Publication Date:
2021-06-25
Description:
In contrast to the seismic and infrasonic energy released
from quiescent and erupting volcanoes, which have long been
known to manifest episodes of highly periodic behavior,
the spectral properties of volcanic gas flux time series
remain poorly constrained, due to a previous lack of hightemporal
resolution gas-sensing techniques. Here we report
on SO2 flux measurements, performed on Mount Etna
with a novel UV imaging technique of unprecedented
sampling frequency (0.5 Hz), which reveal, for the first
time, a rapid periodic structure in degassing from this
target. These gas flux modulations have considerable
temporal variability in their characteristics and involve two
period bands: 40–250 and 500–1200 s. A notable correlation
between gas flux fluctuations in the latter band and
contemporaneous seismic root-mean-square values suggests
that this degassing behavior may be generated by periodic
bursting of rising gas bubble trains at the magma-air interface.
Description:
Published
Description:
4818–4822
Description:
1.2. TTC - Sorveglianza geochimica delle aree vulcaniche attive
Description:
JCR Journal
Description:
restricted
Keywords:
SO2 flux
;
UV camera
;
04. Solid Earth::04.08. Volcanology::04.08.01. Gases
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
