Detailed Information

Solar Activity

Solar activity for October 9th, 2026, 04:00 UT - October 10th, 2026, 03:59 UT was active.
Solar activity for October 10th, 2026, 04:00 UT - October 11th, 2026, 03:59 UT was active.
Solar activity for October 11th, 2026, 04:00 UT - October 12th, 2026 03:59 UT was eruptive.

One C-class flare was observed, with no M-class or X-class flares. The maximum flare observed was a C1.4 from NOAA 14545, peaking at 21:37 UT. No solar radio bursts of Type II, Type III, or Type IV were reported. One coronal mass ejection was detected, originating from the western limb with a speed of 200 kilometers per second and an angular width of 38 degrees. There were no eastern limb coronal mass ejections observed. On the visible disk, SDO/HMI instruments observed three active regions: NOAA 14535, NOAA 14544, and NOAA 14545. Additionally, two H-alpha plages were identified by BBSO, corresponding to NOAA 14533 and NOAA 14542. No farside active regions were observed returning to the visible disk.

Solar activity for the next 24 hours is predicted to be eruptive, with a maximum C-class flare predicted by the Random Forest model.

Geomagnetic Activity

The geomagnetic activity was at quiet level on 09 October 2026 04:00UT - 10 October 2026 03:59UT.
The geomagnetic activity was at major storm level on 10 October 2026 04:00UT - 11 October 2026 03:59UT.
The geomagnetic activity was at quiet level on 11 October 2026 04:00UT - 12 October 2026 03:59UT.

The solar wind speed decrease from 904 km/s to 373 km/s, north-south component of interplanetary magnetic field stable around 1.1 nT. Corona hole at was not geoeffective. CME on 11 October 2026 09:00 UT was mainly errupted toward west with speed of 372 km/s and angular width of 10°. 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

The ionosphere was disturbed at a moderate level on October 9th, 04:00 UT - October 10th, 03:59 UT.
The ionosphere was disturbed at a minor level on October 10th, 04:00 UT - October 11th, 03:59 UT.
The ionosphere was at the quiet level on October 11th, 04:00 UT - October 12th, 03:59 UT.

There was depression of foF2 lower than 30% of its median values for  150 minutes and 105 minutes on  October 9th-10th and October 10th-11th. There was increment of fmin more than 30% of its median values for  15 minutes on  October 11th-12th. The Spread-F occured  for  45 minutes, 90 minutes, and 300 minutes for 3 consecutive days. The Sporadic E layer occured in the night and daytime  for  765 minutes, 555 minutes, and 630 minutes on  October 9th-10th, October 10th-11th, and October 11th-12th with foEs value exceeded the foF2  for  150 minutes, 45 minutes, and 150 minutes for 3 consecutive days. The S4 index values (condition of ionospheric scintillation) was on quiet (S4 < 0.5) level on October 9th-11th,  and on moderate (S4 < 0.8) level on October 11th-12th  over Agam. The TEC values was on Quiet (VTEC < 125) for 3 consecutive days over Agam. 

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

Navigation

On October 9th, 04:00 UT - October 10th, 03:59 UT, the error of the single-frequency GPS positioning was at the normal level. 
On October 10th, 04:00 UT - October 11th, 03:59 UT, the error of the single-frequency GPS positioning was at the normal level. 
On October 11th, 04:00 UT - October 12th, 03:59 UT, the error of the single-frequency GPS positioning was at the 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

On October 9th, 04:00 UT - October 10th, 03:59 UT, the MUF(Maximum Usable Frequency) depression was in strong condition, and the SWF (Short Wave Fadeout) was quiet.
On October 10th, 04:00 UT - October 11th, 03:59 UT, the MUF(Maximum Usable Frequency) depression was in moderate condition, and the SWF (Short Wave Fadeout) was quiet.
On October 11th, 04:00 UT - October 12th, 03:59 UT, the MUF(Maximum Usable Frequency) depression was in quiet condition, and the SWF (Short Wave Fadeout) was in quiet.

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 predictions of Solar activity.

Satellites

The electron flux was at low level on 09 October 2026 04:00UT - 10 October 2026 03:59UT.
The electron flux was at high level on 10 October 2026 04:00UT - 11 October 2026 03:59UT.
The electron flux was at low level on 11 October 2026 04:00UT - 12 October 2026 03:59UT.

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

The flux of high-energy protons was quiet on October 9th, 2026, 04:00 UT - October 10th, 2026 03.59 UT.
The flux of high-energy protons was quiet on October 10th, 2026, 04:00 UT - October 11th, 2026 03.59 UT.
The flux of high-energy protons was quiet on October 11th, 2026, 04:00 UT - October 12th, 2026 03.59 UT.

This quiet condition is also predicted to continue for the next 24 hours.