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 C5.7 flare, peaking at 21:10UT, originating from an unknown region. Associated with the flare activity, two Type III solar radio bursts were reported, while no Type II or Type IV radio bursts were observed.

Three coronal mass ejections were observed. One CME was detected from the eastern limb, exhibiting a speed of 384 km/s and an angular width of 10 degrees. No CMEs were observed originating from the western limb.

On the visible disk, four active regions were identified by SDO/HMI, designated as NOAA 14520, NOAA 14521, NOAA 14522, and NOAA 14523. Additionally, three H-Alpha plages were observed by BBSO, corresponding to NOAA 14515, NOAA 14518, and NOAA 14519. Looking beyond the visible disk, two regions are due to return between 02 September and 04 September. For the next 24 hours, solar activity is predicted to be quiet, with the Random Forest model forecasting no flares.
 

Geomagnetic Activity

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

The solar wind speed decrease from 468 km/s to 390 km/s, north-south component of interplanetary magnetic field fluctuate between -4.4 nT and 4.7 nT Coronal holes at north-east and eastern equator were not geoeffective.

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 150 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 600 minutes with foEs value exceeded the foF2 for last 24 hours. The S4 index values (condition of ionospheric scintillation ) were less than 0.5, and the maximum TEC index value was 66.03, both over Pontianak.

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 strong

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 high level for the last 24 hours.

High level of electron flux is expected for the next 24 hours.

The 10 MeV proton flux remained quiet over the past 24 hours.

Based on these conditions, the proton flux is predicted to remain quiet for the next 24 hours.