Geophysical Research Letters, doi:10.1002/grl.50286, 2013
TerraSAR-X interferometry reveals small-scale deformation associated with the summit eruption of Kilauea Volcano, Hawai'i
Nicole Richter: Department of Earth Observation, Friedrich-Schiller-University, Jena, Germany; Michael P Poland: Hawaiian Volcano Observatory, U.S. Geological Survey, Hawai'i National Park, Hawaii, USA; Paul R Lundgren: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA.
4. Italian all-sky imager tracks auroral red arcs over Europe
During geomagnetic storms, stable auroral red (SAR) arcs reach down from polar
latitudes, their faint glow stretching equatorward of the traditional auroral oval.
Invisible to the naked eye, SAR arcs are an upper atmospheric occurrence
produced by the emission of light from oxygen atoms in the thermosphere. The
excitation of the ionospheric oxygen that produces SAR arcs is caused, in turn, by
the conduction of heat from the magnetospheric ring current. Advances in camera
optics, including more sensitive sensors and highly specific filters, have allowed
researchers to track the occurrence of SAR arcs, opening a window into the
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American Geophysical Union