Observations of Deformation

Volcano number:372070
Geodetic measurements?Yes
Deformation observation?Yes
Measurement method(s):InSAR, GPS - continuous, GPS - campaign, Levelling, Strainmeter, Tiltmeter, EDM
Duration of observation:Continuous
Inferred cause(s) of deformation:Magmatic
Characteristics of deformation:

Sturkell et al. (2013) studied Hekla’s last eruption in 2000 using campaign GPS; an InSAR interferogram; dry tilt data, and borehole strain data. They found the presence of a dike that “causes surface fissuring extends no more than ~ 0.5 km in depth, and the reservoir depth is ~ 10 km. These are connected by a conduit of small lateral extent. Data for previous eruptions are consistent with this model”.
There are numerous studies based on deformation datasets published on Hekla and yield estimated reservoir depths from 5 to 10 km (Sturkell et al. 2013 and references therein). In general “Hekla shows a few long-term precursors to eruptions: optical tilt, GPS and InSAR give indications of upcoming eruptions” (Sturkell et al. 2013).

Reference(s):Sturkell, E., K Ágústsson, A. T. Linde, S. I. Sacks, P. Einarsson, F. Sigmundsson, H. Geirsson, R. Pedersen, Peter C. LaFemina, H. Ólafsson, New insights into volcanic activity from strain and other deformation data for the Hekla 2000 eruption, JVGR, http://dx.doi.org/10.1016/j.jvolgeores.2013.02.001
Smithsonian Institution Global Volcanism Program
Location:63.98, -19.7
REST API endpoint (JSON):https://comet.nerc.ac.uk/wp-json/volcanodb/v1/volcano/3038

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