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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 24, issue 9
Ann. Geophys., 24, 2413–2418, 2006
https://doi.org/10.5194/angeo-24-2413-2006
© Author(s) 2006. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Twelfth EISCAT International Workshop

Ann. Geophys., 24, 2413–2418, 2006
https://doi.org/10.5194/angeo-24-2413-2006
© Author(s) 2006. This work is distributed under
the Creative Commons Attribution 3.0 License.

  20 Sep 2006

20 Sep 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. Jordan2 R. A. Jones et al.
  • 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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