Lanzarote

Volcano number:383060
Region:Atlantic Ocean
Country:Spain
Geodetic measurements?Yes
Deformation observation?Yes
Measurement method(s):InSAR
Duration of observation:1992 to 2000
Inferred cause of deformation:Magmatic
Characteristics of deformation:

Romero et al. (2003) analysed 6 ERS SAR images. They distinguished relatively important atmospheric contributions in the differential interferograms and no large ground deformations during the studied period (1992–2000).

Gonzalez & Fernandez (2011) analysed 14 ERS SAR images acquired in the period 1992–2000. They detected subsidence around Timanfaya volcano where the last eruption in 1730–1736 occurred. Deformation closely follows the surface temperature anomalies indicating that magma crystallization (cooling and contraction) of the 300-year shallow magmatic body under Timanfaya volcano is still ongoing.

The area of Lanzarote (and northern islets) is stable at the level of ∼±1 mm/year during t1992 to 2000. The subsidence covers two areas (central part and northwestern coast). The largest deformation rates are associated to the Timanfaya eruption area (Montañas del Fuego) with linear velocities of 4–6 mm/year, and affecting an area of ≈7 km2. The second deformation area is smaller in magnitude (3–4 mm/year) and located on the northwestern coast (Gonzalez & Fernandez, 2011).

 

Reference:Gonzalez, P. J., & Fernandez, J. (2011). Error estimation in multitemporal InSAR deformation time series, with application to Lanzarote, Canary Islands. Journal of Geophysical Research: Solid Earth (1978–2012), 116(B10).
Reference:Romero, R., D. Carrasco, V. Araña, and J. Fernández (2003), A new approach to the monitoring of deformation on Lanzarote (Canary Islands): An 8-year perspective, Bull. Volcanol., 65, 1–7, doi:10.1007/s00445-002-0232-3.
Reference:Smithsonian Institution Global Volcanism Program
http://www.volcano.si.edu/volcano.cfm?vn=383060
Location:-13.63, 29.03

View of Lanzarote volcano. Source: Smithsonian Institution Global Volcanism Program