Publication Date:
2021-12-15
Description:
Relationships between frequency and intensity of
volcanic eruptions are actively sought by geophysicists
for both monitoring and research purposes. By analyzing
surveillance videos of persistent volcanic activity at
Stromboli (Italy), we derived the frequency and jet height
of 〉4000 explosions that occurred in 72 h-long time
windows sampled yearly from 2005 to 2009. We found a
positive relationship linking explosion frequency and jet
height (linked to eruption intensity) when averaging the
two parameters over time intervals from hours to days, with
a stronger correlation for longer intervals. We interpret
this behavior as the response of the magmatic system
to variable influx of magma and gas at depth, increased flux
at depth causing more frequent and stronger explosions
at the surface. This relationship entails concurrent control
of source processes over explosion frequency and intensity,
directly impacting modeling of explosion sources at
persistently active volcanoes in general and hazard
assessment at Stromboli in particular.
Description:
DPC-INGV Project V2 “Paroxysm”
Description:
Published
Description:
1–5
Description:
3V. Dinamiche e scenari eruttivi
Description:
JCR Journal
Description:
reserved
Keywords:
Stromboli
;
Strombolian frequency
;
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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