Detailed Information

Solar Activity

Solar activity was eruptive on January 30th, 2026, 04.00 UT - January 31st, 2026, 03.59 UT.
Solar activity was active on January 31st, 2026, 04.00 UT - February 1st, 2026, 03.59 UT.
Solar activity was a major flare on February 1st, 2026 04.00 UT - February 2nd, 2026 03.59 UT.

There were 22 flares with 2 C-class flares, 17 M-class flares, and 3 X-class flares in the last 24 hours. The maximum flare class was X8.1 from NOAA 4366, which peaked at 23:57 UT. There was no solar radio burst that occurred in the last 24 hours. There were 8 CME events in the last 24 hours. The east-directed CME has the highest median velocity of 1835 km/s with an angular width of 360 degrees, and the west-directed CME has the highest median velocity of 1642 km/s with an angular width of 24 degrees. The latest SDO/HMI Intensitygram data shows 7 active regions (NOAA4357, 4359, 4362, 4366, 4367, 4368, 4369) and the latest BBSO H-Alpha data shows 8 H-Alpha plages (NOAA 4355, 4356, 4358, 4360, 4361, 4363, 4364, 4365). Farside data shows 1 region due to return from 02 Feb to 04 Feb from the east limb of the solar disk.

Based on today's conditions, solar activity for the next 24 hours is predicted to be active.

Geomagnetic Activity

The geomagnetic activity was at active level on 30 January 2026 04UT - 31 January 2026 04UT.
The geomagnetic activity was at quiet level on 31 January 2026 04UT - 01 February 2026 04UT.
The geomagnetic activity was on quiet level for the last 24 hours.

The solar wind speed decrease from 482 km/s to 362 km/s. The north-south component of interplanetary magnetic field decrease from 2.0 nT to -3.0 nT. Coronal holes at eastern equator, south pole, south-east and north-east were not geoeffective. CME on 01 February 2026 16:24 UT was mainly errupted toward north-west with speed of 1835 km/s and angular width of 360°. The CME was geoeffective and is likely to have impact on next 24 hours.

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

Ionospheric Activity

Ionosphere could not be evaluated due to the unavailability of data between 29 August 2025 and the past 24 hours. 

The S4 index values (condition of ionospheric scintillation ) were below 0.5 (quiet), and TEC were less than 120 (quiet) in the last three days.

The ionosphere activity in the next 24 hours is predicted to be quiet.

 

Navigation

Based on TEC, the error of the single-frequency GPS positioning on 30 January 04:00 UT - 31 January 03:59 UT was at a normal level.

Based on TEC, the error of the single-frequency GPS positioning on 31 January 04:00 UT - 1 February 03:59 UT was at a normal level.

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

Based on ionospheric scintillation and TEC variation, the probability of error positioning in the next 24 hours is predicted at a normal level.

HF Radio Communication

MUF depression and Short Wave Fadeout (SWF) couldn't be evaluated due to the unavailability of data between 30 January 04:00 UT over the past 24 hours.

The MUF depression in the next 24 hours is predicted at a quiet level, due to the previous geomagnetic activity.

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

Satellites

The electron flux was at very high level on 30 January 2026 04UT - 31 January 2026 04UT.
The electron flux was at very high level on 31 January 2026 04UT - 01 February 2026 04UT.
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 on January 30th, 2026, 04.00 UT- January 31st, 2026, 03.59 UT.
The flux of high-energy protons was quiet on January 31st, 202,6 04.00 UT - February 1st, 202,6 03.59 UT.
The flux of high-energy protons was quiet on February 1st, 202,6 04.00 UT - February 2nd, 202,6 03.59 UT.

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