“…1a). The age of this eruption is poorly constrained; Quidelleur et al (2001) date it at 500-1100 BP, Carracedo et al (2007) at 1000-1300 BP and, based on geomagnetic secular variation, it has been dated at 630 BP (V. Soler, personal communication, 1998). Prior to this last eruption, the summit of Teide underwent at least two episodes of vertical collapses (Fig.…”