Detailed Information

Solar Activity

Solar activity in the past 24 hours was active. 

There were three solar flares, including two C-class flares and one M-class flare. The most significant flare was an M4.0 from NOAA 14482, peaking at 14:19 UT. Over the past 24 hours, no solar radio bursts were reported, while five coronal mass ejections (CMEs) were observed. The west-directed CMEs had the highest median velocity of 1819 km/s and an angular width of 26°, while the east-directed CMEs had the highest median velocity of 574 km/s and an angular width of 16°. On the visible Solar disk, three active regions were identified by SDO/HMI: NOAA 14481, NOAA 14482, and NOAA 14485. Additionally, two H-alpha plages were observed by BBSO, identified as NOAA 14483 and NOAA 14484. There are no farside regions currently expected to return.

The solar activity is predicted to remain active for the next 24 hours, with the Random Forest model predicting a maximum M-class flare.

Geomagnetic Activity

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

The solar wind speed decrease from 547 km/s to 377 km/s, north-south component of interplanetary magnetic field fluctuate between -5.3 nT and 3.2 nT There were geoeffective coronal holes at central equator, while the others at eastern equator and north-east were not geoeffective. CME on 07 July 2026 19:00 UT was mainly errupted toward north-west with speed of 1819 km/s and angular width of 26°. The CME was geoeffective and is likely to have not impact on next 24 hours.

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

Ionospheric Activity

Ionosfer was in quiet conditions on 24 hours.

There was no depression in the foF2 of its median value in the last 24 hours. There was an increment in fmin exceeding 30% of its median value for 75 minutes in the last 24 hours. There was a Spread-F Event for 60 minutes in the last 24 hours. Sporadic E-layer during the day and night for 1,320 minutes with foEs values higher than foF2 values in the last 24 hours. The ionospheric scintillation index (S4) above Pontianak was less than 0.5 (quiet) and the maximum TEC value was 59.54 (quiet) 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 slight 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 slight level.

 

 

 

HF Radio Communication

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

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

The SWF for the next 24 hours is predicted at a minor level due to the prediction of a 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 was quiet over the past 24 hours. 
Based on these conditions, the proton flux is predicted to remain quiet for the next 24 hours.