Categories
TERRESTRIAL AEROSOLS
Summary: AEROSOLS
Micron- cosmic analogs subcategories
Asteroids
Circumstellar shells
Comets
Terrestrial Aerosols Subcategories
Volcanic
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 17 September 1992 eruption and were collected 265 km east of the volcano
Main constituent
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 Fraunhofer: reff (μm)
3.5
Particle size Fraunhofer: veff
8.2
Size distribution plot
Size distribution table
Particle shape
irregular
All SEM images (zip file)
Refractive index
estimated to be in the range [1.48-1.56] + i[0.0018-0.02]
Color
dark gray
Scattering matrix (1) wavelength in nm
632.8
Scattering matrix (1) plot
Scattering matrix (1) table
Angle range (deg)
[3,174]
Paper (pdf)
Full reference paper
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
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