4 Conferences false [["minutes", "Minutes"], ["1", "More information about the venue"], ["notes", "Notes"], ["paper", "Paper"], ["poster", "Poster"], ["slides", "Slides"], ["summary", "Summary"]] ICN-UNAM 1482bc95ee34f0461176da21871284c8 3 icrc2007@icrc2007.unam.mx The 30th International Cosmic Ray Conference will be held from July 3, 2007 to July 11, 2007 in Merida, Yucatan, Mexico. True Merida, Mexico

2007-07-03T08:00:00 2007-07-11T19:00:00 2005-09-26T05:04:53 2024-04-12T17:46:55 Mexico/General IGeof-UNAM 40af9343b8bb9d18708b4f0252d5f53c 429 false [["minutes", "Minutes"], ["1", "More information about the venue"], ["notes", "Notes"], ["paper", "Paper"], ["poster", "Poster"], ["slides", "Slides"], ["summary", "Summary"]] SH.1.7 1 Poster center for space sciences and applied research, Chinese academy of sciences 94d8fea823c0b8bafff27c768ceea9bb center for space sciences and applied research, Chinese academy of sciences 94d8fea823c0b8bafff27c768ceea9bb Merida, Mexico

Regency (Hyatt) Absract In this paper an algorithm was introduced to use the ground cosmic ray data in prediction significant geomagnetic storm. The muon measurement data from Nagoya station, Japan, was employed and the characters of cosmic ray evolvement before geomagnetic storm were revealed by analyzing the difference between the data advancing the geomagnetic storm and the quiet days. It was found that fluctuation advancing geomagnetic storm increased due to the approaching of CME because the shock front and strong IMF induced by CME. An index to measure the fluctuation of data, D8(t), was used in the cosmic ray data processing. The result showed that D8(t) always increased monotonously several hours ahead the geomagnetic storm, which hopefully could become useful factor for geomagnetic storm prediction. As it had been admitted that most of the large geomagnetic storms were caused by CMEs accompanying the solar proton events (SPEs), the SPEs were also chosen together with D8(t) in the prediction process. The mentioned algorithm was tested with the relative data of whole year 2001. The result turned out to be encouraging with the accurate rate reach 80% (8 out of 10) and false rate less than 18% (2 out of 11). 1 http://www.icrc2007.unam.mx/ link http://www.icrc2007.unam.mx/ doc http://indico.nucleares.unam.mx/images/word.png word file ppt http://indico.nucleares.unam.mx/images/powerpoint.png powerpoint file pdf http://indico.nucleares.unam.mx/images/pdf_small.png pdf file odt http://indico.nucleares.unam.mx/images/writer.png writer file odp http://indico.nucleares.unam.mx/images/impress.png presentation file ods http://indico.nucleares.unam.mx/images/calc.png spreadsheet file other http://indico.nucleares.unam.mx/images/file_small.png unknown type file link http://indico.nucleares.unam.mx/images/link.png link