Detailed Information

Solar Activity

The Solar activity was at active level on 19 June 2026 07UT - 20 June 2026 07UT.
The Solar activity was at active level on 20 June 2026 07UT - 21 June 2026 07UT.
The Solar activity was at active level on 21 June 2026 07UT - 22 June 2026 07UT.

Solar activity was active in the last 24 hours.
There were three C-class flares and one M-class flare detected with the most significant event was an M6.8 flare from NOAA 14473, peaking at 19:29UT. One solar radio burst was detected, specifically a Type III burst and five coronal mass ejections were reported, with those propagating to the west having a median speed of 492 km/s and an angular width of 38 degrees, and those propagating to the east having a median speed of 257 km/s and an angular width of 18 degrees. On the visible disk, SDO/HMI observations identified three active regions: NOAA 14470, NOAA 14472, and NOAA 14473. BBSO H-Alpha data indicated three plages, corresponding to NOAA 14468, NOAA 14469, and NOAA 14471. Furthermore, two active regions are expected to appear from the farside between 22 June and 24 June. 

Solar activity is predicted to remain active for the next 24 hours.

Geomagnetic Activity

The geomagnetic activity was at quiet level on 19 June 2026 07UT - 20 June 2026 07UT.
The geomagnetic activity was at quiet level on 20 June 2026 07UT - 21 June 2026 07UT.
The geomagnetic activity was on quiet level for the last 24 hours.

The solar wind speed decrease from 450 km/s to 348 km/s, north-south component of interplanetary magnetic field stable around 0.3 nT There was geoeffective coronal hole at central equator, while the others at eastern equator and north-east were not geoeffective. CME on 21 June 2026 08:12 UT was mainly errupted toward south-west with speed of 318 km/s and angular width of 26°. 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

Ionosfer was in minor conditions on 19 June 04:00 UT – 20 June 03:59 UT.
Ionosfer was in quite conditions on 20 June 04:00 UT – 21 June 03:59 UT.
Ionosfer was in moderate conditions on 21 June 04:00 UT – 22 June 03:59 UT.
There was depression of foF2 lower than 30% of its median value for 75 and 150 minutes in 19-22 June 2026. There was an increment of fmin more than 30% of its median values for 45, 105 and 45 minutes in 19-22 June 2026. The Spread-F was occurred for 165 in 19-20 June 2026. The Sporadic-E did occurred in the night and daytime with foEs value exceeding the foF2 value for 1110, 1020 and 1200 minutes in 19-22 June 2026. The S4 index values (condition of ionospheric scintillation) was S4 < 0.5 (quite) in 19-22 June 2026. The TEC were less than 120 in the last three days. Both are observed over Pontianak.
The ionosphere activity in the next 24 hours is predicted to be quite.

Navigation

Based on TEC, the error of the single-frequency GPS positioning on 19 June 04:00 UT – 20 June 03:59 UT was at a normal level.
Based on TEC, the error of the single-frequency GPS positioning on 20 June 04:00 UT – 21 June 03:59 UT was at a normal level.
Based on TEC, the error of the single-frequency GPS positioning on 21 June 04:00 UT – 22 June 03:59UT was at a normal level.
Based on ionospheric scintillation and TEC variation, the probability of error positioning in the next 24 hours is predicted at a normal level.

HF Radio Communication

MUF depression was in moderate condition and Short Wave Fadeout (SWF) was in moderate level on 19 June 04:00 UT – 20 June 03:59 UT.
MUF depression was in quite condition and Short Wave Fadeout (SWF) was in moderate level 20 June 04:00 UT – 21 June 03:59 UT.
MUF depression was in strong condition and Short Wave Fadeout (SWF) was in moderate level on 21 June 04:00 UT – 22 June 03:59 UT.
The MUF depression in the next 24 hours is predicted on a quite level, due to previous of geomagnetic activity.
The SWF for the next 24 hours is predicted at a minor level due to the prediction of the solar

Satellites

The electron flux was at low level on 19 June 2026 07UT - 20 June 2026 07UT.
The electron flux was at low level on 20 June 2026 07UT - 21 June 2026 07UT.
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 proton flux was at quiet level on 19 June 2026 07UT - 20 June 2026 07UT.
The proton flux was at quiet level on 20 June 2026 07UT - 21 June 2026 07UT.
The proton flux was on quiet level on  21 June 2026 07UT - 22 June 2026 07UT.

The 10 MeV proton flux is predicted to remain quiet for the next 24 hours.