Detailed Information

Solar Activity

Solar activity for July 24th, 2026, 04:00 UT - July 25th, 2026, 03:59 UT was eruptive.
Solar activity for July 25th, 2026, 04:00 UT - July 26th, 2026, 03:59 UT was eruptive.
Solar activity for July 26th, 2026, 04:00 UT - July 27th, 2026, 03:59 UT was active.

A total of nine solar flares were observed, comprising seven C-class flares and two M-class flares. The strongest event was an M3.2 flare originating from NOAA 14494, peaking at 15:28 UT. There were five type III solar radio bursts that occurred in the last 24 hours. There were two east-directed CME events in the last 24 hours, with the highest having a median velocity of 419 km/s and an angular width of 98 degrees. The latest SDO/HMI Intensitygram data shows six active regions (NOAA 14492, NOAA 14493, NOAA 14494, NOAA 14495, NOAA 14496, and NOAA 14497) and the latest BBSO H-Alpha data shows 1 H-Alpha plage (NOAA 14491). Two active regions are currently located on the farside and are expected to return to the visible disk between 27 July and 29 July.

Based on today's conditions, solar activity for the next 24 hours is predicted to be active, with a maximum flare class prediction of M from the Random Forest model.

Geomagnetic Activity

The geomagnetic activity was at quiet level on 24 July 2026 04UT - 25 July 2026 04UT.
The geomagnetic activity was at quiet level on 25 July 2026 04UT - 26 July 2026 04UT.
The geomagnetic activity was on quiet level for the last 24 hours.

The solar wind speed decrease from 548 km/s to 465 km/s. The north-south component of interplanetary magnetic field fluctuate between -4.3 nT and 4.0 nT. There was an geoeffective coronal hole at western equator, while the others at south-east and north-east were not geoeffective. CME on 26 July 2026 20:00 UT was mainly errupted toward north-eastern with speed of 419 km/s and angular width of 98°. The CME was not geoeffective and is likely not to have impact on next 24 hours.

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

Ionospheric Activity

Ionosfer was in quiet conditions on 24 July 04:00 UT - 25 July 03:59 UT.
Ionosfer was in minor conditions on 25 July 04:00 UT - 26 July 03:59 UT.
Ionosfer was in quiet conditions on 26 July 04:00 UT - 27 July 03:59 UT.

There was a depression of foF2 lower than 30% of its median value for 30 minutes in 25-26 July. There were increment of fmin more than 30% of its median values for 15 minutes, 15 minutes, and 30 minutes in the last three days, respectively. There were no Spread-F were occurred for the last three days. The Sporadic-E were occurred in the night and daytime with foEs value exceeding the foF2 value for 1170 minutes, 930 minutes, and 1170 minutes in the last three days, respectively. The S4 index values (condition of ionospheric scintillation ) were lower than 0.5 (quiet) in 24-26 July and less than 0.8 (moderate) in 26-27 July. TEC maximum at 70.97, 66.02, dan 69.18 (quiet) in the last three days.

The ionosphere activity on 27 July 04:00 UT - 28 July 03:59 UT is predicted to be Quiet.

Navigation

Based on TEC, the error of the single-frequency GPS positioning on 24 July 04:00 UT - 25 July 03:59 UT was at a normal level.
Based on TEC, the error of the single-frequency GPS positioning on 25 July 04:00 UT - 26 July 03:59 UT was at a normal level.
Based on TEC, the error of the single-frequency GPS positioning on 26 July 04:00 UT - 27 July 03:59 UT was at a slight level.

Based on ionospheric scintillation and TEC variation, the probability of error positioning on 27 July 04:00 UT - 28 July 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 quiet level on 24 July 04:00 UT - 25 July 03:59 UT.
MUF depression was in minor condition and Short Wave Fadeout (SWF) was in quiet level on 25 July 04:00 UT - 26 July 03:59 UT.
MUF depression was in quiet condition and Short Wave Fadeout (SWF) was in minor level on 26 July 04:00 UT - 27 July 03:59 UT.

The MUF depression on 27 July 04:00 UT - 28 July 03:59 UT is predicted on a quiet level, due to previous geomagnetic activity.

The SWF on 27 July 04:00 UT - 28 July 03:59 UT is predicted at a minor level due to the prediction of solar flare.

Satellites

The electron flux was at high level on 24 July 2026 04UT - 25 July 2026 04UT.
The electron flux was at high level on 25 July 2026 04UT - 26 July 2026 04UT.
The electron flux was on high level for the last 24 hours.

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

The flux of high-energy protons was quiet on July 24th, 2026, 04:00 UT - July 25th, 2026 03.59 UT.
The flux of high-energy protons was quiet on July 25th, 2026, 04:00 UT - July 26th, 2026 03.59 UT.
The flux of high-energy protons was quiet on July 26th, 2026, 04:00 UT - July 27th, 2026 03.59 UT.

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