SPACE WEATHER INFORMATION AND FORECAST SERVICES

Center for Space Research
The National Research and Innovation Agency
BRIN - Indonesia

2026 Oct 28

Geomagnet

Quiet

Ionosphere

Minor

Forecast

Geomagnet

Quiet

Ionosphere

Quiet

Issued : 2026 October 28 0800 UTC
Forecast Valid For 24 Hours

ESSENTIAL INFORMATION FOR SPACE WEATHER COMMUNITIES

HF Radio Communication

MUF Depression

Shortwave Fadeout / Radio Blackout

NAVIGATION

Error Positioning

SATELLITES

High Energy Proton

High Energy Electron

Detailed Information

Solar Activity

Solar activity over the past 24 hours was Quiet.

During this period, no C-class, M-class, or X-class flares were observed. Consequently, no Type II, Type III, or Type IV solar radio bursts were reported, and no coronal mass ejections were observed. On the visible disk, two active regions, NOAA 14561 and NOAA 14562, were observed by SDO/HMI, while no H-alpha plages were observed by BBSO. Two farside regions are expected to return to the visible disk between 28 October and 30 October.

Looking ahead, solar activity is predicted to remain Quiet for the next 24 hours, with the Random Forest model forecasting no flare activity.

Geomagnetic Activity

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

The solar wind speed decrease from 402 km/s to 314 km/s, north-south component of interplanetary magnetic field fluctuate between -7.6 nT and 8.0 nT Corona hole at was not geoeffective.

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

Ionospheric Activity

Ionosphere was in disturbed on Minor level for the last 24 hours.

There was depression of foF2 lower than 30% of its median values for 30 minutes.There was increment of fmin more than 30% of its median values for 210 minutes. The Spread-F occured for 135 minutes. The Sporadic E layer occured in the night and daytime for 735 minutes with foEs value exceeded the foF2 for 105 minutes. The S4 index values (condition of ionospheric scintillation) was on Moderate (S4 < 0.8) level last 24 hours over Agam. The TEC values was on Quiet (VTEC < 125) level last 24 hours over Agam.

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

Navigation

For the last 24 hours, the error of the single frequency GPS positioning was on Slight level.

The probability of error positioning for the next 24 hours is predicted to be Slight, based on scintillation and TEC variations.

HF Radio Communication

The MUF(Maximum Usable Frequency) depression was in Minor condition and the SWF (Short Wave Fadeout) was in Strong for the last 24 hours.

The MUF depression for the next 24 hours is predicted to be Quiet, based on prediction of geomagnetic activity.

The SWF for the next 24 hours is predicted to be Quiet, based on prediction of Solar activity.

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 conditions are predicted to continue, with the proton flux expected to remain Quiet for the next 24 hours.