Detailed Information

Solar Activity

Solar activity over the past 24 hours was Eruptif, characterized by four C-class flares. No M-class or X-class flares were observed.

The maximum flare observed was a C2.6, originating from NOAA 14520 and peaking at 15:16 UT. Associated with this activity, no solar radio bursts of Type II, Type III, or Type IV were observed.

During this period, two coronal mass ejections (CMEs) were detected. No CMEs were observed originating from the western limb; however, one CME was observed from the eastern limb with a speed of 324 km/s and an angular width of 26 degrees. On the visible disk, six active regions were identified by SDO/HMI: NOAA 14513, NOAA 14518, NOAA 14520, NOAA 14521, NOAA 14522, and NOAA 14523. Additionally, two H-alpha plages were observed by BBSO, identified as NOAA 14515 and NOAA 14519. Looking ahead, three farside regions are expected to return to the visible disk between 01 Sep and 03 Sep.

The solar activity for the next 24 hours is predicted to be eruptive, driven by a predicted maximum flare class of M by the Random Forest model.

Geomagnetic Activity

The geomagnetic activity was at quiet level on 31 August 2026 07UT - 01 September 2026 07UT.
The geomagnetic activity was on quiet level for the last 24 hours.


The solar wind speed fluctuate between 392 km/s and 495 km/s, north-south component of interplanetary magnetic field fluctuate between -10.4 nT and 10.6 nT Coronal holes at north-east and eastern equator were not geoeffective.

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

 

Ionospheric Activity

Ionosphere was in Quiet conditions for the last 24 hours.

There was no depression of foF2 lower than 30% of its median value for last 24 hours. There was increment of fmin more than 30% of its median value for 120 minutes for the last 24 hours. There was no The Spread-F occurred For the last 24 hours. There was The Sporadic-E occurred in the night and daytime for 735 minutes with foEs value exceeded the foF2 for last 24 hours.

S4 index values (condition of ionospheric scintillation ) was less than 0.5 over Pontianak is predicted Quite Level

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

 

Navigation

Based on TEC and scintilation , the error of the single frequency GPS positioning for the last 24 hours was in Normal level.

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

HF Radio Communication

MUF depression was in Quiet condition and Short Wave Fadeout (SWF) was in Moderate

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

The SWF on for 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.

This Quiet condition is expected to continue for the next 24 hours.