Detailed Information

Solar Activity

Solar activity was eruptive for September 12th, 2025, 04.00 UT - September 13th, 2025, 03.59 UT.
Solar activity was eruptive for September 13th, 2025, 04.00 UT - September 14th, 2025, 03.59 UT.
Solar activity was eruptive for September 14th, 2025, 04.00 UT - September 15th, 2025, 03.59 UT.    

There were 9 flares with all of them are C-class flares, in the last 24 hours. The maximum flare class was C3.7 from NOAA 4217 peaked at 15:23 UT. There was 1 solar radioburst, all of which are type-III occurred in the last 24 hours. There were 7 CME events in the last 24 hours. The east-directed CME has the highest median velocity of 1033 km/s with an angular width of 26 degrees, and the west-directed CME has the highest median velocity of 1471 km/s with an angular width of 154 degrees. The latest SDO/HMI Intensitygram data show 5 active regions (NOAA 4211, 4213, 4216, 4217, and 4218), and the latest BBSO H-Alpha data show 1 H-Alpha plage (NOAA 4215). Based on farside data shows 2 regions due to return from 15 Sep to 17 Sep from the east limb of the Solar disk.

Based on today's condition, solar activity for the next 24 hours is predicted to be eruptive.

Geomagnetic Activity

The geomagnetic activity was at a quiet level on 12 September 2025 04:00UT - 13 September 2025 03:59UT.

The geomagnetic activity was at a quiet level on 13 September 2025 04:00UT - 14 September 2025 03:59UT.

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

The solar wind speed increases from 334 km/s and 383 km/s, and the north-south component of the interplanetary magnetic field increases from -4.8 nT to 5.9 nT. There were geoeffective coronal holes at the western equator and south pole, while the others at the north-east and central equator were not geoeffective. CME on 14 September 2025 15:12 UT was Halo II with a speed of 1471 km/s and an angular width of 154°. The CME was geoeffective and is likely to have no impact on the next 24 hours.

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

Ionospheric Activity

Ionosphere activity cannot be evaluated for September 12th, 2025, 04.00 UT - September 13th, 2025, 03.59 UT.
Ionosphere activity cannot be evaluated for September 13th, 2025, 04.00 UT - September 14th, 2025, 03.59 UT.
Ionosphere activity cannot be evaluated for September 14th, 2025, 04.00 UT - September 15th, 2025, 03.59 UT.

The ionospheric activity for the last 3 days cannot be evaluated due to problems with the CADI station. The S4 index values (condition of ionospheric scintillation) were lower than 0.5, and the maximum TEC index value was at 44.39, both over Pontianak.

The ionosphere activity is predicted to be disturbed at a minor level for the next 24 hours.

Navigation

The error of the single frequency GPS positioning for September 12th, 2025, 04.00 UT - September 3rd, 2025, 03.59 UT was at a slight level, based on ionospheric scintillation and TEC variation.
The error of the single frequency GPS positioning for September 13th, 2025, 04.00 UT - September 14th, 2025, 03.59 UT was at a normal level, based on ionospheric scintillation and TEC variation.
The error of the single frequency GPS positioning for September 14th, 2025, 04.00 UT - September 15th, 2025, 03.59 UT was at a 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 at a normal level.

HF Radio Communication

MUF depression and Short Wave Fadeout (SWF) cannot be evaluated for September 12th, 2025, 04.00 UT - September 13th, 2025, 03.59 UT.
MUF depression and Short Wave Fadeout (SWF) cannot be evaluated for September 13th, 2025, 04.00 UT - September 14th, 2025, 03.59 UT.
MUF depression and Short Wave Fadeout (SWF) cannot be evaluated for September 14th, 2025, 04.00 UT - September 15th, 2025, 03.59 UT.

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 quiet level due to the prediction of a solar flare.

Satellites

The electron flux was at a high level on 12 September 2025 04:00UT - 13 September 2025 03:59UT.

The electron flux was at a high level on 13 September 2025 04:00UT - 14 September 2025 03:59UT.

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

A low level of electron flux is expected for the next 24 hours.

The flux of high-energy protons was quiet for September 12th, 2025, 04.00 UT - September 13th, 2025, 03.59 UT.
The flux of high-energy protons was quiet for September 13th, 2025, 04.00 UT - September 14th, 2025, 03.59 UT.
The flux of high-energy protons was quiet for September 14th, 2025, 04.00 UT - September 15th, 2025, 03.59 UT.

Based on today's condition, the flux of high-energy protons is predicted to be in a quiet condition for the next 24 hours.