This plot shows the mean photospheric excess magnetic energy density (MEANPOT), from SHARP – Space-Weather HMI Active Region Patches. X-flares are possible for MEANPOT > 10000. Credits: SHARP data viewer.

Solar Wind

This shows the latest forecast of conditions in the solar wind, as predicted by the WSA-Enlil model. Credits: SWPC/NOAA.

Dst and Kp Indices

The Dst index is an index of geomagnetic activity. A geomagnetic storm is defined by changes in Dst. The size of a geomagnetic storm is classified as moderate (-50 nT > minimum of Dst < -100 nT), intense (-100 nT > minimum Dst < -250 nT) or super-storm (minimum of Dst > -250 nT). (IRF-Lund)

The Kp index is the global geomagnetic storm index. The Kp-index ranges from 0 to 9, where a value of 0 means very little geomagnetic activity and a value of 9 means an extreme geomagnetic storm. (IRF-Lund)


Short term (1hr) forecast. When Kp > 7 Aurora might be seen at lower latitudes in Sweden. Credits: Geophysical Institute Alaska.

Geomagnetic field variations