Publication Date:
2017-04-04
Description:
The Colli Albani volcanic complex (Rome,
Italy) has been dominated by episodic eruptions commencing
around 561 ka and ending with the most recent
activity of the Albano maar phase (\70 ka). Earthquakes of
moderate intensity, gas emissions and significant ground
deformations are the recent evidences of a residual activity.
Former geodetic data from leveling surveys, GPS stations
and InSAR observations tracked ongoing significant uplift
of the order of few mm/year near the Colli Albani western
flank. Different uplift rates were detected by each technique
in different time spans, suggesting also the possibility
of sporadic recharge of the hydrothermal system. The
renewed high precision leveling data from IGMI survey
carried out in 1997/1999 and the last leveling survey carried
out in 2006 show that the uplift along the route is
currently significant at an average rate of *3 mm/year.
Radar interferograms from ALOS satellite show uplift rate
of *6 mm/year, southwest of the central sector of the
leveling route. We have undertaken a joint inversion of the
various geodetic data (vertical rates from leveling surveys,
GPS site velocities and InSAR observations acquired by
ALOS satellite) using a nonlinear inversion technique to
estimate the parameters of a point-pressure source, possibly
capable of explaining the ongoing deformation at Colli
Albani volcano.
Description:
Published
Description:
1661-1671
Description:
1.3. TTC - Sorveglianza geodetica delle aree vulcaniche attive
Description:
JCR Journal
Description:
restricted
Keywords:
Colli Albani
;
GPS
;
Leveling
;
InSAR
;
Volcano monitoring
;
Mogi source
;
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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