Detailed Information

Solar Activity

Solar activity was eruptive in the last 24 hours.

There was 1 C-class flare, peaking at C1.5 at 5:19 UT from NOAA 14449. No solar radio bursts were reported. Five coronal mass ejections (CMEs) were detected, with the highest velocity of the western event recorded at 948 km/s with an angular width of 14 degrees, and the highest velocity of the eastern event at 611 km/s with an angular width of 10 degrees. On the visible disk, ten active regions were observed by SDO/HMI, identified as NOAA 14444, NOAA 14446, NOAA 14447, NOAA 14449, NOAA 14452, NOAA 14454, NOAA 14455, NOAA 14457, NOAA 14458, and NOAA 14459. Additionally, five H-alpha plages were identified by BBSO: NOAA 14445, NOAA 14448, NOAA 14450, NOAA 14451, and NOAA 14456. One farside active region is expected to return to the visible disk between 02 June and 04 June. 

Based on today's conditions, solar activity for the next 24 hours is predicted to be active.

 

Geomagnetic Activity

Geomagnetic activity was active last 24 hours.

The solar wind speed decrease from 445 km/s to 387 km/s, north-south component of interplanetary magnetic field fluctuate between -6 nT and 3 nT. There was geoeffective coronal holes at central-equator, while the others at north-pole and south-pole were not geoeffective. CME on 1 June 2026 22:24 UT was erupted toward south-west with speed of 958 km/s and angular width of 16°. The CME was not-geoeffective and is less likely to have an impact within the next 24 hours.

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 45 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 1320 minutes with foEs value exceeded the foF2 for last 24 hours.

S4 index values (condition of ionospheric scintillation ) was less than 0.5 over Pontianak is predicted Quite Level

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 Moderate for the last 24 hours.

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 at low level in 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. 
The 10 MeV proton flux is predicted to remain quiet for the next 24 hours.