Detailed Information

Solar Activity

Solar activity for 2 oct, 04:00 UT – 3 oct, 03:59 UT was quiet.
solar activity for 3 oct, 04:00 UT – 4 oct, 03:59 UT was quiet.
solar activity for 4 oct, 04:00 UT – 5 oct, 03:59 UT was quiet.

Solar activity over the past 24 hours was quiet. No C-class flares were observed, and no M-class or X-class flares were observed. Consequently, no solar radio bursts were observed. One Coronal Mass Ejection was detected, originating from the east and exhibiting a speed of 289 km/s with an angular width of 76 degrees.

On the visible disk, four active regions were identified by SDO/HMI: NOAA 14545, NOAA 14546, NOAA 14547, and NOAA 14548. Additionally, one H-Alpha plage, NOAA 14544, was observed by BBSO. Two regions are due to return from the farside between 05 Oct and 07 Oct. Looking ahead, solar activity is predicted to remain quiet for the next 24 hours, with the Random Forest model forecasting no-flare activity.
Proton Flux

Geomagnetic Activity

The geomagnetic activity was at active level on 02 October 2026 04UT - 03 October 2026 04UT.
The geomagnetic activity was at minor storm level on 03 October 2026 04UT - 04 October 2026 04UT.
The geomagnetic activity was on minor storm level for the last 24 hours.

The solar wind speed increase from 267 km/s and 356 km/s, north-south component of interplanetary magnetic field fluctuate between -10.3 nT and 14.7 nT. Corona hole at eastern was not geoeffective and corona hole at western was geoeffective.

Minor storm level geomagnetic activity is expected for the next 24 hours.

Ionospheric Activity

Ionosphere activity for 02 Oktober 2026 04UT - 03 Oktober 2026 04UT was on quiet level.
Ionosphere activity for 03 Oktober 2026 04UT - 04 Oktober 2026 04UT was on quiet level.
Ionosphere activity was on quiet level for the last 24 hours.

There was depression of foF2 lower than 30% of its median value for 15 minutes for the first 48 hours. There was no increment of fmin more than 30% of its median values for the last 72 hours. The Spread-F was detected for 360, 615, and 465 minutes for the last 72 hours. There was 660, 660, and 795 minutes Sporadic-E occurred in the night and daytime with foEs value exceeded the foF2 for several times in the last 72 hours. The S4 index values (condition of ionospheric scintillation ) was less than 0.5 (quiet), . The maximum TEC index value was less than 125 (quiet) for the last 72 hours, both over Pontianak.

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

Navigation

Based on TEC and scintillation,
the error of the single-frequency GPS positioning for 02 Oktober 2026 04UT - 03 Oktober 2026 04UT was at a normal level.
the error of the single-frequency GPS positioning for 03 Oktober 2026 04UT - 04 Oktober 2026 04UT was at a slight level.
the error of the single-frequency GPS positioning for the last 24 hours was at a medium level.

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

HF Radio Communication

MUF depression was in quiet level and Short Wave Fadeout (SWF)  was in quiet level for 02 Oktober 2026 04UT - 03 Oktober 2026 04UT.
MUF depression was in quiet level and Short Wave Fadeout (SWF) was in quiet level for 03 Oktober 2026 04UT - 04 Oktober 2026 04UT.
MUF depression was in quiet level and Short Wave Fadeout (SWF) was in quiet level for the last 24 hours.

The MUF depression for the next 24 hours is predicted on a moderate level, due to previous geomagnetic activity.
The SWF for the next 24 hours is predicted at a quiet level due to the prediction of a solar flare.

Satellites

The electron flux was at low level on 02 October 2026 04UT - 03 October 2026 04UT.
The electron flux was at low level on 03 October 2026 04UT - 04 October 2026 04UT.
The electron flux was on low level for the last 24 hours.

High level of electron flux is expected for the next 24 hours.

The flux of high-energy proton for 2 oct, 04:00 UT – 3 oct, 03:59 UT was quiet.
The flux of high-energy proton for 3 oct, 04:00 UT – 4 oct, 03:59 UT was quiet.
The flux of high-energy proton for 4 oct, 04:00 UT – 5 oct, 03:59 UT was quiet.

Based on these conditions, the proton flux is predicted to remain quiet for the next 24 hours.