Figure 3
From: UK monitoring and deposition of tephra from the May 2011 eruption of Grímsvötn, Iceland
Results of public tape-on-paper sampling. (a) Map of sample locations and presence of tephra. There is good coverage across the UK. All samples with ‘Likely tephra’ came from Scotland and most samples from southern England were classed ‘No tephra’. Data plotted as circles were triple-checked by two ‘blind’ operators; diamonds were checked once. (b) Plot of sample collection time versus latitude. Each bar represents an individual sample and runs from the exposure start time to the end time. All likely tephra samples overlap on 24 May 2011.