Observations of Deformation

Volcano number:222052
Geodetic measurements?Yes
Deformation observation?Yes
Measurement method(s):InSAR
Duration of observation:January 2007 - January 2010
Inferred cause(s) of deformation:Hydrothermal, Magmatic
Characteristics of deformation:

Subsidence has been observed at Silali between 2007 Р2010. A radially symmetric signal centred on the calderas western edge (-1.6 +/- 0.4 cm/yr los displacement) was observed using ALOS data. This deformation is believed to have occurred at a linear rate of -1.5 +/- 0.8 cm/yr, and can  be modelled as a point geometry at a depth of 3.9 km (Robertson, 2015).
To the NW of Silali ~ 2 cm of subsidence associated with an active hydrothermal system (Kepedo Hot Springs) is observed.

Reference(s):Robertson, E. 2015. Magma storage and transport at Kenyan Rift volcanoes: a remote sensing perspective. Chapter 2. Ph.D Thesis, University of Bristol, UK.
Smithsonian Institution Global Volcanism Program
Location:1.15, 36.23
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Latest Sentinel-1 Data

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