Detailed Information

Solar Activity

Solar activity was eruptive in the last 24 hours.    

A total of three C-class flares were observed, with no M-class or X-class flares. The most significant event was a C8.7 flare peaking at 23:25 UT from an UNKNOWN REGION. No Type II, Type III, or Type IV solar radio bursts were reported. One coronal mass ejection was detected, originating from the east limb with a speed of 347 km/s and an angular width of 130 degrees.

On the visible disk, seven active regions were identified by SDO/HMI: NOAA 14470, NOAA 14472, NOAA 14473, NOAA 14474, NOAA 14475, NOAA 14476, and NOAA 14477. Additionally, two H-alpha plages were observed by BBSO: NOAA 14468 and NOAA 14471. One farside region is anticipated to return to the visible disk between June 24 and June 26. Looking ahead, the solar activity for the next 24 hours is predicted to remain eruptive, with the Random Forest model forecasting a maximum C-class flare.

Geomagnetic Activity

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

The solar wind speed increase from 322 km/s and 372 km/s, north-south component of interplanetary magnetic field fluctuate between -5.0 nT and 5.8 nT There were geoeffective coronal holes at eastern equator, central equator and north pole, while the others at north-east and eastern equator were not geoeffective.

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 90 minutes increment of fmin more than 30% of its median values. The Spread-F was detected for 120 minutes for the last 24 hours. There was 9 hours and 15 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 64.67, 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 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 quiet 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 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 persist for the next 24 hours.