Detailed Information

Solar Activity

olar activity in the past 24 hours was eruptive.

Three C-class flares occurred in the past 24 hours. The strongest were C3.9 flares peaked at 12:39 UT from unknown region near the eastern limb. There were no solar radio bursts detected, but four CMEs were observed during this period. The west-directed CMEs had the highest median velocity of 411 km/s and an angular width of 26°, while the east-directed CMEs had the highest median velocity of 539 km/s and an angular width of 8°. The latest SDO/HMI intensitygram data show three active regions (NOAA 14482, 14487, and 14489), while the latest BBSO H-alpha data show two H-alpha plages (NOAA 14481 and 14488) on the solar disk. The GONG Calibrated Farside Map indicates that no new active regions are expected to appear on the solar limb in the next 24 hours.

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

Geomagnetic Activity

The geomagnetic activity was on quiet level for the last 24 hours.
The solar wind speed increase from 398 km/s and 443 km/s, north-south component of interplanetary magnetic field fluctuate between -6.3 nT and 4.5 nT. There were geoeffective coronal holes at central equator, while the others at south-east, north pole and eastern equator were not geoeffective. CME on 14 July 2026 04:36 UT was mainly errupted toward south-west with speed of 411 km/s and angular width of 26°. 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 in strong conditions for the last 24 hours.

There was depression of foF2 lower than 30% of its median value for 375 minutes. There was increment of fmin more than 30% of its median values for 120 minutes.  The Spread-F occured for 150 minute for the last 24 hours. The Sporadic-E occurred in the night and daytime with foEs value exceeded the foF2 for several times for 705 minutes. The S4 index values (condition of ionospheric scintillation ) was less than 0.4 and the maximum TEC index value was at 53.25 both over Pontianak for the last 24 hours.

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

Navigation

The error of the single-frequency GPS positioning for the last 24 hours was disturbed 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 to be disturbed at a normal level.

HF Radio Communication

Maximum Usable Frequency (MUF) Depression was in severe condition and the Short Wave Fadeout (SWF) was in moderate for the last 24 hours.

The MUF Depression for the next is predicted to be at quiet levels based on past geomagnetic activity.

The SWF for the next 24 hours is forecasted at quiet based on predicted solar flare classes.

Satellites

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

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

The flux of high-energy protons in the past 24 hours was quiet.

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