Detailed Information

Solar Activity

Solar activity was Eruptif in the last 24 hours.
There were 9 flares with all of them are C-class flares in the last 24 hours. The maximum flare class was C5.9 from NOAA4325 peaked at 1:32UT.
There was no solar radioburst occured in the last 24 hours.
There was 5 CME event in the last 24 hours. The east-directed CME has the highest median velocity of 1226 km/s with an angular width of 18 degrees and no west-directed CME are observed.
The latest SDO/HMI Intensitygram data shows 9 active regions (NOAA4317,4321,4323,4324,4325,4328,4329,4330,4331) and the latest BBSO H-Alpha data shows 5 H-Alpha plages (NOAA4318,4319,4320,4326,4327).
Based on farside data shows 4 Regions Due to Return 31 Dec to 02 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 Major Flare

Solar activity for 31 Dec at 04:00 UT to 1 jan at 03:59 UT hours is predicted to be Major Flare

Solar activity for 1 Jan at 04:00 UT to 2 Jan at 03:59 UT hours is predicted to be Active

Geomagnetic Activity

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

The solar wind speed stable around 408 km/s. The north-south component of interplanetary magnetic field increase from -6.3 nT to 5.4 nT. There was geoeffective coronal hole at central equator, while the other at south-west were not geoeffective. The CME on 30 December 07:00 UT was mainly errupted toward eastern with speed of 339 km/s and angular width of 92°. The CME was not geoeffective and is likely to have impact until next 2 days.

Quiet level geomagnetic activity is expected for the next 24 hours.
Quiet level geomagnetic activity is expected for 01 January 2026 04UT - 02 January 2026 04UT.

Ionospheric Activity

The ionospheric activity for the last 24 hours cannot be evaluated due to unavailable data observation. In the last 24 hours, the S4 index values (condition of ionospheric scintillation) were lower than 0.5, and the maximum TEC index value was at 82.95, both over Pontianak.

 

The ionosphere activity on for 31 Dec at 04:00 UT to 1 Jan 2026 at 03:59 UT is predicted to be quiet.

 

The ionosphere activity on 1 Jan at 04:00 UT to 2 Jan 2026 at 03:59 UT is predicted to be quiet.

Navigation

Based on TEC variation 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 on 31 Dec at 04:00 UT to 1 Jan 2026 at 03:59 UT is predicted at a Normal level.

 

Based on ionospheric scintilation and TEC variation, the probability of error positioning on 1 Jan at 04:00 UT to 2 Jan 2026 at 03:59 UT is predicted at a normal level.

HF Radio Communication

The MUF depression and Short Wave Fadeout (SWF) for the last 24 hours cannot be evaluated due to unavailable data observation.

 

The MUF depression on 31 Dec at 04:00 UT to 1 Jan 2026 at 03:59 UT is predicted on quiet level, due to previous of geomagnetic activity.

The MUF depression on 1 Jan at 04:00 UT to 2 Jan 2026 at 03:59 UT is predicted on quiet level, due to previous of geomagnetic activity.

 

The SWF on 31 Dec at 04:00 UT to 1 Jan 2026 at 03:59 UT is predicted in Moderate level due to the prediction of solar flare.

 

The SWF on 1 Jan at 04:00 UT to 2 Jan 2026 at 03:59 UT 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.

High level of electron flux is expected for the next 24 hours.
High level of electron flux is expected for 01 January 2026 04UT - 02 January 2026 04UT.

The flux of high-energy protons was quiet for the last 24 hours. Based on today's condition,

 

the flux of high-energy protons for 31 Dec at 04:00 UT to 1 Jan 2026 at 03:59 UT hours is predicted to be quiet

 

the flux of high-energy protons for 1 Jan at 04:00 UT to 2 Jan 2026 at 03:59 UT hours is predicted to be quiet