Detailed Information

Solar Activity

Solar activity over the past 24 hours was eruptive.

One C-class flare was observed, peaking as a C1.6 from NOAA 14502 at 06:22 UT. No M-class or X-class flares were observed. Associated with this activity, no solar radio bursts were observed. One coronal mass ejection was detected, originating from the east limb with an estimated speed of 290 kilometres per second and an angular width of 10 degrees. On the visible disk, six active regions were identified by SDO/HMI: NOAA 14498, NOAA 14499, NOAA 14500, NOAA 14501, NOAA 14502, and NOAA 14503. Meanwhile, no H-alpha plages were observed by BBSO. Looking ahead, one farside region is due to return to the visible disk between 06 August and 08 August. For the next 24 hours, solar activity is predicted to remain eruptive, with the Random Forest model predicting a maximum flare class of C.

 

Geomagnetic Activity

The geomagnetic activity was at a quiet level for the last 24 hours.
The solar wind speed was stable at around 240 km/s; the north-south component of the interplanetary magnetic field fluctuated between -9.5 nT and 5.7 nT. Coronal holes at the northeast and eastern equator were not geoeffective.
Quiet level geomagnetic activity is expected for the next 24 hours.

 

 

 

 

Ionospheric Activity

The ionosphere was at a quiet level for the last 24 hours.

There was 15 minutes depression of foF2 lower than 30% of its median value. There was 15 minutes increment of fmin more than 30% of its median value. The Spread-F was not detected for the last 24 hours. There were 12 hours and 15 minutes of Sporadic-E that occurred in the night and daytime, with foEs values exceeding foF2 several times. The S4 index values (condition of ionospheric scintillation ) were less than 0.5, and the maximum TEC index value was 61.88, 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 at a normal level, based on ionospheric scintillation and TEC variation.

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

HF Radio Communication

MUF depression was at a quiet level, and Short Wave Fadeout (SWF) was at a quiet level for the last 24 hours.

The MUF depression for the next 24 hours is predicted at a quiet level, due to the 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 has been at a low level for the last 24 hours.
A 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.