Detailed Information

Solar Activity

Solar activity was active over the past 24 hours.

A total of eight solar flares were observed, comprising seven C-class flares and one M-class flare. No X-class flares were observed. The strongest event was an M1.6 flare peaking at 9:03UT from NOAA 14551. No solar radio bursts were reported in association with these flare events. Two coronal mass ejections were observed, with one originating from the west limb at a speed of 416 km/s and an angular width of 54 degrees. No CMEs were observed from the east limb. On the visible disk, three active regions were identified by SDO/HMI: NOAA 14551, NOAA 14557, and NOAA 14560. Additionally, four H-alpha plages were observed by BBSO, identified as NOAA 14553, NOAA 14554, NOAA 14556, and NOAA 14559. Looking to the farside, one active region is expected to return to the visible disk between October 20 and October 22.

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

Geomagnetic Activity

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

The solar wind speed decrease from 540 km/s to 379 km/s, north-south component of interplanetary magnetic field fluctuate between -4.0 nT and 5.4 nT. Corona hole at equator elongated to southern was geoeffective. CME on 19 October 2026 14:48 UT was mainly errupted toward north-west with speed of 279 km/s and angular width of 44°. The CME was geoeffective and is likely to have not impact on next 24 hours.

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

Ionospheric Activity

Ionosphere was in quiet level for the last 24 hours.

There was depression of foF2 lower than 30% of its median values for  15 minutes.There was increment of fmin more than 30% of its median values for  30 minutes. The Spread-F occured  for  375 minutes. The Sporadic E layer occured in the night and daytime  for  585 minutes with foEs value exceeded the foF2  for  60 minutes. The S4 index values (condition of ionospheric scintillation) was on Moderate (S4 < 0.8) level last 24 hours over Agam. The TEC values was on Quiet (VTEC < 125) level last 24 hours over Agam. 

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

Navigation

For the last 24 hours, the error of the single frequency GPS positioning was on slight level. 

The probability of error positioning 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 condition  and the SWF (Short Wave Fadeout) was in minor for the last 24 hours.

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

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

Satellites

The electron flux was on low level for the last 24 hours.

Low level of electron flux is expected for the next 24 hours.

The 10 MeV proton flux remained at quiet levels over the past 24 hours.

Based on current conditions, quiet proton flux levels are predicted to continue for the next 24 hours.