See more from this Division: Topical Sessions
See more from this Session: Modeling and Simulation of Dangerous Phenomena, and Innovative Techniques for Hazard Evaluation, Mapping, and Mitigation
Abstract:
At Masaya we saw fumarole temperatures increase by 3 to 5 °C during activity at the vent 3.5 km away. These temperature increases showed clear evidence of volcanic, meteorologic and hydrologic interaction. They also raise questions about the factors controlling fumarolic activity at Masaya volcano in particular and at active volcanoes in general. We recorded rapid, cyclical variations in the temperature signals at our distal site that correspond to volcanic activity, but with an apparently important link to the atmosphere, as temperature transients often correlated with rainfall events. Current models do not address this level of detail or emphasize the effect of the local groundwater system. Using finite element modeling we have begun to recreate the system at Masaya and have found that permeability, pressure and fumarolic gas interaction with groundwater are important variables. Continued collection and analysis of temperature measurements helps to improve our understanding of volcanic systems, potentially helping in forecasting eruptive activity.
See more from this Division: Topical Sessions
See more from this Session: Modeling and Simulation of Dangerous Phenomena, and Innovative Techniques for Hazard Evaluation, Mapping, and Mitigation