Detailed Information

Solar Activity

Solar activity over the past 24 hours was eruptive. Three C-class solar flares were observed, with no M-class or X-class flares. The most significant event was a C1.2 flare from NOAA 14503, peaking at 11:58 UT. Associated with this activity, one Type III solar radio burst was detected, while no Type II or Type IV solar radio bursts were observed. No coronal mass ejections were observed.

On the visible disk, seven active regions were present according to SDO/HMI observations, identified as NOAA 14496, NOAA 14498, NOAA 14499, NOAA 14500, NOAA 14501, NOAA 14502, and NOAA 14503. Meanwhile, no H-alpha plages were observed. One farside active region is due to return between 05 August and 07 August. Looking ahead, solar activity is predicted to remain eruptive for the next 24 hours, with the Random Forest model predicting a maximum flare class of C.

Geomagnetic Activity

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

The solar wind speed stable around 244 km/s, north-south component of interplanetary magnetic field stable around -3.6 nT. Coronal holes at eastern equator and north-east were not geoeffective. There was no CME detected in the last 24 hours.

Quiet 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 increment of fmin more than 30% of its median value for 60 minutes 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 1215 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 Moderate 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 expected to continue for the next 24 hours.