Data in this database are freely available under the request of citation of this paper and the paper in which the data were published.
Spurr (Ashton)
| origin | crater Peak on the south side of Mount Spurr volcano, across Cook Inlet, Alaska, USA, 125 km west of Anchorage. The particles are from the 18 August 1992 eruption and were collected 270 km southeast of the volcano |
| main constituents | 57-78 wt% glass, plagioclase feldspar, opx, magnetite, amphibole, cpx |
| practical significance | interpretation of remote sensing data. Analogues of other planets' atmospheric dust, and dust in comets, asteroids, and circumstellar shells |
| particle size | measured size distributions Fraunhofer: reff=2.7 μm, veff=4.9 |
| particle shape | irregular |
| refractive index | estimated to be in the range [1.48-1.56] + i[0.0018-0.02] |
| color | dark gray |
| scattering matrix | 632.8 nm |
| article | Muñoz O,Volten H, Hovenier JW, Veihelmann B, van der Zande WJ, Waters LBFM, Rose WI. Scattering matrices of volcanic ash particles of Mount St. Helens, Redoubt, and Mount Spurr Volcanoes. Journal of Geophysical Research, vol. 109, D16201, 2004 |
