Daily time series of matrix glass composition from tephra samples from the 2021 Tajogaite eruption at Cumbre Vieja volcano (La Palma, Canary Islands)

Ash and lapilli samples were continuously collected during the 2021 eruption of Cumbre Vieja volcano. This dataset reports the major and volatile (S, Cl) element compositions of matrix glasses from these samples. Data were acquired by electron probe microanalysis at the American Museum of Natural History and are given for 85 samples and 4 duplicates, resulting in a daily time series of erupted melt composition capturing 94% of the eruptive sequence.