Detailed Information

Solar Activity

Solar activity was a major flare in the last 24 hours.

There were 16 flares with 11 C-class flares, 4 M-class flares, and 1 X-class flare in the last 24 hours. The maximum flare class was X4.2 from unknown region, peaked at 12:13UT. There was 1 solar radioburst, all of which are type-III, that occurred in the last 24 hours. There were 4 CME events in the last 24 hours. The east-directed CME has the highest median velocity of 761 km/s with an angular width of 16 degrees, and the west-directed CME has the highest median velocity of 277 km/s with an angular width of 16 degrees. The latest SDO/HMI Intensitygram data shows 9 active regions (NOAA 4358, 4362, 4366, 4367, 4368, 4369, 4370, 4371, and 4372) and the latest BBSO H-Alpha data shows 4 H-Alpha plages (NOAA 4359, 4360, 4363, and 4365). Based on the Farside data, 1 region is due to return from 05 Feb to 07 Feb from the east limb of the Solar disk.

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

Geomagnetic Activity

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

The solar wind speed increase from 277 km/s and 344 km/s, north-south component of interplanetary magnetic field fluctuate between -4.2 nT and 6.1 nT. There were geoeffective coronal holes at central equator and western equator, while the others at north-east, eastern equator and south-east were not geoeffective. CME on 04 February 2026 19:12 UT was mainly errupted toward north-west with speed of 277 km/s and angular width of 16°. 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 was not evaluated due to no data for the last 24 hours.

The S4 index value (condition of ionospheric scintillation) was quiet (less than 0.5) for the last 24 hours over Pontianak. The TEC index was quiet (less than 120) for the last 24 hours.

The ionosphere activity is predicted to be quiet 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 quiet level, due to previous geomagnetic activity.

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

Satellites

The electron flux was on very 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 condition, the flux of high-energy protons for the next 24 hours is predicted to be quiet.