Detailed Information

Solar Activity

Solar activity was eruptive in the last 24 hours.    

There were 2 flares with all of them were C-class flares in the last 24 hours. The maximum flare class was C5.2 from NOAA 4336 peaked at 10:15 UT. There was no solar radioburst occured in the last 24 hours. There was 4 CME event in the last 24 hours. The east-directed CME has the highest median velocity of 1041 km/s with an angular width of 6 degrees, and the west-directed CME has the highest median velocity of 240 km/s with an angular width of 8 degrees. The latest SDO/HMI Intensitygram data shows 3 active regions (NOAA 4334, 4336, and 4340) and the latest BBSO H-Alpha data shows 2 H-Alpha plages (NOAA 4338 and 4339). Based on Farside data, 1 Regions Due to Return 13 Jan to 15 Jan from the east limb of the Solar disk.

Based on today's condition, solar activity for the next 24 hours is predicted to be eruptive.

Geomagnetic Activity

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

 

 

The solar wind speed fluctuates between 442 km/s and 690 km/s, north-south component of interplanetary magnetic field fluctuate between -10.6 nT and 5.2 nT There was geoeffective coronal hole at north pole, while the others at eastern equator, south-east and north-east were not geoeffective. CME on 12 January 2026 05:48 UT was Halo II with speed of 223 km/s and angular width of 138°. The CME was geoeffective and is likely to have not impact on next 24 hours.

 

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

Ionospheric Activity

The ionosphere cannot be evaluated for the last 24 hours.

The ionospheric activity for the last 24 hours cannot be evaluated due to problems with the CADI station. The S4 index value (condition of ionospheric scintillation) was lower than 0.5, and the maximum TEC index value was at 49.47, both over Pontianak.

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

Navigation

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

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

HF Radio Communication

MUF depression and Short Wave Fadeout (SWF) cannot be evaluated for the last 24 hours.

The MUF depression for the next 24 hours is predicted to be on minor level, based on previous 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.

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

The flux of high-energy protons was on quiet level for the last 24 hours.

Based on today's condition, the flux of high-energy protons is predicted to be in quiet condition for the next 24 hours.