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New real-time auroral activity index from geomagnetic measurements

Tiera Laitinen - Finnish Meteorological Institute, Finland; Atte Kapanen - Finnish Meteorological Institute, Finland; Kirsti Kauristie - Finnish Meteorological Institute, Finland; Ari Viljanen - Finnish Meteorological Institute, Finland

Session: R20 and development of services


We have developed a new local geomagnetic index for nowcasting the probability of visible auroras. We used 463 hours of all-sky camera images, which were visually classified as containing bright auroras, only weak auroras or a dark sky. This data was compared statistically against several index candidates describing geomagnetic variations as measured by a co-located magnetometer. After selecting the final formula for the index, we determined its threshold values for three observation sites in Finland. We plan to implement this new auroral index as a public real-time nowcast service.

Approaching deadlines:

Registration opens:

16 July 2020

Abstract submission opens:

16 July 2020

European Space Weather Medals:

6 September 2020

Registration deadline:

25 September 2020

Registration deadline: [extended]

10 October 2020

Abstract submission deadline:

4 September 2020