Publication Date:
2020-02-24
Description:
We present new insights into the short- and long-term thermal activity of the
Nyiragongo lava lake by ground-based and satellite infrared thermal imagery recorded in
the first half of 2012. This is the very first time in which FLIR camera and SEVIRI data have
been compared at this volcano. Maximum temperatures recorded at the molten lava were of
~1180 K, whereas the lake skin remained always below ~734 K in areas far from the
upwelling zone and below ~843 K in those proximal to the source region. Ground-based
imagery yielded mean radiative power values between ~0.80 and 1.10 GW. Consistently,
satellite observations showed similar mean values of 1.10 GW. Overall the thermal activity
of the lava lake was quite variable along the three days of field measurements at both daily
and intradaily scale. SEVIRI radiative power values retrieved for the January–June 2012
period revealed fluctuations within the same variability range suggesting that no significant
changes of the lava lake area had occurred over the six months. Comparison with previous
radiative power estimates showed that our data well agree with the general increasing trend
recorded since the reappearance of the lava lake after the last flank eruption in 2002.
Description:
This study was funded by Zanskar Producciones, Cabildo Insular de
Tenerife, and the Instituto Volcanológico de Canarias. We are grateful to
EUMETSAT for providing us SEVIRI data and to NASA for the Landsat
7 image. Letizia Spampinato thanks Dr S. Giammanco for funding her
research activity on the VIGOR project.
Description:
Published
Description:
5771–5784
Description:
1.5. TTC - Sorveglianza dell'attività eruttiva dei vulcani
Description:
JCR Journal
Description:
restricted
Keywords:
thermal imagery
;
satellite thermal images
;
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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