Abstract
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
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
| Original language | English |
|---|---|
| Publication date | 2013 |
| Number of pages | 1 |
| Publication status | Published - 2013 |
| Event | 10th European Space Weather Week - Antwerp, Belgium Duration: 18 Nov 2013 → 22 Nov 2013 Conference number: 10 |
Conference
| Conference | 10th European Space Weather Week |
|---|---|
| Number | 10 |
| Country/Territory | Belgium |
| City | Antwerp |
| Period | 18/11/2013 → 22/11/2013 |
Bibliographical note
Talk at conferenceThis work has received funding from the European Commission FP7 Project COMESEP (263252).