Figure 7
From: UK monitoring and deposition of tephra from the May 2011 eruption of Grímsvötn, Iceland
Map of SEPA rainwater chemistry stations. No stations recorded significant anomalies in pH or fluorine concentration. The concentration of iron and other elements was measured at stations marked by circles. Stations with anomalously high iron (Fe) concentrations (> 1 m g l-1) on 24–27 May are coloured red.