Detailed Information

Solar Activity

Solar activity over the past 24 hours was eruptive.

Six C-class flare was observed, peaking as a C3.4 from NOAA 14528 at 23:39 UT. No M-class or X-class flares were observed. Associated with this activity, seven type III solar radio bursts were observed. One coronal mass ejection was detected, originating from the west limb with an estimated speed of 328 kilometers per second and an angular width of 14 degrees. On the visible disk, eight active regions were identified by SDO/HMI: NOAA 14521, NOAA 14523, NOAA 14524, NOAA 14525, NOAA 14527, NOAA 14528, NOAA 14529, and NOAA 14530. Meanwhile, one H-alpha plages were observed by BBSO (NOAA 14526). Looking ahead, one farside region is due to return to the visible disk between 9 September and 11 September. For the next 24 hours, solar activity is predicted to remain eruptive, with the Random Forest model predicting a maximum flare class of C.

 

Geomagnetic Activity

The geomagnetic activity was on active level for the last 24 hours.

The solar wind speed stable around 465 km/s, north-south component of interplanetary magnetic field decrease from 12.3 nT to -14.1 nT. There was geoeffective coronal hole at western equator, while the others at eastern equator and north pole were not geoeffective. CME on 08 September 2026 18:36 UT was erupted toward north-west with speed of 328 km/s and angular width of 14°. The CME was geoeffective but less likely to have an impact on next 24 hours.

Active level geomagnetic activity is expected for the next 24 hours.

Ionospheric Activity

Ionosphere was on quiet level for the last 24 hours.

There was no depression of foF2 lower than 30% of its median value. There was 270 minutes increment of fmin more than 30% of its median values. The Spread-F was not detected for the last 24 hours. There was 12 hours Sporadic-E occurred in the night and daytime with foEs value exceeded the foF2 for several times. The S4 index values (condition of ionospheric scintillation ) was less than 0.5 and the maximum TEC index value was at 62.56, both over Pontianak.

The ionosphere activity for the next 24 hours is predicted to be minor. 

Navigation

The error of the single frequency GPS positioning for the last 24 hours was in normal level, based on ionospheric scintilation and TEC variation.

Based on ionospheric scintilation and TEC variation, the probability of error positioning for the next 24 hours is predicted at a normal level.

HF Radio Communication

MUF depression was in quiet level and Short Wave Fadeout (SWF) was in strong level for the last 24 hours.

The MUF depression for the next 24 hours is predicted on minor level, due to previous of geomagnetic activity.

The SWF for the next 24 hours is predicted in quiet level due to the prediction of solar flare.

Satellites

The electron flux was on high level for the last 24 hours.
High level of electron flux is expected for the next 24 hours.

The 10 MeV proton flux remained quiet over the past 24 hours. These quiet conditions are expected to persist for the next 24 hours.