Articles | Volume 9, issue 2
Solid Earth, 9, 247–266, 2018
Solid Earth, 9, 247–266, 2018

Research article 07 Mar 2018

Research article | 07 Mar 2018

Periodicity in the BrO∕SO2 molar ratios in the volcanic gas plume of Cotopaxi and its correlation with the Earth tides during the eruption in 2015

Florian Dinger et al.

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Cited articles

Agnew, D. C.: Earth tides, in: Treatise on Geophysics and Geodesy, Elsevier, New York, 163–195, 2007.
Aguilera, E., Pareschi, M. T., Rosi, M., and Zanchetta, G.: Risk from Lahars in the Northern Valleys of Cotopaxi Volcano (Ecuador), Nat. Hazards, 33, 161–189,, 2004.
Aiuppa, A.: Degassing of halogens from basaltic volcanism: insights from volcanic gas observations, Chem. Geol., 263, 99–109,, 2009.
Alvarado, A., Audin, L., Nocquet, J. M., Jaillard, E., Mothes, P., Jarrín, P., Segovia, M., Rolandone, F., and Cisneros, D.: Partitioning of oblique convergence in the Northern Andes subduction zone: migration history and the present-day boundary of the North Andean Sliver in Ecuador, Tectonics, 35, 1048–1065,, 2016.
Bagnato, E., Aiuppa, A., Bertagnini, A., Bonadonna, C., Cioni, R., Pistolesi, M., Pedone, M., and Hoskuldsson, A.: Scavenging of sulphur, halogens and trace metals by volcanic ash: the 2010 Eyjafjallajökull eruption, Geochim. Cosmochim. Ac., 103, 138–160,, 2013.
Short summary
We monitored the bromine monoxide-to-sulfur dioxide molar ratio in the effusive gas plume of Cotopaxi volcano in order to gain insight into the geological processes which control the pressure regime of the volcanic system. We observed a conspicuous periodic pattern with a periodicity of about 2 weeks, which significantly correlates with the Earth tidal forcing. Our results support a possible Earth tidal impact on volcanic activity, in particular for the Cotopaxi eruption 2015.