Detailed Information

Solar Activity

Solar activity over the past 24 hours was eruptive.

A total of three C-class flares were observed, with no M-class or X-class flares. The most significant event was a C2.1 flare from NOAA 14560, peaking at 22:52 UT. No solar radio bursts and CMEs were reported in association with this activity. On the visible disk, three active regions were identified by SDO/HMI: NOAA 14551, NOAA 14557, and NOAA 14560. Additionally, four H-alpha plages were observed by BBSO, corresponding to NOAA 14553, NOAA 14554, NOAA 14556, and NOAA 14559. Looking beyond the visible disk, no farside region is expected to return to the visible disk between 22 October and 24 October.

For the next 24 hours, solar activity is predicted to be a major flare.

Geomagnetic Activity

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

The solar wind speed increase from 318 km/s and 439 km/s, north-south component of interplanetary magnetic field fluctuate between -9.9 nT and 7.0 nT Corona hole at was not geoeffective. CME on 21 October 2026 13:36 UT was mainly errupted toward north-west with speed of 224 km/s and angular width of 12°. The CME was geoeffective and is likely to have not impact on next 24 hours.

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

 

Ionospheric Activity

Ionosphere was in Quiet level for the last 24 hours.

There was no depression of foF2 lower than 30% of its median values.There was increment of fmin more than 30% of its median values for 75 minutes. The Spread-F occured for 30 minutes. The Sporadic E layer occured in the night and daytime for 765 minutes with foEs value exceeded the foF2 for 210 minutes. The S4 index values (condition of ionospheric scintillation) was on quiet level (S4 < 0.5) last 24 hours over Agam. The TEC values was on Quiet (VTEC < 125) level for last 24 hours over Agam.

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 for the last 24 hours.

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 Strong  level due to the prediction of solar flare.

Satellites

The electron flux was on low level level for the last 24 hours.

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

 

Proton flux levels were quiet over the past 24 hours.

These quiet conditions are predicted to continue for the next 24 hours.