Detailed Information

Solar Activity

Solar activity over the past 24 hours was eruptive, characterized by two C-class flares. No M-class or X-class flares were observed. The largest event was a C1.4 flare originating from NOAA 14498, which peaked at 11:33UT. Associated with this flare activity, no solar radio bursts were observed. Meanwhile, three coronal mass ejections were detected, with a western-directed event exhibiting a speed of 219 km/s and an angular width of 16 degrees, and an eastern-directed event showing a speed of 278 km/s with an angular width of 56 degrees.

On the visible disk, six active regions were identified by SDO/HMI: NOAA 14496, NOAA 14498, NOAA 14499, NOAA 14500, NOAA 14501, and NOAA 14502. No H-alpha plages were observed by BBSO. Looking ahead, one active region is expected to return from the farside between 04 August and 06 August. Solar activity is predicted to be eruptive for the next 24 hours, driven by a maximum flare class of C predicted by the Random Forest model.

Geomagnetic Activity

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

The solar wind speed stable around 354 km/s. The north-south component of interplanetary magnetic field decrease from 13.2 nT to -17.4 nT. Coronal holes at eastern equator and south-east were not geoeffective. CME on 03 August 2026 18:48 UT was mainly errupted toward north-west with speed of 219 km/s and angular width of 16°. The CME was geoeffective and is likely to have not impact on next 24 hours.

Minor Storm level geomagnetic activity is expected for the next 24 hours.

Ionospheric Activity

Ionosfer was in quiet conditions on 24 hours.

There was no depression in the foF2 of its median value in the last 24 hours. There was an increment in fmin exceeding 30% of its median value for 120 minutes in the last 24 hours. There was no a Spread-F Event in the last 24 hours. Sporadic E-layer during the day and night for 840 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 65.98 (quiet) both observed above Pontianak.

The ionosphere activity is predicted to be minor 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 at a minor level, due to previous geomagnetic activity.

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

Satellites

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 10 MeV proton flux remained quiet over the past 24 hours. These quiet conditions are expected to persist for the next 24 hours.