Publication Date:
2017-04-04
Description:
Mount Etna, in Italy, is one of the most active volcanoes in the world and an ideal laboratory
to improve volcano ash monitoring and forecasting. During the volcanic episode on 12 August 2011, an
eruption column rose up to several kilometers above sea level (asl), and the volcanic plume dispersed to the
southeast. From the video-surveillance system, we were able to estimate variations in the column height
(peak value of 9.5 ± 0.5km above sea level) with time. We derived the time-varying discharge rate (peak value
of 60m3 s 1) and determined the ash concentration using a volcanic ash dispersal model. The modeled
ash concentration was compared with lidar measurements using different particle effective radius, and
differences are within the error bars. Volcanic ash concentrations range from 0.5 to 35.5 × 10 3gm 3. The
comparison highlights that to improve volcanic ash forecasting during volcanic crises it is necessary to take
into account the time-varying discharge rate of explosive eruptions.
Description:
Published
Description:
2634–2641
Description:
3V. Dinamiche e scenari eruttivi
Description:
JCR Journal
Description:
reserved
Keywords:
volcanic ash concentration
;
Etna eruption
;
04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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