Detailed Information

Solar Activity

Solar activity was eruptive in the last 24 hours.

There were 3 flares with all of them are C-class flares in the last 24 hours. The maximum flare class was C5.9 from NOAA 4136 peaked at 9:28 UT. There were 1 solar radioburst all of which are type-III occurred in the last 24 hours. There was no CME event in the last 24 hours. No plage in the solar disk but latest SDO/HMI Intensitygram data shows 11 active regions (NOAA 4135, 4136, 4139, 4140, 4142, 4143, 4144, 4145, 4146, 4147, and 4148). Based on farside data shows 2 Regions Due to Return 18 Jul to 20 Jul from the east limb of the Solar disk.

Based on today's condition,

the solar activity for the next 24 hours is predicted to be active,

the solar activity for 19th July 2025, 04:00 UT – 20th July 2025, 03:59 UT is predicted to be eruptive,

the solar activity for 20th July 2025, 04:00 UT – 21st July 2025, 03:59 UT 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 498 km/s and 721 km/s, north-south component of interplanetary magnetic field increase from -7.5 nT to 7.3 nT Coronal holes at south-west were geoeffective and eastern equator were not geoeffective. 

Quiet level geomagnetic activity is expected for the next 24 hours.
Quiet level geomagnetic activity is expected for 19 July 2025 04UT - 20 July 2025 04UT
Quiet level geomagnetic activity is expected for 20 July 2025 04UT - 21 July 2025 04UT

Ionospheric Activity

Ionosphere was in quiet condition for the last 24 hours.

There was no a depression of foF2 lower than 30% of its median value. There was an increment of fmin more than 30% of its median values for 75 minutes. There was no a Spread-F layer. The Sporadic-E occurred in the night and daytime with foEs value exceeding the foF2 value for 165 minutes. The S4 index values (condition of ionospheric scintillation) was less than 0.5 (quiet) and TEC index was less than 120 (quiet).

The ionosphere activity on July 18th, 04:00 UT - July 19th, 03:59 UT is predicted to be Quiet.
The ionosphere activity on July 19th, 04:00 UT - July 20th, 03:59 UT is predicted to be Quiet.
The ionosphere activity on July 20th, 04:00 UT - July 21st, 03:59 UT is predicted to be Quiet.

Navigation

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

Based on ionospheric scintillation and TEC variation, the probability of error positioning on July 18th, 04:00 UT - July 19th, 03:59 UT is predicted at a normal level.
Based on ionospheric scintillation and TEC variation, the probability of error positioning on July 19th, 04:00 UT - July 20th, 03:59 UT is predicted at a normal level.
Based on ionospheric scintillation and TEC variation, the probability of error positioning on July 20th, 04:00 UT - July 21st, 03:59 UT is predicted at a normal level.

HF Radio Communication

MUF depression was in quiet condition and Short Wave Fadeout (SWF) was in moderate for the last 24 hours.

 

The MUF depression on July 18th, 04:00 UT - July 19th, 03:59 UT is predicted on a quiet level, due to previous geomagnetic activity.
The MUF depression on July 19th, 04:00 UT - July 20th, 03:59 UT is predicted on a quiet level, due to previous geomagnetic activity.
The MUF depression on July 20th, 04:00 UT - July 21st, 03:59 UT is predicted on a quiet level, due to previous geomagnetic activity.

The SWF on July 18th, 04:00 UT - July 19th, 03:59 UT  is predicted at a minor level due to the prediction of solar flare.
The SWF on July 19th, 04:00 UT - July 20th, 03:59 UT is predicted at a quiet level due to the prediction of solar flare.
The SWF on July 20th, 04:00 UT - July 21st, 03:59 UT is predicted at a quiet level due to the prediction of solar flare.

Satellites

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

High level of elektron flux is expected for the next 24 hours.
High level of electron flux is expected for 19 July 2025 04UT - 20 July 2025 04UT
High level of electron flux is expected for 20 July 2025 04UT - 21 July 2025 04UT

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

Based on today's condition,

the high energy proton flux for the next 24 hours is predicted to be quiet,

the flux of high-energy protons for 19th July 2025 2025, 04:00 UT – 20th July 2025 2025, 03:59 UT is predicted to be quiet,

the flux of high-energy protons for 20th July 2025 2025, 04:00 UT – 21st July 2025 2025, 03:59 UT is predicted to be quiet.