Detailed Information

Solar Activity

Solar activity was observed to be active over the past 24 hours.

A total of fifteen solar flares were detected, comprising three C-class flares and twelve M-class flares. There were no X-class flares observed. The most significant event was an M8.5 flare originating from NOAA 14478, which peaked at 23:09UT. Associated with this activity, one Type III solar radio burst was observed, with no Type II or Type IV bursts reported. Furthermore, six coronal mass ejections were detected, with events from the western limb exhibiting a median speed of 552 km/s and an angular width of 6 degrees, while eastern limb events showed a median speed of 1589 km/s and an angular width of 6 degrees. On the visible disk, four active regions were identified by SDO/HMI, specifically NOAA 14475, NOAA 14478, NOAA 14479, and NOAA 14480. Additionally, one H-alpha plage, NOAA 14477, was observed by BBSO. Looking at the farside, one active region is due to return between 02 Jul and 04 Jul 2026.

The solar activity for the next 24 hours is predicted to remain at a Major Flare, with the Random Forest model predicting a maximum flare class of X.

Geomagnetic Activity

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

The solar wind speed fluctuates between 412 km/s and 495 km/s, and the north-south component of the interplanetary magnetic field fluctuates between -11.4 nT and 7.9 nT. Coronal holes at the south-east and north-east were not geoeffective. CME on 01 July 2026 23:12 UT was mainly erupted toward the west with a speed of 552 km/s and an angular width of 6°. The CME was geoeffective and is likely to have no impact on the next 24 hours.

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

Ionospheric Activity

The ionosphere was in Quiet conditions for the last 24 hours.

There was no depression of foF2 lower than 30% of its median value for the last 24 hours. There was an increase 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 a Sporadic-E layer that occurred in the night and daytime for 735 minutes with foEs value exceeding the foF2 for the last 24 hours. S4 index values (condition of ionospheric scintillation ) were less than 0.5 over Pontianak, which is predicted to be quite level

 

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

Navigation

Based on TEC variation and scintillation, the error of the single-frequency GPS positioning for the last 24 hours was at a normal level. Based on ionospheric scintillation and TEC variation, the probability of error positioning over the next 24 hours is predicted at a normal level.

HF Radio Communication

MUF depression was in a quiet condition, and Short Wave Fadeout (SWF) was strong for the last 24 hours.

The MUF depression for the next 24 hours is predicted on the Quiet level, due to the previous geomagnetic activity

The SWF for the next 24 hours is predicted at a moderate level due to the prediction of a solar flare.

Satellites

The electron flux was at a low level for the last 24 hours.

A low 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.