Detailed Information

Solar Activity

Solar activity over the past 24 hours was eruptive, characterized by two C-class flares. No M-class or X-class flares were observed. The most significant event was a C1.1 flare originating from NOAA 14384, peaking at 20:06 UT. Associated with this activity, no solar radio bursts were observed. Furthermore, no coronal mass ejections were observed.

On the visible disk, nine active regions were identified by SDO/HMI, including NOAA 14381, NOAA 14384, NOAA 14387, NOAA 14388, NOAA 14389, NOAA 14390, NOAA 14391, NOAA 14392, and NOAA 14393. Additionally, one BBSO H-Alpha plage, NOAA 14385, was observed. No farside regions were observed returning to the visible disk. Looking ahead, the solar activity is predicted to be active for the next 24 hours, with the Random Forest model predicting a maximum flare class of M.

Geomagnetic Activity

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

The solar wind speed decrease from 572 km/s to 389 km/s, north-south component of interplanetary magnetic field stable around -1.9 nT Coronal holes at eastern equator, north-west and south-east were not geoeffective.

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

Ionospheric Activity

The ionosphere was on quiet level for the last 24 hours.

There was no a depression of foF2 lower than 30% of its median value. There was an increment of fmin more than 30% of its median values for 75 minutes. There was a Spread-F layer for 210 minutes and the Sporadic-E for 405 minutes in the night and daytime with foEs value exceeding the foF2 value. The S4 index values (condition of ionospheric scintillation) was on quiet level (S4<0.5) on the last 24 hours over Pontianak. TEC index was on quiet level (VTEC<125) on the last 24 hours over Pontianak.

The ionosphere activity on on the next 24 hours is predicted to be quiet level.

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 in 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 on the next 24 hours is predicted in quiet level based on Geomagnetic activity.

The SWF for the next 24 hours is predicted in minor level due to the prediction of the 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 remained quiet over the past 24 hours. This quiet condition is predicted to continue for the next 24 hours.