Observations of Deformation

Volcano number:353010
Geodetic measurements?Yes
Deformation observation?Yes
Measurement method(s):InSAR
Duration of observation:January 2003 to September 2010, 1992- 1999 (ref2)
Inferred cause(s) of deformation:Magmatic
Characteristics of deformation:

At least two sources are considered to represent permanent zones of magma storage given their persistent or recurrent activity. Elastic deformation models indicate the presence of a flat-topped magma reservoir at ∼1.1 km below sea level and an oblate-spheroid cavity at ∼4.9 km b.s.l. The two reservoirs are hydraulically connected. Ref 1.
Fernandina exhibits a semi-circular fringe pattern on its southwest flank (Fig. 1), which has been modelled with a dipping, radial dyke coincident with the 1995 eruption6. Uplift of 0.1 m from September 1998 to March 1999 suggests refilling of a shallow magma chamber. Ref 2

Reference(s):Bagnardi, M., & Amelung, F. (2012). Space‐geodetic evidence for multiple magma reservoirs and subvolcanic lateral intrusions at Fernandina Volcano, Galápagos Islands. Journal of Geophysical Research: Solid Earth, 117(B10).
Amelung, F., S. Jónsson, H. Zebker, and P. Segall (2000), Widespread uplift and “trapdoor” faulting on Galápagos volcanoes observed with radar interferometry, Nature, 407, 993–996, doi:10.1038/35039604.
Location:-0.37, -91.55
REST API endpoint (JSON):https://comet.nerc.ac.uk/wp-json/volcanodb/v1/volcano/1963

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