GeoHazards: Volcanic Eruptions: Tungurahua
More information on the Tungurahua Volcano will be posted here soon.
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| Map representing the location of the Tungurahua Volcano, Eccaudor. Created by Jorge V. Bajo. | Eruption of Tungurahua Volcano, Ecuador in 2006. This eruption produced pyroclastic flows that killed 5 people. Photo by Patrick Taschler. |
Sheridan, MF, Patra, AK, Dalbey, K, Stinton, A, (2007), Computer map of PF inundation probability: August 2006 PFs at Tungurahua, Ecuador, Eos Trans. AGU, 88(23), Jt. Assem. Suppl., Abstract V33C-01:
In the summer of 2006 Tungurahua produced its most intense pyroclastic activity since the current eruptive cycle began in October 1999. In mid-July and again in mid-August more than 20 pyroclastic flows descended ravines on the north to west flanks of the volcano causing at least five deaths and destroying property and livestock. These August 16 pyroclastic flows provide a good data base for calibrating models used in hazard mapping. Titan provides a solution to mapping problems by providing a probabilistic calculation of inundation depth that takes into account many of the critical uncertainties using a PCQ methodology to reduce computation time. We used TITAN to map potential inundation areas for future block-and-ash flows at Tungurahua, Ecuador. Realizations of our probabilistic hazard mapping used a linear log frequency to log volume distribution similar to flows at Unzen with initial volumes ranging from 7.5 x 10^5 to 10^7 m^3. We generated two sets of maps, one for the probability that the height will exceed 1 m on the next event and a second that the probability that the height will exceed 0.2 m on the next event. The results for the PCQ analysis compares closely with the actual mapping of the pyroclastic flows done by the Instituto Geofisico immediately after the eruptions.
A.J. Stinton, M.F. Sheridan, Journal of Volcanology and Geothermal Research 176 (2008) 134–140: