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).