The Geophysical Institute published a multiweek aurora forecast based on predicted Kp index values. The forecast maps a long sequence of three hourly and daily Kp predictions across spring into later months. The institute’s data shows a prevailing pattern of low to moderate geomagnetic activity interrupted by distinct peaks.
Most predicted values cluster between Kp 1 and Kp 4. These lower values appear frequently across the available forecast entries. They form the baseline of the forecast and underline mostly quiet geomagnetic conditions for large parts of the period reported by the institute.
The forecast also records multiple elevated intervals. Several three hour blocks register Kp values at or above 5, including a short sequence where an early slot reaches Kp 5.67 before declining through the day to near Kp 2.7. Across the extended dataset the highest predicted values top out above Kp 7 in isolated entries. The institute’s records list multiple days with Kp readings of 5, 6 and occasional values exceeding 6.
What The Forecast Means For Observers And Operations
The Geophysical Institute’s pattern of intermittent Kp elevation points to recurring windows of stronger geomagnetic activity. The forecast highlights clustered days with Kp 4 to 5 and several isolated spikes above Kp 6. These peaks are spaced among longer runs of lower Kp numbers, creating an irregular but repeatable pattern of activity.
For those tracking short term changes, the institute provides three hourly resolution for specific multi-day stretches showing Kp swings within single 24 hour periods. That detail emphasizes how activity can rise and fall rapidly inside a day. Forecast users should expect brief intervals of higher Kp interspersed with quieter stretches, according to the institute data.
The institute’s archive further shows that elevated Kp intervals are not limited to one season. The dataset contains repeated entries of Kp 5 or greater across the forecast window, and several isolated predictions that exceed Kp 6. Observers and planners referenced to the Geophysical Institute’s predictions should therefore expect occasional, short lived increases in geomagnetic activity during the covered period.
