Detailed Information

Solar Activity

Solar activity in the past 24 hours was eruptive. 

There was one C-class flare, C3.4 from NOAA 14524, peaking at 9:08 UT. Over the past 24 hours, one solar radio burst and three CMEs were reported. One CME exhibited a western component with an observed velocity of 186 km/s and an angular width of 34 degrees, while another showed an eastern component with a velocity of 216 km/s and an angular width of 72 degrees. On the visible disk, SDO/HMI identified eight active regions: NOAA 14521, NOAA 14523, NOAA 14524, NOAA 14525, NOAA 14527, NOAA 14528, NOAA 14529, and NOAA 14530. BBSO observed one H-alpha plage, NOAA 14526. Looking at the farside, one active region is due to return between 10 Sep and 12 Sep. 

For the next 24 hours, solar activity is predicted to remain eruptive

Geomagnetic Activity

The geomagnetic activity was on active level for the last 24 hours.
The solar wind speed stable around 495 km/s, north-south component of interplanetary magnetic field fluctuate between -6.5 nT and 4.2 nT. There was geoeffective coronal hole at central equator, while the others at eastern equator, north-west, south-east and north-east were not geoeffective. CME on 09 September 2026 18:00 UT was mainly errupted toward west with speed of 186 km/s and angular width of 34°. 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 on quiet level for the last 24 hours.

There was no depression of foF2 lower than 30% of its median value. There was an increment of fmin more than 30% of its median values for 60 minutes. There was a 60 minutes Spread-F detected for the last 24 hours. There was 825 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 62.22, both over Pontianak.

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

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

The MUF depression for the next 24 hours is predicted on minor 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 high level for the last 24 hours.
High 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.