Lanzarote is the northern and eastern-most Canary Island, located in the eastern Atlantic Ocean near the continental margin and about 100 km off the west coast of Africa (Figure 1a). Like the surrounding archipelago, it is a small volcanic intraplate oceanic island, mostly probably created over the last 15 million years from hot spot volcanism in the Miocene, Pliocene and the Quaternary (Carracedo et al., 1998;Hoernle & Schmincke, 1993). The long-term evolution of the islands, and the degree to which tectonic processes influence this, is still a matter of ongoing debate (Anguita & Hernán, 2000;Blanco-Montenegro et al., 2018;Negredo et al., 2022). The Lanzarote style of eruption activity is typified by low-explosive outpourings of basaltic magma from fissures (Carracedo et al., 1992). The largest of these events in the past half millennium was the 6-year intermittent eruption between 1730 and 1736, where an estimated 3-5 km 3 (Carracedo, 2014) of material was erupted over much of the island of Lanzarote (Figure 1a). This eruption is also the third largest historical basaltic fissure eruption in the last 1,100 years behind a pair of Icelandic eruptions in 1783-84 Laki (Lakagígar), comprising 14 km 3 of lava