Detailed Information

Solar Activity

Solar activity in the past 24 hours was eruptive. 

There was one C-class flare, C1.7, from NOAA 14508, peaking at 7:33 UT. Over the past 24 hours, no solar radio bursts or CMEs were reported. On the visible disk, five active regions were identified by SDO/HMI: NOAA 14503, NOAA 14506, NOAA 14507, NOAA 14508, and NOAA 14509. Additionally, one H-alpha plage, NOAA 14504, was observed by BBSO. Four regions are anticipated to return to the visible disk between August 13 and August 15. 

The solar activity is predicted to remain eruptive for the next 24 hours, with the Random Forest model predicting a maximum C-class flare.

 

Geomagnetic Activity

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

The solar wind speed decrease from 457 km/s to 322 km/s, north-south component of interplanetary magnetic field fluctuate between -8.4 nT and 7.2 nT. There was geoeffective coronal hole at central equator, while the others at north-west, south-east, north pole and north-east were not geoeffective.

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

 

 

Ionospheric Activity

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

There was a 120-minute depression of foF2 lower than 30% of its median value. There was no increment of fmin more than 30% of its median value. There was no Spread-F detected for the last 24 hours. There was 1245 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 49.27, both over Pontianak.

Ionospheric activity over 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 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 at a moderate 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 on quiet level, due to previous 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.