Detailed Information

Solar Activity

The Sun exhibited eruptive activity over the past 24 hours.

Two C-class solar flares were observed, with no M-class or X-class flares detected. The most significant event was a C1.5 flare, peaking at 21:46 UT, which originated from an UNKNOWN REGION. Associated with this activity, no Type II, Type III, or Type IV solar radio bursts were detected. Meanwhile, four coronal mass ejections were observed, with events originating from the west limb exhibiting a median speed of 381 km/s and an angular width of 26 degrees, while those from the east limb showed a median speed of 476 km/s and an angular width of 8 degrees. On the visible disk, SDO/HMI observed two active regions: NOAA 14535 and NOAA 14544. BBSO H-Alpha data indicated three plages: NOAA 14533, NOAA 14539, and NOAA 14542. Looking ahead, one farside region is expected to return to the visible disk between 30 September and 02 October.

The solar activity for the next 24 hours is predicted to remain eruptive, with the Random Forest model forecasting a maximum flare class of C.

Geomagnetic Activity

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

The solar wind speed decreased from 353 km/s to 315 km/s; the north-south component of the interplanetary magnetic field decreased from 1.9 nT to -2.2 nT. Coronal holes at the eastern equator, south-west and north-east were not geoeffective. CME on 29 September 2026 at 06:36 UT was mainly erupted toward the north-west with a speed of 381 km/s and an angular width of 26°. The CME was geoeffective and is likely to have no impact in the next 24 hours.

Quiet-level geomagnetic activity is expected for the next 24 hours.

Ionospheric Activity

The ionosphere was at the Quiet level for the last 24 hours.

There was no depression of foF2 lower than 30% of its median values. There was an increment of fmin greater than 30% of its median values for  15 minutes. The Spread-F occurred for  465 minutes. The Sporadic E layer occurred at night and during the day for  480 minutes, with foEs values exceeding the foF2  for  60 minutes. The S4 index values (condition of ionospheric scintillation) was on Moderate (S4 < 0.8) level for the last 24 hours over Agam. The TEC values was on Quiet (VTEC < 125) level over Agam in the last 24 hours. 

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

Navigation

For the last 24 hours, the error in single-frequency GPS positioning was at the Slight level. 

The probability of positioning error for the next 24 hours is predicted to be Slight, based on scintillation and TEC variations.

HF Radio Communication

The MUF(Maximum Usable Frequency) depression was in Quiet conditions, and the SWF (Short Wave Fadeout) was in Quiet for the last 24 hours.

The MUF depression for the next 24 hours is predicted to be Quiet, based on the prediction of geomagnetic activity.

The SWF for the next 24 hours is predicted to be Quiet, based on the prediction of Solar activity.

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 10 MeV proton flux remained quiet over the past 24 hours.
These quiet conditions are expected to persist, with the 10 MeV proton flux predicted to remain quiet for the next 24 hours.