Laser diffraction grain size measurements of volcanic ash sourced from explosive eruptions that produced volcanic lightning

Ash fall samples were collected following several explosive eruptions
where volcanic lightning was detected or documented. Sample information
(volcano location, sample collection location, distance from the
associated volcano) is provided in the named spreadsheet. The data
provided in the individual documents (titled with sample name) provide the
instrument parameters and raw grain size measurements of ash samples. The
data were collected using the Malvern 3000 laser diffraction particle size
analyzer (LDPSA) with wet dispersion unit housed in the Earth Materials
Characterization Laboratory at The University of Alabama.