
Center for Space Research
The National Research and Innovation Agency
BRIN - Indonesia
Issued : 2025 December 03 0800 UTC
Forecast Valid For 24 Hours
Solar activity was eruptive in the last 24 hours.
There were 11 flares with all of them are C-class flares in the last 24 hours. The maximum flare class was C5.4 from NOAA4288 peaked at 20:38UT.
There were 11 solar radioburst all of which are type-III occurred in the last 24 hours. There was no CME event in the last 24 hours. The latest SDO/HMI Intensitygram data shows 10 active regions (NOAA4288,4290,4291,4294,4295,4296,4297,4298,4299,4300) and the latest BBSO H-Alpha data shows 1 H-Alpha plages (NOAA4293).
Based on farside data shows 2 Regions Due to Return 03 Dec to 05 Dec from the east limb of the Solar disk.
Based on today's condition, solar activity for the next 24 hours is predicted to be major flare.
The geomagnetic activity was on quiet level for the last 24 hours.
The solar wind speed decrease from 534 km/s to 405 km/s, north-south component of interplanetary magnetic field decrease from 2.8 nT to -4.7 nT There was geoeffective coronal hole at central equator, while the others at eastern equator and south-west were not geoeffective.
Quiet level geomagnetic activity is expected for the next 24 hours.
Ionosphere cannot be evaluated the last 24 hours
The ionospheric activity for the last 24 hours cannot be evaluated due to problems with the CADI station. The S4 index values (condition of ionospheric scintillation) were less than 0.5 so the scintillation was on quiet level, and the maximum TEC index value were at 74.78 in the last 24 hours, both measurement over Pontianak.
The ionosphere activity is predicted to be quiet for the next 24 hours
The error of the single frequency GPS positioning for the next 24 hours was on 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 to be on normal level.
MUF depression and Short Wave Fadeout (SWF) cannot be evaluated for the last 24 hours.
The MUF depression for the next 24 hours is predicted at a quiet level, due to previous geomagnetic activity.
The SWF for the next 24 hours is predicted at a strong level due to the prediction of a solar flare.
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 flux of high-energy protons was quiet proton event for the last 24 hours.
Based on today's conditions, The flux of high-energy protons for the next 24 hours is predicted to be quiet.