Statistical Study of False Alarms of Geomagnetic Storms (CROSBI ID 603288)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Leer, Kristoffer ; Vennerstrom, Susanne ; Veronig, Astrid ; Rodriguez, Luciano ; Vršnak, Bojan ; Dumbović, Mateja
engleski
Statistical Study of False Alarms of Geomagnetic Storms
Coronal Mass Ejections (CMEs) are known to cause geomagnetic storms on Earth. However, not all CMEs will trigger geomagnetic storms, even if they are heading towards the Earth. In this study, front side halo CMEs with speed larger than 500 km/s have been identified from the SOHO LASCO catalogue. A subset of these halo CMEs did not cause a geomagnetic storm the following four days and have therefore been considered as false alarms. The properties of these events are investigated and discussed here. Their statistics are compared to the geo‐effective CMEs. The ability to identify potential false alarms is considered as an important factor when forecasting geomagnetic storms. It would therefore be very helpful if there were a signature in the solar data that could indicate that a CME is a false alarm. The strength and position of associated flares have been considered as possible candidates for false alarm signature.
space weather ; coronal mass ejections ; geomagnetic storms
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Podaci o prilogu
2013.
objavljeno
Podaci o matičnoj publikaciji
Podaci o skupu
10th European Space Weather Week
predavanje
18.11.2013-22.11.2013
Antwerpen, Belgija