Detailed Information

Solar Activity

Solar activity was eruptive in the last 24 hours.

There were 12 flares with all of them are C-class flares, in the last 24 hours. The maximum flare class was C8.9 from UNKNOWN REGION, peaked at 19:36UT. There were 4 type III solar radio bursts that occurred in the last 24 hours. There were 3 CME events in the last 24 hours. The east-directed CME has the highest median velocity of 919 km/s with an angular width of 6 degrees, and no west-directed CMEs are observed. The latest SDO/HMI Intensitygram data shows 5 active regions (NOAA 4130, 4134, 4135, 4136, 4137), and the latest BBSO H-Alpha data shows 1 H-Alpha plage (NOAA 4132). Farside data shows 3 regions due to return 1from 1 Jul to 13 Jul from the east limb of the Solar disk.

Based on today's condition, 
the solar activity for 11 July 2025, 04:00 UT - 12 July 2025, 03:59 UT is predicted to be active.
the solar activity for 12 July 2025, 04:00 UT - 13 July 2025, 03:59 UT is predicted to be active.
the solar activity for 13 July 2025, 04:00 UT - 14 July 2025, 03:59 UT is predicted to be eruptive.

Geomagnetic Activity

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

The solar wind speed decreased from 498 km/s to 373 km/s, north-south component of the interplanetary magnetic field fluctuated between -3.8 nT and 3.4 nT. There were geoeffective coronal holes at the eastern equator and the central equator, while the others at the north-east were not geoeffective.

Quiet level geomagnetic activity is expected for the next 24 hours.
Quiet level geomagnetic activity is expected for 12 July 2025 07UT - 13 July 2025 07UT
Quiet level geomagnetic activity is expected for 13 July 2025 07UT - 14 July 2025 07UT

Ionospheric Activity

Ionosphere was in Quiet conditions for the last 24 hours.

There was the depression of foF2 lower than 30% of its median value in the last 24 hours for 15 minutes. There was no an increment of fmin more than 30% of its median values in the last 24 hours. The Spread-F did not occurred in the last 24 hours.The Sporadic-E occurred in the night and daytime with foEs value exceeded the foF2 for several times for 465 minutes in the last 24 hours. The S4 index values (condition of ionospheric scintillation ) was less than 0.5 and the maximum TEC index value was at 60.91 TECU over Pontianak for the last 24 hours.

Ionospheric activity on July 11, 2025, 04:00 UT - July 12, 2025, 03:59 UT is predicted to be Quiet.
Ionospheric activity on July 12, 2025, 04:00 UT - July 13, 2025, 03:59 UT is predicted to be Quiet.
Ionospheric activity on July 13, 2025, 04:00 UT - July 14, 2025, 03:59 UT is predicted to be Quiet.

 

Navigation

Over the past 24 hours, positioning errors using single-frequency GPS have fluctuated within Normal levels based on variations in ionospheric scintillation and TEC.

The positioning error probability for July 11, 2025, 04:00 UT - July 12, 2025, 03:59 UT is predicted to fluctuate at Normal levels, based on variations in ionospheric scintillation and TEC.
The positioning error probability for July 12, 2025, 04:00 UT - July 13, 2025, 03:59 UT is predicted to fluctuate at Normal levels, based on variations in ionospheric scintillation and TEC.
The probability of positioning error for July 13, 2025, 04:00 UT - July 14, 2025, 03:59 UT is predicted to be disturbed at Normal levels, based on variations in ionospheric scintillation and TEC.

HF Radio Communication

In the last 24 hours, the Maximum Usable Frequency (MUF) Depression was at Quiet levels and the Short Wave Fadeout (SWF) was at Quiet levels.

The MUF Depression for July 11, 2025, 04:00 UT - July 12, 2025, 03:59 UT is predicted to be at Quiet levels based on past geomagnetic activity.
The MUF Depression for July 12, 2025, 04:00 UT - July 13, 2025, 03:59 UT is predicted to be at Quiet levels based on past geomagnetic activity.
The MUF Depression for July 13, 2025, 04:00 UT - July 14, 2025, 03:59 UT is forecasted at Quiet based on past geomagnetic activity.

The SWF for July 11, 2025, 04:00 UT - July 12, 2025, 03:59 UT is forecasted at Minor based on predicted solar flare classes.
The SWF for July 12, 2025, 04:00 UT - July 13, 2025, 03:59 UT is forecasted at Minor based on predicted solar flare classes.
The SWF for July 13, 2025, 04:00 UT - July 14, 2025, 03:59 UT is forecasted at Quiet based on predicted solar flare classes.

Satellites

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

High level of electron flux is expected for the next 24 hours.
Low level of electron flux is expected for 12 July 2025 07UT - 13 July 2025 07UT
Low level of electron flux is expected for 13 July 2025 07UT - 14 July 2025 07UT

The flux of high-energy protons in the past 24 hours was quiet. 
Based on today's condition, 
the flux of high-energy protons for 11 July 2025 2025, 04:00 UT - 12 July 2025 2025, 03:59 UT is predicted to be quiet.
the flux of high-energy protons for 12 July 2025 2025, 04:00 UT - 13 July 2025 2025, 03:59 UT is predicted to be quiet.
the flux of high-energy protons for 13 July 2025 2025, 04:00 UT - 14 July 2025 2025, 03:59 UT is predicted to be quiet.