi.org/10.1007/978-3-662-48005-1.
Fujita E (2008) Banded tremor at Miyakejima volcano, Japan: implication for two-phase flow instability. J Geophys Res Solid Earth 113(4):1–18
Gestrich JE, Fee D, Tsai VC, Haney MM, Van Eaton AR (2020) A physical model for volcanic eruption tremor. J Geophys Res Solid Earth. 10.1029/2019JB018980 DOI: 10.1029/2019JB018980
Girona T, Caudron C, Huber C (2019) Origin of shallow volcanic tremor: the dynamics of gas pockets trapped beneath thin permeable media. J Geophys Res Solid Earth 124(5):4831–4861 DOI: 10.1029/2019JB017482
Goitom B, Oppenheimer C, Hammond JOS, Grandin R, Barnie T, Donovan A, Ogubazghi G, Yohannes E, Kibrom G, Kendall J-M, Carn SA, Fee D, Sealing C, Keir D, Ayele A, Blundy J, Hamlyn J, Wright T, Berhe S (2015) First recorded eruption of Nabro volcano, Eritrea, 2011. Bull Volcanol. 10.1007/s00445-015-0966-3 DOI: 10.1007/s00445-015-0966-3
Goldstein P, Chouet B (1994) Array measurements and modeling of sources of shallow volcanic tremor at Kilauea Volcano, Hawaii. J Geophys Res Solid Earth 99(B2):2637–2652. 10.1029/93JB02639 DOI: 10.1029/93JB02639
Gottschämmer E (1999) Volcanic tremor associated with eruptive activity at Bromo volcano. Ann Geofis 42(3):465–481. 10.4401/ag-3731 DOI: 10.4401/ag-3731
Greenhalgh SA, Zhou B, Rutty M (2008) Effect of coherent noise on single-station direction of arrival estimation. J Seismolog 12(3):377–385. 10.1007/s10950-007-9085-8 DOI: 10.1007/s10950-007-9085-8
Greenhalgh S, Sollberger D, Schmelzbach C, Rutty M (2018) Single-station polarization analysis applied to seismic wavefields: a tutorial. Adv Geophys 59:123–170. 10.1016/bs.agph.2018.09.002 DOI: 10.1016/bs.agph.2018.09.002
Gresta S, Privitera E, Leotta A, Gasperini P (1996) Analysis of the intermittent volcanic tremor observed at Mt. Etna, Sicily during March-May 1987. Ann Geofis 39(2):421–428. 10.4401/ag-3979 DOI: 10.4401/ag-3979
Hantusch M, Lacanna G, Ripepe M, Montenegro V, Valderrama O, Farias C, Caselli A, Gabellini P, Cioni R (2021) Low-energy fragmentation dynamics at Copahue Volcano (Argentina) as revealed by an infrasonic array and ash characteristics. Front Earth Sci. 10.3389/feart.2021.578437 DOI: 10.3389/feart.2021.578437
Hantusch M, Melchor I, Caselli A, Maria S, Da P (2021) Actividad sísmica precursora de las fases eruptivas de junio y julio de 2020 del volcán Copahue. Revista de la Asociacion Geologica Argentina 78(1):131–134
Hellweg M (2003) The polarization of volcanic seismic signals: medium or source? J Volcanol Geoth Res 128(1–3):159–176. 10.1016/S0377-0273(03)00252-X DOI: 10.1016/S0377-0273(03)00252-X
Hotovec AJ, Prejean SG, Vidale J, Gomberg J (2013) Strongly gliding harmonic tremor during the 2009 eruption of Redoubt Volcano. J Volcanol Geoth Res 259:89–99. 10.1016/j.jvolgeores.2012.01.001 DOI: 10.1016/j.jvolgeores.2012.01.001
Hurst T, Hashimoto T, Terada A (2015) Crater Lake Energy and Mass Balance. In: Rouwet D, Christenson B, Tassi F, Vandemeulebrouck J (eds) Volcanic Lakes, Advances in Volcanology chapter 13. Springer-Verlag, Berlin Heidelberg, pp 307–321
Ibañez JM, Del Pezzo E, Bengoa C, Caselli A, Badi G, Almendros J (2008) Volcanic tremor and local earthquakes at Copahue volcanic complex, Southern Andes, Argentina. J Volcanol Geoth Res 174(4):284–294. 10.1016/j.jvolgeores.2008.02.005 DOI: 10.1016/j.jvolgeores.2008.02.005
Ichihara M, Matsumoto S (2017) Relative source locations of continuous tremor before and after the Subplinian events at Shinmoe-dake, in 2011. Geophys Res Lett 44(21):10871–10877. 10.1002/2017GL075293 DOI: 10.1002/2017GL075293
Jiménez Morales V, Almendros J, Carmona E (2017) Detection of long-duration tremors at Deception Island volcano, Antarctica. J Volcanol Geoth Res 347:234–249. 10.1016/j.jvolgeores.2017.09.016 DOI: 10.1016/j.jvolgeores.2017.09.016
Jolly A, Caudron C, Girona T, Christenson B, Carniel R (2020) ‘Silent’ Dome emplacement into a wet Volcano: observations from an effusive eruption at White Island (Whakaari), New Zealand in late 2012. Geosciences 10(4):142. 10.3390/geosciences10040142 DOI: 10.3390/geosciences10040142
Julian BR (1994) Volcanic tremor: nonlinear excitation by fluid flow. J Geophys Res 99(B6):11859–11877 DOI: 10.1029/93JB03129
Konstantinou KI, Schlindwein V (2003) Nature, wavefield properties and source mechanism of volcanic tremor: a review. J Volcanol Geoth Res 119(1–4):161–187. 10.1016/S0377-0273(02)00311-6 DOI: 10.1016/S0377-0273(02)00311-6
Konstantinou KI, Ardiani MA, Sudibyo MR (2019) Scaling behavior and source mechanism of tremor recorded at Erebus volcano, Ross island, Antarctica. Phys Earth Planet Inter 290:99–106. 10.1016/j.pepi.2019.03.010 DOI: 10.1016/j.pepi.2019.03.010
Lamberti MC, Vigide N, Venturi S, Agusto M, Yagupsky D, Winocur D, Barcelona H, Velez ML, Cardellini C, Tassi F (2019) Structural architecture releasing deep-sourced carbon dioxide diffuse degassing at the Caviahue - Copahue Volcanic complex. J Volcanol Geoth Res 374:131–141. 10.1016/j.jvolgeores.2019.02.004 DOI: 10.1016/j.jvolgeores.2019.02.004
Leet RC (1988) Saturated and subcooled hydrothermal boiling in groundwater flow channels as a source of harmonic tremor. J Geophys Res 93(B5):4835 DOI: 10.1029/JB093iB05p04835
Li KL, Gudmundsson O (2020) A probabilistic tremor location method. Geophys Res Lett 47(4):1–10. 10.1029/2019GL085538 DOI: 10.1029/2019GL085538
Lundgren P, Nikkhoo M, Samsonov SV, Milillo P, Gil-Cruz F, Lazo J (2017) Source model for the Copahue volcano magma plumbing system constrained by InSAR surface deformation observations. J Geophys Res Solid Earth 122(7):5729–5747. 10.1002/2017JB014368 DOI: 10.1002/2017JB014368
McMechan GA (1982) Resonant scattering by fluid-filled cavities. Bull Seismol Soc Am 72(4):1143–1153 DOI: 10.1785/BSSA0720041143
McNutt SR, Nishimura T (2008) Volcanic tremor during eruptions: temporal characteristics, scaling and constraints on conduit size and processes. J Volcanol Geoth Res 178(1):10–18. 10.1016/j.urology.2015.07.047 DOI: 10.1016/j.urology.2015.07.047
Melchor I, Almendros J, Carniel R, Konstantinou KI, Hantusch M, Caselli A (2020) On data reduction methods for volcanic tremor characterization: the 2012 eruption of Copahue volcano, Southern Andes. Earth Planets Space 72(1):134. 10.1186/s40623-020-01270-7 DOI: 10.1186/s40623-020-01270-7
Montegrossi G, Farina A, Fusi L, De Biase A (2019) Mathematical model for volcanic harmonic tremors. Sci Rep 9(1):14417. 10.1038/s41598-019-50675-2 DOI: 10.1038/s41598-019-50675-2
Montenegro VM, Spagnotto S, Legrand D, Caselli AT (2021) Seismic evidence of the active regional tectonic faults and the Copahue volcano, at Caviahue Caldera. Bulletin of volcanology, Argentina. 10.1007/s00445-021-01442-7 DOI: 10.1007/s00445-021-01442-7
Morales S, Franco L, Valderrama A, Cartes C (2015) Silencios sísmicos en la señal de tremor volcánico, como precursores inmediatos de explosiones durante octubre de 2014 en el volcán Copahue, Chile. (Spanish) [Seismic silences in volcanic tremor as an immediate explosion precursor during October 2014 in Copahue Volcano, Chile]. In: Actas del XIV Congreso Geológico Chileno, pp 69–71
Naismith AK, Matthew Watson I, Escobar-Wolf R, Chigna G, Thomas H, Coppola D, Chun C (2019) Eruption frequency patterns through time for the current (1999–2018) activity cycle at volcán de fuego derived from remote sensing data: evidence for an accelerating cycle of explosive paroxysms and potential implications of eruptive activity. J Volcanol Geoth Res 371:206–219. 10.1016/j.jvolgeores.2019.01.001 DOI: 10.1016/j.jvolgeores.2019.01.001
Nakano M, Kumagai H (2005) Response of a hydrothermal system to magmatic heat inferred from temporal variations in the complex frequencies of long-period events at Kusatsu-Shirane Volcano, Japan. J Volcanol Geoth Res 147(3–4):233–244. 10.1016/j.jvolgeores.2005.04.003 DOI: 10.1016/j.jvolgeores.2005.04.003
Neuberg J, O’Gorman C (2002) A model of the seismic wavefield in gas-charged magma: application to Soufrière Hills Volcano, Montserrat. Geol Soc London Memoirs 21(1):603–609. 10.1144/GSL.MEM.2002.021.01.29 DOI: 10.1144/GSL.MEM.2002.021.01.29
Neuberg J, Pointer T (2000) Effects of volcano topography on seismic broad-band waveforms. Geophys J Int 143(1):239–248. 10.1046/j.1365-246X.2000.00251.x DOI: 10.1046/j.1365-246X.2000.00251.x
Neuberg J, Luckett R, Baptie B, Olsen K (2000) Models of tremor and low-frequency earthquake swarms on Montserrat. J Volcanol Geoth Res 101(1–2):83–104. 10.1016/S0377-0273(00)00169-4 DOI: 10.1016/S0377-0273(00)00169-4
Neuberg JW, Tuffen H, Collier L, Green D, Powell T, Dingwell D (2006) The trigger mechanism of low-frequency earthquakes on Montserrat. J Volcanol Geother Res 153(1–2 SPEC.ISS):37–50. 10.1016/j.jvolgeores.2005.08.008 DOI: 10.1016/j.jvolgeores.2005.08.008
Ogiso M, Matsubayashi H, Yamamoto T (2015) Descent of tremor source locations before the 2014 phreatic eruption of Ontake volcano, Japan 5. Volcanology. Earth Planet Space. 10.1186/s40623-015-0376-y DOI: 10.1186/s40623-015-0376-y
Park J, Vernon FL, Lindberg CR (1987) Frequency dependent polarization analysis of high-frequency seismograms. J Geophys Res 92(B12):12664 DOI: 10.1029/JB092iB12p12664
Park I, Jolly A, Kim KY, Kennedy B (2019) Temporal variations of repeating low frequency volcanic earthquakes at Ngauruhoe Volcano, New Zealand. J Volcanol Geoth Res 373:108–119. 10.1016/j.jvolgeores.2019.01.024 DOI: 10.1016/j.jvolgeores.2019.01.024
Park I, Jolly A, Matoza RS, Kennedy B, Kilgour G, Johnson R, Garaebiti E, Cevuard S (2021) Seismo-acoustic characterisation of the 2018 Ambae (Manaro Voui) eruption. Bull Volcanol. 10.1007/s00445-021-01474-z DOI: 10.1007/s00445-021-01474-z
Prieto G, Parker R, Vernon F III (2009) A Fortran 90 library for multitaper spectrum analysis. Comput Geosci 35:1701–1710. 10.1016/j.cageo.2008.06.007 DOI: 10.1016/j.cageo.2008.06.007
Ripepe M, Gordeev E (1999) Gas bubble dynamics model for shallow volcanic tremor at Stromboli. J Geophys Res Solid Earth 104(B5):10639–10654 DOI: 10.1029/98JB02734
Roeoesli C, Walter F, Ampuero J-P, Kissling E (2016) Seismic moulin tremor. J Geophys Res Solid Earth 121(8):5838–5858. 10.1002/2015JB012786 DOI: 10.1002/2015JB012786
Rust AC, Balmforth NJ, Mandre S (2008) The feasibility of generating low-frequency volcano seismicity by flow through a deformable channel. Geol Soc Spec Pub 307:45–56. 10.1144/SP307.4 DOI: 10.1144/SP307.4
Saccorotti G, Zuccarello L, Del Pezzo E, Ibanez J, Gresta S (2004) Quantitative analysis of the tremor wavefield at Etna Volcano, Italy. J Volcanol Geoth Res 136(3–4):223–245. 10.1016/j.jvolgeores.2004.04.003 DOI: 10.1016/j.jvolgeores.2004.04.003
Samson JC (1983) Pure states, polarized waves, and principal components in the spectra of multiple, geophysical time-series. Geophys J Int 72(3):647–664. 10.1111/j.1365-246X.1983.tb02825.x DOI: 10.1111/j.1365-246X.1983.tb02825.x
Samson JC, Olson JV (1980) Some comments on the descriptions of the polarization states of waves. Geophys J Int 61(1):115–129. 10.1111/j.1365-246X.1980.tb04308.x DOI: 10.1111/j.1365-246X.1980.tb04308.x
Seidl D, Schick R, Riuscetti M (1981) Volcanic tremors at Etna: a model for hydraulic origin. Bull Volcanol 44(1):43–56 DOI: 10.1007/BF02598188
Sherburn S, Scott BJ, Nishi Y, Sugihara M (1998) Seismicity at White Island volcano, New Zealand: a revised classification and inferences about source mechanism. J Volcanol Geoth Res 83(3–4):287–312. 10.1016/S0377-0273(98)00022-5 DOI: 10.1016/S0377-0273(98)00022-5
Takeo M (2021) Harmonic tremor model during the 2011 Shinmoe-dake eruption. Japan. Geophys J Int 224(3):2100–2120. 10.1093/gji/ggaa477 DOI: 10.1093/gji/ggaa477
Tamburello G, Agusto M, Caselli A, Tassi F, Vaselli O, Calabrese S, Rouwet D, Capaccioni B, Di Napoli R, Cardellini C, Chiodini G, Bitetto M, Brusca L, Bellomo S, Aiuppa A (2015) Intense magmatic degassing through the lake of Copahue volcano, 2013–2014. J Geophys Res Solid Earth 120(9):6071–6084. 10.1002/2015jb012160 DOI: 10.1002/2015jb012160
Tárraga M, Martí J, Abella R, Carniel R, López C (2014) Volcanic tremors: good indicators of change in plumbing systems during volcanic eruptions. J Volcanol Geoth Res 273:33–40. 10.1016/j.jvolgeores.2014.01.003 DOI: 10.1016/j.jvolgeores.2014.01.003
Unglert K, Jellinek AM (2015) Volcanic tremor and frequency gliding during dike intrusions at Kilauea-A tale of three eruptions. J Geophys Res Solid Earth 120(2):1142–1158. 10.1002/2014JB011596 DOI: 10.1002/2014JB011596
Varekamp JC, Ouimette AP, Herman SW, Flynn KS, Bermudez A, Delpino D (2009) Naturally acid waters from Copahue volcano, Argentina. Appl Geochem 24(2):208–220. 10.1016/j.apgeochem.2008.11.018 DOI: 10.1016/j.apgeochem.2008.11.018
Velez ML, Euillades P, Blanco M, Euillades L (2016) Ground deformation between 2002 and 2013 from InSAR observations. In: Tassi F, Vaselli O, Caselli AT (eds) Copahue Volcano, active volcanoes of the World chapter 8. Springer-Verlag, Berlin Heidelberg, pp 175–198. https://doi.org/10.1007/978-3-662-48005-2
Withers MM, Aster RC, Young CJ, Chael EP (1996) High-frequency analysis of seismic background noise as a function of wind speed and shallow depth. Bull Seismol Soc Am 86(5):1507–1515 DOI: 10.1785/BSSA0860051507
Yukutake Y, Honda R, Harada M, Doke R, Saito T, Ueno T, Sakai S, Morita Y (2017) Analyzing the continuous volcanic tremors detected during the 2015 phreatic eruption of the Hakone volcano. Earth Planets Space 69(1):164. 10.1186/s40623-017-0751-y DOI: 10.1186/s40623-017-0751-y
