In English

Development and implementation of a rapid deployment system for volcanic gas emission monitoring

Vladimir Conde
Göteborg : Chalmers tekniska högskola, 2012. 39 s.
[Examensarbete på avancerad nivå]

Volcanic eruptions are one of the most impressing geophysical phenomenons. There are more than 500 active volcanoes around the world. Across the time, large populations have been benefitted with better agriculture in volcanic soils due to natural fertilization. On the other hand active volcanoes close to populated areas represent a natural hazard. A constant monitoring of the volcano activity reduces the risk in potentially affected areas; for the last decades this has motivated the development of different volcanic surveillance techniques: seismicity, geodesy and geochemistry. In particular, monitoring volcanic gas emissions has acquired major importance as an indicator of changes in the volcanic activity. Among different ways to do that, optical remote sensing has been successfully applied as an efficient and safe method to quantify volcanic gas emissions. This thesis presents the design of a network of optical remote sensing instruments for monitoring volcanic gas emissions. The monitoring technique is based on DOAS (Differential Optical Absorption Spectroscopy). The system compiles measuring techniques previously developed by the Optical Remote Sensing Group of Chalmers in a deployable way, taking advantage of recent hardware development. This network was tested in a real application, making SO2 flux measurements continuously during 3 months at Télica volcano (Nicaragua), and transmitting the data by a satellite link to a server located at Chalmers. A shorter experiment was also conducted at Popocatépetl volcano (México) where the portability of the systems allows us to keep tracking the wide variations of the volcanic plume.



Publikationen registrerades 2012-10-24. Den ändrades senast 2013-04-04

CPL ID: 165057

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