Detailed Information

Solar Activity

Solar activity was active from 04:00 UT on August 21, 2026, to 03:59 UT on August 22, 2026.
Solar activity was eruptive from 04:00 UT on August 22, 2026, to 03:59 UT on August 23, 2026.
Solar activity was eruptive from 04:00 UT on August 23, 2026, to 03:59 UT on August 24, 2026.

Solar activity over the past 24 hours was eruptive.
There were nine C-class flares with the most significant event was a C4.1 flare from NOAA 14513, which peaked at 06:53 UT. No solar radioburst nor coronal mass ejection was detected in the last 24 hours. On the visible disk, four active regions were identified by SDO/HMI, specifically NOAA 14513, NOAA 14515, NOAA 14516, and NOAA 14517. BBSO H-alpha observations observed two plages, NOAA 14508 and NOAA 14511. No new region is expected to return from Solar east disk within the next 48 hours.

Based on today's condition,
Solar activity is predicted to be eruptive from 04:00 UT on August 24, 2026, to 03:59 UT on August 25, 2026.
Solar activity is predicted to be eruptive from 04:00 UT on August 25, 2026, to 03:59 UT on August 26, 2026.

Geomagnetic Activity

The geomagnetic activity was at quiet level on 21 August 2026 04:00 UT - 22 August 2026 03:59 UT.
The geomagnetic activity was at quiet level on 22 August 2026 04:00 UT - 23 August 2026 03:59 UT.
The geomagnetic activity was at quiet level on 23 August 2026 04:00 UT - 24 August 2026 03:59 UT.

The solar wind speed decrease from 490 km/s to 407 km/s, north-south component of interplanetary magnetic field fluctuate between -3.7 nT and 4.4 nT. There was geoeffective coronal hole at south-west, while the others at south-east, north-west and north-east were not geoeffective.

Quiet level geomagnetic activity is expected for 24 August 2026 04:00 UT - 25 August 2026 03:59 UT.
Quiet level geomagnetic activity is expected for 25 August 2026 04:00 UT - 26 August 2026 03:59 UT.

Ionospheric Activity

Ionosfer was in quiet conditions on 21 August 2026 04:00 UT - 22 August 2026 03:59 UT.

Ionosfer was in quiet conditions on 22 August 2026 04:00 UT - 23 August 2026 03:59 UT.

Ionosfer was in quiet conditions on 23 August 2026 04:00 UT - 24 August 2026 03:59 UT.

There was no depression of foF2 lower than 30% of its median value for the last three days. There was no increment of fmin more than 30% of its median values for the last three days. There was Spread-F layer for 120 minutes on 21 August 2026, 04:00 UT-22 August 2026, 03:59 UT, and for 90 minutes on 22 August 2026, 04:00 UT-23 August 2026, 03:59 UT. There was Sporadic-E minutes in the night and daytime with foEs value exceeding the foF2 value for 1065 minutes, 900 minutes, 1200 minutes for the last 3 days. The S4 index values (condition of ionospheric scintillation) was at moderate level (0.5<S4<0.8) on 21 August 2026, 04:00 UT-23 August 2026, 03:59 UT and at quiet level (S4<0.5) on 23 August 2026, 04:00 UT-24 August 2026, 03:59 UT over Pontianak. TEC index value was at quiet level (VTEC<125) with the value of 63.07 TECU, 14.69 TECU, and 63.16 TECU on the last three days over Pontianak.

The ionosphere activity on 24 August 2026, 04:00 UT - 25 August 2026, 03:59 UT is predicted to be quiet.

The ionosphere activity on 25 August 2026, 04:00 UT - 26 August 2026, 03:59 UT is predicted to be quiet.

Navigation

Based on TEC and scintilation, the error of the single-frequency GPS positioning for 21 August 2026, 04:00 UT-22 August 2026, 03:59 UT was in slight level.

Based on TEC and scintilation, the error of the single-frequency GPS positioning for 22 August 2026, 04:00 UT-23 August 2026, 03:59 UT was in slight level.

Based on TEC and scintilation, the error of the single-frequency GPS positioning for 23 August 2026, 04:00 UT-24 August 2026, 03:59 UT was in normal level.

Based on ionospheric scintilation and TEC variation, the probability of error positioning on 24 August 2026, 04:00 UT – 25 August 2026, 03:59 UT is predicted at a normal level.

Based on ionospheric scintilation and TEC variation, the probability of error positioning on 25 August 2026, 04:00 UT – 26 August 2026, 03:59 UT is predicted at a normal level.

HF Radio Communication

MUF depression was in quiet condition and Short Wave Fadeout (SWF) was in quiet level on 21 August 2026 04:00 UT - 22 August 2026 03:59 UT.

MUF depression was in quiet condition and Short Wave Fadeout (SWF) was in quiet level on 22 August 2026 04:00 UT - 23 August 2026 03:59 UT.

MUF depression was in quiet condition and Short Wave Fadeout (SWF) was in quiet level on 23 August 2026 04:00 UT - 24 August 2026 03:59 UT.

The MUF depression on 24 August 2026, 04:00 UT - 25 August 2026, 03:59 UT is predicted at quiet level due to previous of geomagnetic activity.

The MUF depression on 25 August 2026, 04:00 UT - 26 August 2026, 03:59 UT is predicted at quiet level due to previous of geomagnetic activity.

The SWF on 24 August 2026, 04:00 UT – 25 August 2026, 03:59 UT is predicted at quiet level due to the prediction of solar flare.

The SWF on 25 August 2026, 04:00 UT - 26 August 2026, 03:59 UT is predicted at quiet level due to the prediction of solar flare.

Satellites

The electron flux was at high level on 21 August 2026 04:00 UT - 22 August 2026 03:59 UT.
The electron flux was at high level on 22 August 2026 04:00 UT - 23 August 2026 03:59 UT.
The electron flux was at high level on 23 August 2026 04:00 UT - 24 August 2026 03:59 UT.

High level of electron flux is expected for 24 August 2026 04:00 UT - 25 August 2026 03:59 UT.
High level of electron flux is expected for 25 August 2026 04:00 UT - 26 August 2026 03:59 UT.

Proton flux was an event in progress from 04:00 UT on August 21, 2026, to 03:59 UT on August 22, 2026.
Proton flux was an event in progress from 04:00 UT on August 22, 2026, to 03:59 UT on August 23, 2026.
Proton flux was an event in progress from 04:00 UT on August 23, 2026, to 03:59 UT on August 24, 2026.

Based on today's condition,
Proton flux is predicted to be an event in progress from 04:00 UT on August 24, 2026, to 03:59 UT on August 25, 2026.
Proton flux is predicted to be quiet from 04:00 UT on August 25, 2026, to 03:59 UT on August 26, 2026.