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Ann. Geophys., 24, 2413-2418, 2006
www.ann-geophys.net/24/2413/2006/
© European Geosciences Union 2006

The solar eruption of 13 May 2005: EISCAT and MERLIN observations of a coronal radio burst

R. A. Jones¹, A. R. Breen¹, R. A. Fallows¹, M. M. Bisi¹, P. Thomasson², G. Wannberg³, and C. A. Jordan^2
1Institute of Mathematical and Physical Sciences, University of Wales, Aberystwyth, UK
²Jodrell Bank Observatory, Manchester University, UK
³EISCAT Scientific Association, Kiruna, Sweden

Abstract. We report results from EISCAT and MERLIN observations of radio scintillation during a solar eruptive event in May 2005. Anomalous increases in signal strength detected at sites more than 2000 km apart are shown to arise from the detection of a strong coronal radio burst in the distant off-axis response of the MERLIN and EISCAT antennas. These observations show that EISCAT is capable of detecting the signatures of explosive events in the solar atmosphere with a high degree of time resolution. We further suggest that the highly time-structured variation in signal strength caused by distant off-axis detection of a powerful coronal radio signal could provide an explanation for previously unexplained anomalies in EISCAT IPS observations, as well as being a potential source of errors in active observations using radar codes with a completion time longer than the time-variation of the coronal signal.

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Citation: Jones, R. A., Breen, A. R., Fallows, R. A., Bisi, M. M., Thomasson, P., Wannberg, G., and Jordan, C. A.: The solar eruption of 13 May 2005: EISCAT and MERLIN observations of a coronal radio burst, Ann. Geophys., 24, 2413-2418, 2006.   Bibtex   EndNote   Reference Manager