Detailed Information

Solar Activity

Solar activity over the past 24 hours was eruptive.

There were three C-class flares with the most significant event was a C2.5 flare from NOAA 14507, which peaked at 23:04 UT. One Type III solar radio bursts were detected and one coronal mass ejections were observed, coming from the west limb exhibiting a speed of 312 km/s and an angular width of 16 degrees. On the visible disk, four active regions were identified by SDO/HMI, specifically NOAA 14503, NOAA 14506, NOAA 14507, and NOAA 14508. BBSO H-alpha observations observed one plage, NOAA 14504. one new region are due to return from Solar east disk within the next 24 hours.

Solar activity is predicted to be quiet.
 

Geomagnetic Activity

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

The solar wind speed stable around 382 km/s, north-south component of interplanetary magnetic field fluctuate between -4.0 nT and 4.6 nT' There was geoeffective coronal hole at western equator, while the others at eastern equator, north pole, north-east, north-west and south-east were not geoeffective. CME on 11 August 2026 16:24 UT was mainly errupted toward south-west with speed of 312 km/s and angular width of 16°. 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

Ionosphere was disturbed on minor level for the last 24 hours.

There was 45 minutes depression of foF2 lower than 30% of its median value. There was no increment of fmin more than 30% of its median values. The Spread-F was detected for 75 minutes for the last 24 hours. There was 15 hours and 45 minutes Sporadic-E occurred in the night and daytime with foEs value exceeded the foF2 for several times. The S4 index values (condition of ionospheric scintillation ) was less than 0.5 and the maximum TEC index value was at 48.15, both over Pontianak.

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

Navigation

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

Based on ionospheric scintilation and TEC variation, the probability of error positioning for the next 24 hours is predicted at a normal level.

HF Radio Communication

MUF depression was in moderate level and Short Wave Fadeout (SWF) was in quiet level for the last 24 hours.

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

The SWF for the 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 was quiet over the past 24 hours. 
These quiet conditions are expected to continue for the next 24 hours.