Detailed Information

Solar Activity

Solar activity was eruptive in the last 24 hours.

There were 13 flares with all of them are C-class flares in the last 24 hours. The maximum flare class was C6.1 from NOAA 4274 peaked at 16:06 UT. There were 1 solar radioburst all of which are type-III occurred in the last 24 hours. There was 7 CME event in the last 24 hours. The east-directed CME has the highest median velocity of 1330 km/s with an angular width of 24 degrees and the west-directed CME has the highest median velocity of 1038 km/s with an angular width of 180 degrees. The latest SDO/HMI Intensitygram data shows 3 active regions (NOAA 4279, 4283, and 4284) and the latest BBSO H-Alpha data shows 4 H-Alpha plages (NOAA 4276, 4277, 4280, and 4282). Based on farside data shows no active region is going to appear from the east limb of the Solar disk in the next 24 hours.

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

Geomagnetic Activity

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

The solar wind speed decrease from 727 km/s to 245 km/s, north-south component of interplanetary magnetic field decrease from 15.4 nT to -9.5 nT. There was geoeffective coronal hole at south-east, while the others at north-west, eastern equator and north pole were not geoeffective. CME on 17 November 2025 16:29 UT was mainly errupted toward south-west with speed of 695 km/s and angular width of 10°. The CME was geoeffective and is likely to have not impact on next 24 hours.

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

Ionospheric Activity

Ionosphere activity for the last 24 hours cannot be evaluated.

The ionospheric activity regarding the foF2, fmin, Spread-F, and E-sporadis values for the last 24 hours cannot be evaluated due to problems with the CADI station. The S4 index values (condition of ionospheric scintillation) was less than 0.5 and the maximum TEC index value was at 87.63, both over Pontianak.

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

Navigation

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

Based on ionospheric scintilation 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) for the last 24 hours cannot be evaluated due to problems with the CADI station.

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

The SWF for the next 24 hours is predicted in quiet level due to the prediction of solar flare.

Satellites

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

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

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

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