Detailed Information

Solar Activity

Solar activity was eruptive over the past 24 hours. Three C-class flares were observed, with no M-class or X-class flares reported. The strongest event was a C4.0 flare from NOAA 14384, peaking at 10:46 UT. No solar radio bursts were reported in association with this activity. One coronal mass ejection was observed, originating from the east limb with a speed of 536 kilometers per second and an angular width of 24 degrees.

On the visible disk, nine active regions were identified by SDO/HMI: NOAA 14381, NOAA 14384, NOAA 14387, NOAA 14388, NOAA 14389, NOAA 14390, NOAA 14391, NOAA 14392, and NOAA 14393. Additionally, one H-alpha plage, NOAA 14385, was observed by BBSO. No farside regions were observed returning to the visible disk.

Based on predictions from the Random Forest model, solar activity for :
March 13th, 2026 04:00 UT - March 14th, 2026 03:59 UT is predicted to be eruptive.
March 14th, 2026 04:00 UT - March 15th, 2026 03:59 UT is predicted to be eruptive.
March 15th, 2026 04:00 UT - March 16th, 2026 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 decrease from 570 km/s to 382 km/s. The north-south component of interplanetary magnetic field decrease from 4.6 nT to -5.7 nT. There were geoeffective coronal holes at eastern equator and southwest. The CME on 13 March 2026 14:24 UT was mainly errupted toward eastern with speed of 446 km/s and angular width of 24°. The CME was not geoeffective and have not impact until next 3 days.

Quiet level geomagnetic activity is expected for the next 24 hours.
Quiet level geomagnetic activity is expected for 14 March 2026 04UT - 15 March 2026 04UT.
Quiet level geomagnetic activity is expected for 15 March 2026 04UT - 16 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 an increment of fmin more than 30% of its median values for 45 minutes. There was a Spread-F layer for 15 minutes and the Sporadic-E for 750 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 March 13th, 04:00 UT - March 14th, 03:59 UT is predicted to be Quiet.
The ionosphere activity on March 14th, 04:00 UT - March 15th, 03:59 UT is predicted to be Quiet.
The ionosphere activity on March 15th, 04:00 UT - March 16th, 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 March 13th, 04:00 UT - March 14th, 03:59 UT is predicted at a normal level.
Based on ionospheric scintillation and TEC variation, the probability of error positioning on March 14th, 04:00 UT - March 15th, 03:59 UT is predicted at a normal level.
Based on ionospheric scintillation and TEC variation, the probability of error positioning on March 15th, 04:00 UT - March 16th, 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 level for the last 24 hours.

The MUF depression on March 13th, 04:00 UT - March 14th, 03:59 UTT is predicted on a quiet level, based on the LAPAN Time Series method.
The MUF depression on March 14th, 04:00 UT - March 15th, 03:59 UT is predicted on a quiet level, due to previous geomagnetic activity.
The MUF depression on March 15th, 04:00 UT - March 16th, 03:59 UT is predicted on a quiet level, due to previous geomagnetic activity.

The SWF on March 13th, 04:00 UT - March 14th, 03:59 UT is predicted at a quiet level due to the prediction of solar flare.
The SWF on March 14th, 04:00 UT - March 15th, 03:59 UT is predicted at a quiet level due to the prediction of solar flare.
The SWF on March 15th, 04:00 UT - March 16th, 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 electron flux is expected for the next 24 hours.
High level of electron flux is expected for 14 March 2026 04UT - 15 March 2026 04UT.
High level of electron flux is expected for 15 March 2026 04UT - 16 March 2026 04UT.

The proton flux remained quiet over the past 24 hours. Based on the observed conditions from the preceding 24 hours, the flux of high energy proton for :
March 13th, 2026 04:00 UT - March 14th, 2026 03:59 UT is predicted to be quiet.
March 14th, 2026 04:00 UT - March 15th, 2026 03:59 UT is predicted to be quiet.
March 15th, 2026 04:00 UT - March 16th, 2026 03:59 UT is predicted to be quiet.