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Geosciences 2018, 8(6), 193; https://doi.org/10.3390/geosciences8060193

Temperature and Conductivity as Indicators of the Morphology and Activity of a Submarine Volcano: Avyssos (Nisyros) in the South Aegean Sea, Greece

1
Department of Physics, National Kapodistrian University of Athens, 15784 Athens, Greece
2
Dipartimento di Chimica “G. Ciamician”, Universita di Bologna, 40126 Bologna, Italy
3
Department of Geology & Geoenvironment, National Kapodistrian University of Athens, 15784 Athens, Greece
*
Author to whom correspondence should be addressed.
Received: 29 March 2018 / Revised: 19 May 2018 / Accepted: 25 May 2018 / Published: 28 May 2018
(This article belongs to the Special Issue Submarine Volcanic Hazards: Ancient and Modern Perspectives)
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Abstract

The morphology and the activity of a submarine caldera, Avyssos, at the northern part of Nisyros volcano in the South Aegean Sea (Greece), has been studied by means of remotely-operated underwater vehicle dives. The recorded time series of temperature and conductivity over the submarine volcano have been analyzed in terms of the generalized moments method. The findings of the mathematical analysis shed light on the volcanic activity, but also on the morphology (shape) of the submarine volcano. The conductivity time series indicates that the volcano is at rest, in agreement with other types of observations. On the other hand, temperature fluctuations, which in general describe a multifractal process, show that the submarine caldera operates as an open system that interacts with its surroundings. This type of analysis can be used as an indicator for the state of activity and the morphological structure (closed or open system) of a submarine volcano. View Full-Text
Keywords: generalized moments method; time series; submarine volcano; Nisyros generalized moments method; time series; submarine volcano; Nisyros
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Bakalis, E.; Mertzimekis, T.J.; Nomikou, P.; Zerbetto, F. Temperature and Conductivity as Indicators of the Morphology and Activity of a Submarine Volcano: Avyssos (Nisyros) in the South Aegean Sea, Greece. Geosciences 2018, 8, 193.

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