Detailed Information

Solar Activity

The overall solar activity in the last 24 hours was eruptive. A total of 5 solar flares were observed, consisting of 5 C-class flares, 0 M-class flares, and 0 X-class flares. The most intense flare was a C6.3, peaking at 19:09UT from an UNKNOWN REGION. Solar radio burst activity included a total of 2 Type III bursts. No Type II or Type IV radio bursts were observed. No Coronal Mass Ejections (CMEs) were observed in the last 24 hours. Three active regions were observed via SDO/HMI, identified as NOAA 14378, NOAA 14379, and NOAA 14380. No H-alpha plages were identified via BBSO. No farside regions are currently expected to return from the east limb.

Based on today's condition, solar activity for:

February 27th, 2026 04:00 UT - February 28th, 2026 03:59 UT is predicted to be active, with a maximum flare class of M predicted by the Random Forest model.
February 28th, 2026 04:00 UT - March 1st, 2026 03:59 UT is predicted to be active.
March 1st, 2026 04:00 UT - March 2nd, 2026 03:59 UT is predicted to be active.

 

Geomagnetic Activity

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

The solar wind speed decrease from 608 km/s to 474 km/s. The north-south component of interplanetary magnetic field fluctuate between -5.7 nT and 5.0 nT. There were geoeffective coronal holes at north-west and equator, while the others at southern and north-east were not geoeffective. The CME on 26 February 2026 02:00 UT was mainly errupted toward =south-east with speed of 126 km/s and angular width of 820°. The CME was not geoeffective and have not impact until next 3 days.

Minor storm level geomagnetic activity is expected for the next 24 hours.
Quiet level geomagnetic activity is expected for 28 February 2026 04UT - 01 March 2026 04UT.
Quiet level geomagnetic activity is expected for 01 March 2026 04UT - 02 March 2026 04UT.

Ionospheric Activity

Ionosfer 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 no an increment of fmin more than 30% of its median values. There was a Spread-F layer for 30 minutes and the Sporadic-E for 630 minutes in the night and daytime with foEs value exceeding the foF2 value. 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 February 27th, 04:00 UT - February 28th, 03:59 UT is predicted to be Quiet.
The ionosphere activity on February 28th, 04:00 UT - March 1st, 03:59 UT is predicted to be Minor.
The ionosphere activity on March 1st, 04:00 UT - March 2nd, 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 February 27th, 04:00 UT - February 28th, 03:59 UT is predicted at a normal level.
Based on ionospheric scintillation and TEC variation, the probability of error positioning on February 28th, 04:00 UT - March 1st, 03:59 UT is predicted at a normal level.
Based on ionospheric scintillation and TEC variation, the probability of error positioning on March 1st, 04:00 UT - March 2nd, 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 for the last 24 hours.

The MUF depression on February 27th, 04:00 UT - February 28th, 03:59 UT is predicted on a quiet level, based on the LAPAN Time Series method.
The MUF depression on February 28th, 04:00 UT - March 1st, 03:59 UT is predicted on a minor level, due to previous geomagnetic activity.
The MUF depression on March 1st, 04:00 UT - March 2nd, 03:59 UT is predicted on a quiet level, due to previous geomagnetic activity.

The SWF on February 27th, 04:00 UT - February 28th, 03:59 UT  is predicted at a minor level due to the prediction of solar flare.
The SWF on February 28th, 04:00 UT - March 1st, 03:59 UT is predicted at a minor level due to the prediction of solar flare.
The SWF on March 1st, 04:00 UT - March 2nd, 03:59 UT is predicted at a minor level due to the prediction of solar flare.
 

Satellites

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

High level of electron flux is expected for the next 24 hours.
High level of electron flux is expected for 28 February 2026 04UT - 01 March 2026 04UT.
High level of electron flux is expected for 01 March 2026 04UT - 02 March 2026 04UT.

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

Based on today's condition, the flux of high-energy protons for :

February 27th, 2026 04:00 UT - February 28th, 2026 03:59 UT is predicted to be quiet.
February 28th, 2026 04:00 UT - March 1st, 2026 03:59 UT is predicted to be quiet.
March 1st, 2026 04:00 UT - March 2nd, 2026 03:59 UT is predicted to be quiet.