Detailed Information

Solar Activity

Solar activity was eruptive in the last 24 hours.

There were 5 flares with all of them are C-class flares in the last 24 hours. The maximum flare class was C8.8 from NOAA4355 peaked at 13:39UT. There was no solar radioburst occured in the last 24 hours. There was 8 CME event in the last 24 hours. The east-directed CME has the highest median velocity of 1025 km/s with an angular width of 22 degrees and the west-directed CME has the highest median velocity of 1334 km/s with an angular width of 10 degrees. The latest SDO/HMI Intensitygram data shows 9 active regions (NOAA4341,4342,4345,4347,4349,4351,4353,4355,4356) and the latest BBSO H-Alpha data shows 4 H-Alpha plages (NOAA4346,4350,4352,4354). Based on farside data shows 1 Regions Due to Return 27 Jan to 29 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 active level for the last 24 hours.

The solar wind speed decrease from 645 km/s to 456 km/s, north-south component of interplanetary magnetic field fluctuate between -5.5 nT and 6.0 nT. There was geoeffective coronal hole at central equator. CME on 26 January 2026 16:00 UT was mainly erupted toward west with speed of 1334 km/s and angular width of 10°. 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 activity cannot be evaluated due to no data 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 values (condition of ionospheric scintillation) were less than 0.5 in the last 24 hours so the scintillation was on quiet level. The maximum TEC index value over Pontianak were at 82.62 (quiet).

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

Navigation

Based on TEC and scintillation, the error of the single-frequency GPS positioning for the last 24 hours was at a normal level.

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) were not evaluated due to no data for the last 24 hours.

The MUF depression for the next 24 hours is predicted on a minor level, due to previous geomagnetic activity.

The SWF for the next 24 hours is predicted at a quiet level due to the prediction of a 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.

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

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