Detailed Information

Solar Activity

Solar activity in the past 24 hours was active.

Four solar flares, consisting of three C-class flares and one M-class flare, occurred in the past 24 hours. The strongest was an M3.0 flare that peaked at 19:20 UT from NOAA 14524. Four solar radio bursts, consisting of one type II, two type III, and one type IV, as well as ten CMEs, were recorded during this period. Among the east-directed CMEs, the event with the highest median velocity recorded 688 km/s with an angular width of 142°. Meanwhile, for the west-directed group, the highest median velocity reached 706 km/s with an angular width of 26°. The latest SDO/HMI intensitygram data show six active regions (NOAA 14518, 14520, 14521, 14522, 14523, and 14524), while the latest BBSO H-alpha data show one H-alpha plage (NOAA 14519) on the solar disk. The latest Farside Map from GONG indicates that one new active region is expected to appear on the solar limb in the next 24 hours.

Based on today's conditions, solar activity for the next 24 hours is predicted to be active.

Geomagnetic Activity

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

The solar wind speed fluctuated between 367 km/s and 450 km/s. The north-south component of the interplanetary magnetic field increased from -5.8 nT to 5.1 nT. Coronal holes at the eastern equator and the north were not geoeffective. CME on 02 September 2026 at 19:36 UT was mainly errupted toward the north-east with a speed of 744 km/s and an angular width of 204°. The CME was not 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 conditions on 24 hours.

There was no depression in the foF2 relative to its median value in the last 24 hours. There was an increment in fmin exceeding 30% of its median value for 105 minutes in the last 24 hours. There was a Spread-F Event for 150 minutes in the last 24 hours. Sporadic E-layer during the day and night for 600 minutes, with foEs values higher than foF2 values in the last 24 hours. The ionospheric scintillation index (S4) above Pontianak was less than 0.5 (quiet), and the maximum TEC value was 63.99 (quiet), both observed above Pontianak.

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

Navigation

The error of the single frequency GPS positioning for the next 24 hours was on normal level, based on ionospheric scintillation and TEC variation.

Based on ionospheric scintillation and TEC variation, the probability of error positioning for the next 24 hours is predicted to be on normal level.
 

HF Radio Communication

In the last 24 hours, the Maximum Usable Frequency (MUF) Depression was at a quiet level, and the Short-Wave Fadeout (SWF) was at a moderate level.

The MUF depression for the next 24 hours is predicted to be at a quiet level, due to previous geomagnetic activity.

The SWF for the next 24 hours is predicted to be at a minor level due to the prediction of a solar flare.

Satellites

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

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

The flux of high-energy protons in the past 24 hours was quiet.

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