Detailed Information

Solar Activity

Solar activity was Eruptive in the last 24 hours.

There were 3 flares with all of them are C-class flares in the last 24 hours. The maximum flare class was C2.0 from UNKNOWN REGION peaked at 23:35UT.
There was no solar radioburst occured in the last 24 hours.
There was 3 CME event in the last 24 hours. The east-directed CME has the highest median velocity of 519 km/s with an angular width of 6 degrees and the west-directed CME has the highest median velocity of 974 km/s with an angular width of 6 degrees.
The latest SDO/HMI Intensitygram data shows 5 active regions (NOAA4305,4307,4308,4310,4311) and the latest BBSO H-Alpha data shows 2 H-Alpha plages (NOAA4303,4309).
Based on farside data shows 2 Regions Due to Return 18 Dec to 20 Dec 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 quiet level for the last 24 hours.

The solar wind speed increase from 454 km/s and 660 km/s, north-south component of interplanetary magnetic field fluctuate between -6.4 nT and 12.4 nT. There were geoeffective coronal holes at north-west to south pole, while the others at eastern equator and south-east were not geoeffective. CME on 17 December 2025 13:36 UT was mainly errupted toward north-west with speed of 212 km/s and angular width of 34°. The CME was not geoeffective and is likely to have not impact on next 24 hours.

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

Ionospheric Activity

Ionospheric conditions over the past 24 hours cannot be evaluated.

Ionospheric activity over the past 24 hours, related to foF2, fmin, Spread-F, and E-Sporadic values, could not be evaluated due to constraints at the observation station. In the past 24 hours, the ionospheric scintillation index (S4) over Pontianak was <0.5, and the maximum TEC value was 70.77, both observed over Pontianak.

Ionospheric activity for the next 24 hours is predicted to be quiet.
 

Navigation

Positioning errors using single-frequency GPS over the past 24 hours are at normal levels, based on variations in ionospheric scintillation and TEC.

Positioning error probabilities for the next 24 hours are predicted to be at normal levels, based on variations in ionospheric scintillation and TEC.

HF Radio Communication

In the last 24 hours, the Maximum Usable Frequency (MUF) Depression and Short Wave Fadeout (SWF) could not be evaluated.

The MUF Depression for the next 24 hours is predicted to be at a quiet level, based on past geomagnetic activity.

The SWF for the next 24 hours is forecasted to be quiet, based on predicted solar flare classes.

Satellites

The electron flux was on high level for the last 24 hours.
Low level of elektron flux is expected for the next 24 hours.
 

The flux of high-energy protons was quiet proton event for the last 24 hours.

Based on today's conditions, the high-energy proton flux is predicted to be quiet over the next 24 hours.