Articles | Volume 20, issue 2
Nat. Hazards Earth Syst. Sci., 20, 377–397, 2020
https://doi.org/10.5194/nhess-20-377-2020
Nat. Hazards Earth Syst. Sci., 20, 377–397, 2020
https://doi.org/10.5194/nhess-20-377-2020

Research article 04 Feb 2020

Research article | 04 Feb 2020

Processes culminating in the 2015 phreatic explosion at Lascar volcano, Chile, evidenced by multiparametric data

Ayleen Gaete et al.

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Cited articles

Aguilera, F., Viramonte, J., Medina, E., Guzmán, K., Becchio, R., Delgado, H., and Arnosio, M.: Recent eruptive activity from lascar volcano (2006), in: 11th Chilean Geological Congress, Universidad Católica del Norte, Antofagasta, Natofagasta, 393–396, 2006. 
Albino, F., Pinel, V., and Sigmundsson, F.: Influence of surface load variations on eruption likelihood: Application to two Icelandic subglacial volcanoes, Grímsvötn and Katla, Geophys. J. Int., 181, 1510–1524, https://doi.org/10.1111/j.1365-246X.2010.04603.x, 2010. 
Barberi, F., Bertagnini, A., Landi, P., and Principe, C.: A review on phreatic eruptions and their precursors, J. Volcanol. Geoth. Res., 52, 231–246, https://doi.org/10.1016/0377-0273(92)90046-G, 1992. 
Bredemeyer, S. and Hansteen, T. H.: Synchronous degassing patterns of the neighbouring volcanoes Llaima and Villarrica in south-central Chile: the influence of tidal forces, Int. J. Earth Sci., 103, 1999–2012, https://doi.org/10.1007/s00531-014-1029-2, 2014. 
Bredemeyer, S., Ulmer, F. G., Hansteen, T. H., and Walter, T. R.: Radar path delay effects in volcanic gas plumes: The case of Láscar Volcano, Northern Chile, Remote Sens., 10, 1514, https://doi.org/10.3390/rs10101514, 2018. 
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Short summary
Phreatic eruptions often occur without signs of enhanced volcanic unrest, avoiding detection and posing a threat to people in the vicinity. We analyzed data of the 2015 phreatic eruption of Lascar volcano, Chile, to retrospectively identify a precipitation event as the trigger mechanism and potential signs heralding this minor eruption. We showed that it is possible to detect the precursory activity of phreatic eruptions by deploying appropriate multiparametric monitoring.
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