Detailed Information

Solar Activity

Solar activity was eruptive in the last 24 hours.

There were 6 C-class flares, with the maximum flare class was C9.6 from the new region peaking at 03:50 UT. There were 1 type III solar radio burst and 5 CME events in the last 24 hours. The east-directed CME has the highest median velocity of 847 km/s with an angular width of 8 degrees and the west-directed CME has the highest median velocity of 1834 km/s with an angular width of 60 degrees. The latest SDO/HMI Intensitygram data shows 3 active regions (NOAA 4334, 4336, and 4340) and the latest BBSO H-Alpha data shows 2 plages (NOAA 4338 and 4339). Based on farside data, 1 active region due to return from the east limb of the Solar disk in the next 24 hours .

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

Geomagnetic Activity

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

The solar wind speed stable around 549 km/s, north-south component of interplanetary magnetic field stable around -2.1 nT There were geoeffective coronal holes at north pole and western equator, while the others at eastern equator were not geoeffective. CME on 13 January 2026 21:12 UT was mainly errupted toward northern with speed of 272 km/s and angular width of 66°. The CME was not 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

Evaluation of Ionosphere conditions cannot be delivered within the last 24 hours.

Evaluation of the foF2 value, the increase in the fmin value, Spread-F, and the Sporadic E-Layer cannot be reported due to problems with the CADI station. The S4 index values (condition of ionospheric scintillation) was quiet (S4 < 0.5) and TEC index was quiet (VTEC<125).

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

Navigation

Based on TEC 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 for next 24 hours is predicted at a normal level.

HF Radio Communication

The Maximum Usable Frequency (MUF) Depression and the Short Wave Fadeout (SWF) cannot be reported within the last 24 hours.

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

The SWF for next 24 hours 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 elektron flux is expected for the next 24 hours.

The flux of high-energy protons was on quiet level for the last 24 hours.
Based on today's condition, the flux of high-energy protons is predicted to be in quiet condition for the next 24 hours.