Detailed Information

Solar Activity

Solar activity was active in the last 24 hours.

There were 14 flares with 11 C-class flares and 3 M-class flares in the last 24 hours. The maximum flare class was M4.7 from NOAA 3981 peaked at 11:21 UT. There were 1 solar radioburst type-III occurred in the last 24 hours. There was 5 CME event in the last 24 hours. The east-directed CME has the highest median velocity of 459 km/s with an angular width of 16 degrees and the west-directed CME has the highest median velocity of 229 km/s with an angular width of 24 degrees. The latest SDO/HMI Intensitygram data shows 9 active regions (NOAA 3974, 3976, 3977, 3978, 3981, 3982, 3983, 3984, and 3985) and the latest BBSO H-Alpha data shows 1 H-Alpha plages (NOAA 3980). Based on farside data shows 1 regions due to return 05 Feb to 07 Feb from the east limb of the Solar disk.

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

Geomagnetic Activity

 

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


The solar wind speed decrease from 658 km/s to 378 km/s, north-south component of interplanetary magnetic field fluctuate between -4.7 nT and 10.7 nT There was geoeffective coronal hole at western equator, while the other at eastern equator were not geoeffective. CME on 04 February 2025 16:00 UT was mainly errupted toward north-west with speed of 113 km/s and angular width of 6°. The CME was geoeffective and is likely to have not impact on next 24 hours.

 

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

Ionospheric Activity

Ionosphere was on quiet level for the last 24 hours.

There was no depression of foF2 lower than 30% of its median value for the last 24 hours. There was no increment of fmin more than 30% of its median values. There was no Spread-F occurred the last 24 hours. There was 45 minutes duration of Sporadic-E occurred in the night and daytime with foEs value exceeded the foF2 for several times. The S4 index values (condition of ionospheric scintillation ) was between 0.5 and 0.8 and the maximum TEC index value was at 88.79, both over Pontianak.

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

Navigation

The error of the single frequency GPS positioning for the last 24 hours was in slight 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 was in quiet condition and Short Wave Fadeout (SWF) was quiet for the last 24 hours.

The MUF depression for the next 24 hours is predicted on quiet level, based on Lapan Time Series method.

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

Satellites

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

Low level of elektron 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.