Detailed Information

Solar Activity

Solar activity for October 23, 2026 04:00 UT - October 24, 2026 03:59 UT was eruptive.
Solar activity for October 24, 2026 04:00 UT - October 25, 2026 03:59 UT was eruptive.
Solar activity for October 25, 2026 04:00 UT - October 26, 2026 03:59 UT was eruptive.

Two C-class flares were observed, with no M-class or X-class flares recorded. The maximum flare was a C1.5 originating from NOAA 14560, peaking at 19:42 UT. Associated with this activity, five Type III solar radio bursts were detected; however, no Type II or Type IV radio bursts were reported. Two coronal mass ejections were observed, with one CME on the west limb moving at 305 km/s with an angular width of 44 degrees. Another CME on the east limb had a velocity of 151 km/s and an angular width of 32 degrees.

On the visible disk, one active region was identified by SDO/HMI, designated as NOAA 14560. No BBSO H-Alpha plages were observed. Looking ahead, two active regions are due to return to the visible disk between 26 October and 28 October. Based on today's condition, solar activity for the next 24 hours is predicted to be eruptive.

Geomagnetic Activity

The geomagnetic activity was at active level on October 23th, 2026 04:00 UT - October 24th, 2026 03.59 UT.
The geomagnetic activity was at quiet  level on October 24th, 2026 04:00 UT - October 25th, 2026 03.59 UT.
The geomagnetic activity was on quiet level for the last 24 hours.

The solar wind speed decrease from 419 km/s to 338 km/s, north-south component of interplanetary magnetic field fluctuate between -4.0 nT and 2.4 nT. Corona hole at was not geoeffective. CME on 25 October 2026 18:48 UT was mainly errupted toward west with speed of 305 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 on October 23rd, 04:00 UT - October 24th, 03:59 UT.
Ionosphere was in Quiet level on October 24th, 04:00 UT - October 25th, 03:59 UT.
Ionosphere was in Quiet level on October 25th, 04:00 UT - October 26th, 03:59 UT.

There was depression of foF2 lower than 30% of its median values for 15 minutes on October 25th-26th.There was increment of fmin more than 30% of its median values for 90 minutes and 45 minutes on October 23rd-24th and October 25th-26th. The Spread-F occured for 345 minutes, 270 minutes, and 150 minutes for 3 consecutive days. The Sporadic E layer occured in the night and daytime for 735 minutes, 705 minutes, and 645 minutes on October 23rd-24th, October 24th-25th, and October 25th-26th with foEs value exceeded the foF2 for 75 minutes, 75 minutes, and 45 minutes for 3 consecutive days. The S4 index values (condition of ionospheric scintillation) was on Moderate (S4 < 0.8) level on October 23rd-24th, and on Quiet (S4 < 0.5) level on October 24th-26th 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 23rd, 04:00 UT - October 24th, 03:59 UT, the error of the single frequency GPS positioning was on Slight level.
On October 24th, 04:00 UT - October 25th, 03:59 UT, the error of the single frequency GPS positioning was on Normal level.
On October 25th, 04:00 UT - October 26th, 03:59 UT, the error of the single frequency GPS positioning was on Normal level.

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

HF Radio Communication

On October 23rd, 04:00 UT - October 24th, 03:59 UT, The MUF(Maximum Usable Frequency) depression was in Quiet condition and the SWF (Short Wave Fadeout) was in Moderate.
On October 24th, 04:00 UT - October 25th, 03:59 UT, The MUF(Maximum Usable Frequency) depression was in Quiet condition and the SWF (Short Wave Fadeout) was in Quiet.
On October 25th, 04:00 UT - October 26th, 03:59 UT, The MUF(Maximum Usable Frequency) depression was in Quiet condition and the SWF (Short Wave Fadeout) was in Moderate.

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 at high level on October 23th, 2026 04:00 UT - October 24th, 2026 03:59 UT.
The electron flux was at high level on October 24th, 2026 04:00 UT - October 25th, 2026 03:59 UT.
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 flux of high-energy protons was quiet condition for October 23, 2026 04:00 UT - October 24, 2026 03:59 UT.
The flux of high-energy protons was quiet condition for October 24, 2026 04:00 UT - October 25, 2026  03:59 UT.
The flux of high-energy protons was quiet condition for October 25, 2026 04:00 UT - October 26, 2026 03:59 UT.

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