J. L. Naranjo, H. Sigurdsson, S. N. Carey, and W. Fritz, Eruption of the Nevado del Ruiz volcano, Colombia, on 13 November 1985: tephra fall and lahars, Science, vol.233, pp.961-963, 1986.

T. C. Pierson, R. J. Janda, J. C. Thouret, and C. A. Borrero, Perturbation and melting of snow and ice by the 13 November 1985 eruption of Nevado del Ruiz, Colombia, and consequent mobilization, flow and deposition of lahars, J. Volc. Geothermal Res, vol.41, pp.17-66, 1990.

B. Voight, The 1985 Nevado del Ruiz volcano catastrophe: anatomy and retrospection, J. Volc. Geothermal Res, vol.42, pp.151-188, 1990.

J. C. Thouret, Quaternary eruptive history and hazard-zone model at Nevado del Tolima and Cerro Machin volcanoes, Colombia, J. Volc. Geothermal Res, vol.66, pp.397-426, 1995.

L. Siebert, T. Simkin, and P. Kimberly, , vol.568, p.p, 2010.

C. Servicio-geologico, Informe Técnico Anual de la actividad volcánica del segmento volcánico norte de Colombia, Spanish, 2016.

S. C. Moran, Seismicity Associated with Renewed Dome Building at Mount St. Helens, Geological Survey Professional Paper, vol.2, p.1750, 2004.

M. Ordoñez, Keeping watch over Colombia's slumbering volcanoes, Eos, vol.96, 2015.

P. Lundgren, S. V. Samsonov, C. M. Velez, and M. Ordoñez, Deep source model for Nevado del Ruiz Volcano, Colombia, constrained by interferometric synthetic aperture radar observations, Geophys. Res. Lett, vol.42, pp.4816-4823, 2015.

, SCIeNtIfIC REPORTS |, vol.7, p.46094

J. M. Londono and Y. Sudo, Spectral characteristics of volcano-tectonic earthquake swarms in Nevado del Ruiz Volcano, Colombia, J. Volc. Geothermal Res, vol.112, pp.37-52, 2001.

J. M. Londoño, Temporal change in coda Q at Nevado del Ruiz Volcano, Colombia, J. Volc. Geothermal Res, vol.73, pp.129-139, 1996.

J. M. Londoño and Y. Sudo, Velocity structure and a seismic model for Nevado del Ruiz Volcano (Colombia), J. Volc. Geothermal Res, vol.119, pp.61-87, 2003.

D. Patanè, G. Barberi, O. Cocina, P. De-gori, and C. Chiarabba, Time-resolved seismic tomography detects magma intrusions at Mount Etna, Science, vol.313, pp.821-823, 2006.

I. Koulakov, Rapid changes in magma storage beneath the Klyuchevskoy group of volcanoes inferred from time-dependent seismic tomography, J. Volc. Geothermal Res, vol.263, pp.75-91, 2013.

E. Kasatkina, I. Koulakov, M. West, and P. Izbekov, Seismic structure changes beneath Redoubt Volcano during the 2009 eruption inferred from local earthquake tomography, J. Geophys. Res. Solid Earth, vol.119, pp.4938-4954, 2014.

I. Koulakov, V. Gladkov, S. El-khrepy, N. Al-arifi, and I. H. Fathi, Application of repeated passive source travel time tomography to reveal weak velocity changes related to the 2011 Tohoku-Oki Mw 9.0 earthquake, J. Geophys. Res Solid Earth, vol.120, pp.4408-4426, 2016.

I. Koulakov, M. West, and P. Izbekov, Fluid ascent during the 2004-2005 unrest at Mt. Spurr inferred from seismic tomography, Geophys. Res. Lett, vol.40, pp.4579-4582, 2013.

S. N. Chatterjee, A. M. Pitt, and H. M. Iyer, Vp/Vs ratios in the Yellowstone National Park region, J. Volc. Geothermal Res, vol.26, pp.213-230, 1985.

Y. Takei, Effect of pore geometry on VP/VS: From equilibrium geometry to crack, J. Geophys. Res, vol.107, p.2043, 2002.

C. Oppenheimer, B. Scaillet, and R. S. Martin, Sulfur degassing from volcanoes: source conditions, surveillance, plume chemistry and earth system impacts, Reviews in Mineralogy and Geochemistry, vol.73, pp.363-421, 2011.
URL : https://hal.archives-ouvertes.fr/insu-00614926

P. J. Wallace, Volcanic SO 2 emissions and the abundance and distribution of exsolved gas in magma bodies, Journal of Volcanology and Geothermal Research, vol.108, pp.85-106, 2001.

B. Scaillet and M. Pichavant, A model of sulphur solubility for hydrous mafic melts: application to the determination of magmatic fluid compositions of Italian volcanoes, Annals of Geophysics, vol.48, pp.671-698, 2005.
URL : https://hal.archives-ouvertes.fr/hal-00079843

J. Stix, G. D. Layne, and S. N. Williams, Mechanisms of degassing at Nevado del Ruiz volcano, Colombia, Journal of the Geological Society, vol.160, pp.507-521, 2003.

S. Tait, C. Jaupart, and S. Vergniolle, Pressure, gas content and eruption periodicity of a shallow, crystallising magma chamber, Earth and Planetary Science Letters, vol.92, pp.107-123, 1989.

H. E. Huppert and A. W. Woods, The role of volatiles in magma chamber dynamics, Nature, vol.420, pp.493-495, 2002.