Detailed Information

Solar Activity

Solar activity was eruptive in the last 24 hours.

There was 1 C-class in the last 24 hours. The maximum flare class was C2.0 from NOAA 4126 peaked at 8:15 UT. There was 1 type-III solar radio burst occurred in the last 24 hours. There were 4 CME events in the last 24 hours. The east-directed CME has the highest median velocity of 1562 km/s with an angular width of 22 degrees and the west-directed CME has the highest median velocity of 493 km/s with an angular width of 32 degrees. The latest SDO/HMI Intensitygram data shows 8 active regions (NOAA 4122, 4123, 4125, 4127, 4128, 4129, 4131, and 4132) and the latest BBSO H-Alpha data shows 3 H-Alpha plages (NOAA 4124, 4130, and 4133). Farside data shows 3 regions due to return from 04 to 06 July from the east limb of the Solar disk.

Based on today's condition,

solar activity for 4 July, 04.00 UT – 5 July, 03.59 UT is predicted to be eruptive.

Solar activity for 5 July, 04.00 UT – 6 July, 03.59 UT is predicted to be eruptive.

Solar activity for 6 July, 04.00 UT – 7 July, 03.59 UT is predicted to be eruptive.

Geomagnetic Activity

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

The solar wind speed stable around 366 km/s, north-south component of interplanetary magnetic field increase from -4.1 nT to 1.3 nT. There were geoeffective coronal holes at south pole and central equator, while the others at north pole and north-west were not geoeffective. CME on 03 July 2025 07:08 UT was Halo II with speed of 456 km/s and angular width of 118°. The CME was geoeffective and is likely to have not impact until next 3 days.

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

Quiet level geomagnetic activity is expected for 05 July 2025 04:00UT - 06 July 2025 03:59UT.

Quiet level geomagnetic activity is expected for 06 July 2025 04:00UT - 07 July 2025 03:59UT.

Ionospheric Activity

The ionosphere condition was on minor level for the last 24 hours.

There was depression of foF2 lower than 30% of its median value for 45 minutes. There was increment of fmin more than 30% of its median values for 30 minutes. The Spread-F did not occurred in the last 24 hours. The Sporadic-E occurred in the night and daytime with foEs value exceeded the foF2 for 360 minutes.The S4 index values (condition of ionospheric scintillation) was in quiet condition with S4 index value was less than 0.5 (S4<0.5)  over Pontianak. The TEC index over Pontianak was at a quiet level (VTEC<125) in the last 24 hours.

The ionosphere activity on 4 July 2025, 04:00 UT - 5 July 2025, 03:59 UT is predicted to be minor.

The ionosphere activity on 5 July 2025, 04:00 UT - 6 July 2025, 03:59 UT is predicted to be minor.

The ionosphere activity on 6 July 2025, 04:00 UT - 7 July 2025, 03:59 UT 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 on 4 July 2025, 04:00 UT - 5 July 2025, 03:59 UT is predicted at a normal level.

Based on ionospheric scintilation and TEC variation, the probability of error positioning on 5 July 2025, 04:00 UT – 6 July 2025, 03:59 UT is predicted at a normal level.

Based on ionospheric scintilation and TEC variation, the probability of error positioning on 6 July 2025, 04:00 UT - 7 July 2025, 03:59 UT is predicted at a normal level.

HF Radio Communication

MUF Depression was in moderate condition and Short Wave Fadeout (SWF) was in minor for the last 24 hours.

The MUF depression on 4 July 2025, 04:00 UT - 5 July 2025, 03:59 UT is predicted at minor level due to previous of geomagnetic activity.

The MUF depression on 5 July 2025, 04:00 UT - 6 July 2025, 03:59 UT is predicted at moderate level due to previous of geomagnetic activity.

The MUF depression on 6 July 2025, 04:00 UT - 7 July 2025, 03:59 UT is predicted at quiet level due to previous of geomagnetic activity.

The SWF on 4 July 2025, 04:00 UT – 5 July 2025, 03:59 UT is predicted at quiet level due to the prediction of solar flare.

The SWF on 5 July 2025, 04:00 UT - 6 July 2025, 03:59 UT is predicted at quiet level due to the prediction of solar flare.

The SWF on 6 July 2025, 04:00 UT - 7 July 2025, 03:59 UT is predicted at quiet level due to the prediction of solar flare.

Satellites

The electron flux was on high level for the last 24 hours.

Low level of elektron flux is expected for the next 24 hours.

Low level of electron flux is expected for 05 July 2025 04:00UT - 06 July 2025 03:59UT.

Low level of electron flux is expected for 06 July 2025 04:00UT - 07 July 2025 03:59UT.

The flux of high-energy protons was quiet for the last 24 hours.

Based on today's condition,

the flux of high energy proton for 4 July, 04.00 UT – 5 July, 03.59 UT is predicted to be quiet.

The flux of high energy proton for 5 July, 04.00 UT – 6 July, 03.59 UT is predicted to be quiet.

The flux of high energy proton for 6 July, 04.00 UT – 7 July, 03.59 UT is predicted to be quiet.