Detailed Information

Solar Activity

Solar activity was eruptive for 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 C1.5 from UNKNOWN REGION peaked at 22:45 UT. There were 1 solar radioburst all of which are type-III occurred 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 305 km/s with an angular width of 84 degrees and the west-directed CME has the highest median velocity of 1420 km/s with an angular width of 20 degrees. The latest SDO/HMI Intensitygram data shows 9 active regions (NOAA 4349, 4351, 4353, 4357, 4358, 4359, 4360, 4362, and 4363) and the latest BBSO H-Alpha data shows 5 H-Alpha plages (NOAA 4350, 4354, 4355, 4356, and 4361). Based on farside data shows 1 regions due to return 30 Jan to 01 Feb from the east limb of the Solar disk.

Based on today's condition, solar activity for :
January 30th, 2026 04:00 UT - January 31st, 2026 03:59 UT is predicted to be eruptive.
January 31st, 2026 04:00 UT - February 1st, 2026 03:59 UT is predicted to be eruptive.
February 1st, 2026 04:00 UT - February 2nd, 2026 03:59 UT 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 768 km/s to 449 km/s, north-south component of interplanetary magnetic field fluctuate between -12.2 nT and 11.7 nT. There was geoeffective coronal hole at western equator, while the others at south-east and eastern equator were not geoeffective. CME on 28 January 2026 08:36 UT was mainly errupted toward west with speed of 1186 km/s and angular width of 10°. The CME was geoeffective and is likely to have impact on 31 January 2026.

Active level geomagnetic activity is expected for the next 24 hours.
Quiet level geomagnetic activity is expected for 31 January 2026 04:00UT - 01 February 2026 03:59 UT
Quiet level geomagnetic activity is expected for 01 February 2026 04:00UT - 02 February 2026 03:59 UT

 

Ionospheric Activity

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 values (condition of ionospheric scintillation) was between 0.5 - 0.8 and the maximum TEC index value was at 79.41, both over Pontianak.

The ionosphere activity on January 30th, 2026, 04:00 UT - January 31st, 2026, 03:59 UT is predicted to be minor.  
The ionosphere activity on January 31st, 2026, 04:00 UT - February 1st, 2026, 03:59 UT is predicted to be minor.  
The ionosphere activity on February 1st, 2026, 04:00 UT - February 2nd, 2026, 03:59 UT is predicted to be quiet.

Navigation

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

Based on ionospheric scintilation and TEC variation, the probability of error positioning in January 30th, 2026, 04:00 UT - January 31st, 2026, 03:59 UT is predicted at a normal level.
Based on ionospheric scintilation and TEC variation, the probability of error positioning in January 31st, 2026, 04:00 UT - February 1st, 2026, 03:59 UT is predicted at a normal level.
Based on ionospheric scintilation and TEC variation, the probability of error positioning in February 1st, 2026, 04:00 UT - February 2nd, 2026, 03:59 UT 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 on January 30th, 2026, 04:00 UT - January 31st, 2026, 03:59 UT is predicted on minor level, due to previous of geomagnetic activity.
The MUF depression on January 31st, 2026, 04:00 UT - February 1st, 2026, 03:59 UT is predicted on minor level, due to previous of geomagnetic activity.
The MUF depression on February 1st, 2026, 04:00 UT - February 2nd, 2026, 03:59 UT is predicted on quiet level, due to previous of geomagnetic activity.

The SWF on January 30th, 2026, 04:00 UT - January 31st, 2026, 03:59 UT is predicted in quiet level due to the prediction of solar flare.
The SWF on January 31st, 2026, 04:00 UT - February 1st, 2026, 03:59 UT is predicted in quiet level due to the prediction of solar flare. 
The SWF on February 1st, 2026, 04:00 UT - February 2nd, 2026, 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 31 January 2026 04:00UT - 01 February 2026 03:59 UT
High level of electron flux is expected for 01 February 2026 04:00UT - 02 February 2026 03:59 UT

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

Based on today's conditon, the flux of high energy proton for :
January 30th, 2026 04:00 UT - January 31st, 2026 03:59 UT is predicted to be quiet.
January 31st, 2026 04:00 UT - February 1st, 2026 03:59 UT is predicted to be quiet.
February 1st, 2026 04:00 UT - February 2nd, 2026 03:59 UT is predicted to be quiet.