SAR arc and its relationship to polar substorm

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概要

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• Photometric observations of two events of the SAR arc, occurred on the nights of September 26,1978 (UT) and September 27,1979 (UT), were made from Albany (42.68°N, 73.82°W), New York for both cases and from two ground stations; one at Albany and the other at Plattsburgh (44.69°N, 73.53°W), New York, for the arc of September 27,1979. Observations of the SAR arcs were compared with concurrent ground-based magnetometer observations of the auroral electrojets. Results of the combined observations reveal that : (1) the intensity variation of the arc of September 26,1978 followed closely that of the westward electrojet, with a time lag of 10-20min after the arc reached its peak intensity; (2) there was a striking coincidence of the onset of the arc of September 27,1979 and that of an isolated substorm whose westward electrojet center was located well apart poleward of the arc. The observational results indicate that there is a relationship between the SAR arc which is a phenomenon occurring at the plasmapause and the auroral electrojet which is connected to the plasmasheet through field lines.

• 国立極地研究所の論文

著者

• Okano S

  Planetary Plasma And Atmospheric Research Center Graduate School Of Science Tohoku University

• Kim Jai

  Department Of Atmospheric Science State University Of New York At Albany

• Okano Shoichi

  Upper Atmosphere and Space Research Laboratory, Tohoku University

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• SAR arc and its relationship to polar substorm

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