Detailed Information

Solar Activity

Solar activity was eruptive over the past 24 hours. Two C-class flares were observed, with no M-class or X-class flares. The strongest event was a C2.4 flare from NOAA 14505, peaking at 13:16 UT. No solar radio bursts were reported. Two coronal mass ejections were detected, with the westernmost event observed at a speed of 573 km/s and an angular width of 16 degrees.

On the visible disk, four active regions were identified by SDO/HMI: NOAA 14503, NOAA 14504, NOAA 14505, and NOAA 14506. In contrast, no H-alpha plages were observed by BBSO. Furthermore, three active regions are expected to emerge from the far side of the Sun between August 11 and August 13. Looking ahead, solar activity is predicted to remain eruptive for the next 24 hours, with the Random Forest model forecasting a maximum flare class of C.

Geomagnetic Activity

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

The solar wind speed decrease from 473 km/s to 308 km/s, north-south component of interplanetary magnetic field stable around 1.4 nT. There were geoeffective coronal holes at central equator, while the others at north pole, eastern equator, north-west and north-east were not geoeffective. CME on 10 August 2026 13:25 UT was mainly errupted toward west with speed of 573 km/s and angular width of 16°. The CME was geoeffective and is likely to have not impact on next 24 hours.

Active level geomagnetic activity is expected for the next 24 hours.

Ionospheric Activity

Ionosphere was in Quiet conditions for the last 24 hours.

There was no depression of foF2 lower than 30% of its median value for last 24 hours. There was no increment of fmin more than 30% of its median value for the last 24 hours. There was no The Spread-F occurred for the last 24 hours. There was The Sporadic-E occurred in the night and daytime for 1365 minutes with foEs value exceeded the foF2 for last 24 hours.

S4 index values (condition of ionospheric scintillation ) was less than 0.5 over Pontianak is predicted Quite Level

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

Navigation

Based on TEC and scintilation , the error of the single frequency GPS positioning for the last 24 hours was in Normal level.

Based on ionospheric scintilation 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 Quiet condition and Short Wave Fadeout (SWF) was in Quiet for the last 24 hours.

The MUF depression for next 24 hours is predicted on Quiet level, due to previous of geomagnetic activity

The SWF on for next 24 hours is predicted in Quiet level due to the prediction of 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 anticipated to continue for the next 24 hours.