[1] ICTJA CSIC, Grp Volcanol, Inst Earth Sci Jaume Almera, Barcelona, Spain
[2] Geol Survey Spain IGME, Unit Canary Isl, Las Palmas Gran Canaria, Spain
[3] Univ Granada, Dept Geodynam, Campus Univ Fuentenueva, Granada, Spain
[4] Univ La Laguna, Dept Geog, La Laguna Santa Cruz Ten, Spain