Abstract
A unusually low aurora was witnessed on March 8 of this year at the Auroral Observatory, Tromsø, Norway. The height was determined photographically by the Director, L. Harang, working with Dr. W. Bauer (of the Photophysical Laboratory, the Danzig Technical High School), who have made a brief joint report of their work in Gerlands Beiträge zur Geophysik (Bd. 37, pp. 109–115, 1932). At the suggestion of E. Briiche, Berlin, two film cameras were in use at the two base stations (43 km. apart) from which simultaneous parallactic photographs were made; this was in order that, by taking short exposures of a few seconds, a continuous record of the development and changes of aurorae might be obtained. On the two evenings of March 8 and 9, 1932, about 500 pairs of photographs of bows, bands, draperies and rays were taken, during intense displays of the northern lights. A series of 20 pairs of these pictures, covering a period of only 75 seconds, on the night of March 8, disclosed a particularly interesting phenomenon.
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CHAPMAN, S. Low Altitude Auroras. Nature 130, 764–765 (1932). https://doi.org/10.1038/130764a0
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DOI: https://doi.org/10.1038/130764a0