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Discussion papers
https://doi.org/10.5194/se-2019-31
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-2019-31
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 08 Apr 2019

Research article | 08 Apr 2019

Review status
This discussion paper is a preprint. A revision of the manuscript is under review for the journal Solid Earth (SE).

Cyclic activity of Fuego de Colima volcano (Mexico): insights from satellite thermal data and non-linear models

Silvia Massaro1, Antonio Costa2, Roberto Sulpizio1,3, Diego Coppola4, and Lucia Capra5 Silvia Massaro et al.
  • 1Istituto per la Dinamica dei Processi Ambientali – Consiglio Nazionale delle Ricerche, Via R. Cozzi 53, 20125, Milan, Italy
  • 2Istituto Nazionale di Geofisica e Vulcanologia, Via D. Creti 12, 40128, Bologna, Italy
  • 3Dipartimento di Scienze della Terra e Geoambientali, Università di Bari, Via Orabona 4, 70125, Bari, Italy
  • 4Dipartimento di Scienze della Terra, Università di Torino, Via Valperga Caluso, 35, 10129, Turin, Italy
  • 5Centro de Geociencias UNAM, Campus Juriquilla, Queretaro, Mexico

Abstract. The Fuego de Colima volcano (Mexico) showed a complex eruptive behaviour with periods of rapid and slow lava dome growth, punctuated by explosive activity. We reconstructed the weekly discharge rate average between 1998 and 2018 by means of satellite thermal data integrated with published discharge rate data. By using spectral and wavelet analysis, we found a multi-year long-, multi-month intermediate-, and multi-week short-term cyclic behaviour during the period of the investigated eruptive activity, as those of many others dome-forming volcanoes. We use numerical modelling in order to investigate the non-linear cyclic eruptive behaviour considering a magma feeding system composed of a dual or a single magma chamber connected to the surface through an elastic dyke evolving into a cylinder conduit in the shallowest part. We investigated the cases in which the periodicity is controlled by i) the coupled deep-shallow magma reservoirs, ii) the single shallow chamber, and iii) the elastic shallow dyke when is fed by a fixed influx rate or a constant pressure. The model outputs indicate that the observed multi-year periodicity (1.5–2.5 years) can be described by the fluctuations controlled by a shallow magma chamber with a volume of 20–50 km3 coupled with a deep reservoir of 500 km3, connected through a deep elastic dyke. The multi-month periodicity (ca. 5–10 months) appears to be controlled by the shallow magma chamber for the same range of volumes. The short-term multi-week periodicity (ca. 2.5–5 weeks) can be reproduced considering a fixed influx rate or constant pressure at the base of the shallower dyke. This work provides new insights on the non-linear cyclic behaviour of Fuego de Colima, and a general framework for the comprehension of eruptive behaviour of andesitic volcanoes.

Silvia Massaro et al.
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