Publication Date:
2022-05-04
Description:
Abstract San Miguel volcano, El Salvador, erupted on 29 December 2013, after a 46 year period
characterized by weak activity. Prior to the eruption a trend of increasing SO2 emission rate was observed,
with all values measured after mid-November greater than the average value of the previous year (~310 t d 1).
During the eruption, SO2 emissions increased from the level of ~330 t d 1 to 2200 t d 1, dropping after the
eruption to an average level of 680 t d 1. Wind measurements and SO2 emission rates during the preeruptive,
syneruptive, and posteruptive stages were used to model SO2 dispersion around the volcano. Atmospheric
SO2 concentration exceeded the dangerous threshold of 5 ppm in the crater region and in some sectors with
medium elevation of the highly visited volcanic cone. Combining the SO2 emission rate with measured
CO2/SO2, HCl/SO2, and HF/SO2 plume gas ratios, we estimate the CO2, HCl, and HF outputs for the first time
on this volcano.
Description:
Published
Description:
5847–5854
Description:
3V. Dinamiche e scenari eruttivi
Description:
JCR Journal
Description:
restricted
Keywords:
SO2 flux, Clorine and CO2 at San miguel, cloud dispersion and hazard
;
04. Solid Earth::04.08. Volcanology::04.08.01. Gases
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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