Detailed Information

Solar Activity

The Sun exhibited a major flare activity status over the past 24 hours. A total of nine solar flares were observed, comprising seven C-class flares, one M-class flare, and one X-class flare. The most significant event was an X1.0 flare that peaked at 11:28UT from an UNKNOWN REGION. No solar radio bursts of Type II, Type III, or Type IV were reported in association with this activity.

During the same period, ten coronal mass ejections were detected. Those propagating westward had a median speed of 1231 kilometers per second and an angular width of 14 degrees, while those propagating eastward showed a median speed of 456 kilometers per second and an angular width of 26 degrees. On the visible disk, eight active regions were identified by SDO/HMI instrumentation: NOAA 14446, NOAA 14455, NOAA 14457, NOAA 14458, NOAA 14459, NOAA 14460, NOAA 14461, and NOAA 14462. Additionally, BBSO H-Alpha observations revealed six plages: NOAA 14448, NOAA 14449, NOAA 14450, NOAA 14451, NOAA 14454, and NOAA 14456. Looking beyond the visible disk, one farside region is anticipated to return to the Earth-facing disk between 04 Jun and 06 Jun. For the next 24 hours, the solar activity is predicted to maintain a major flare status, with the Random Forest model forecasting a maximum flare class of X.

Geomagnetic Activity

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

The solar wind speed fluctuates between 353 km/s and 426 km/s, north-south component of the interplanetary magnetic field fluctuates between -6.4 nT and 7.3 nT There were geoeffective coronal holes at the central equator and western equator, while the others at the south-east were not geoeffective. CME on 03 June 2026 23:00 UT mainly erupted toward west with a speed of 887 km/s and an angular width of 12°. The CME was geoeffective and is likely to have an impact on the next 24 hours.

Minor storm level geomagnetic activity is expected for the next 24 hours.

Ionospheric Activity

Ionosfer was in quite conditions on 24 hours.

There was no depression in the foF2 in the last 24 hours. There was an increment in fmin exceeding 30% of its median value for 120 minutes in the last 24 hours. There was Spread-F Event for 420 minutes in the last 24 hours. Sporadic E-layer during the day and night for 1065 minutes with foEs values ​​higher than foF2 values ​​in the last 24 hours. The ionospheric scintillation index (S4) above Pontianak, had a value below 0.5 at a quite level and the maximum TEC value was 74.43 both observed above Pontianak.

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

Navigation

The error of the single frequency GPS positioning for the next 24 hours was on normal level, based on ionospheric scintillation and TEC variation.

Based on ionospheric scintillation and TEC variation, the probability of error positioning for the next 24 hours is predicted to be on normal level.

 

HF Radio Communication

In the last 24 hours, the Maximum Usable Frequency (MUF) Depression was at a quite level, and the Short-Wave Fadeout (SWF) was at a moderate level.

The MUF depression for the next 24 hours is predicted at a moderate level, due to previous geomagnetic activity.

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

Based on current conditions, a quiet proton flux environment is expected to persist for the next 24 hours.