Detailed Information

Solar Activity

Solar activity was active in the last 24 hours.

Ten solar flares were observed, consisting of nine C-class flares and one M-class flare. No X-class flares were observed. The strongest event was an M3.9 flare originating from NOAA 14403, peaking at 6:23 UT. Associated with this activity, three Type III radio bursts were detected. No Type II or Type IV radio bursts were observed. Five coronal mass ejections were detected. One CME was observed propagating from the eastern limb with a speed of 1460 km/s and an angular width of 6 degrees. No CMEs were detected from the western limb. On the visible disk, seven active regions were identified by SDO/HMI: NOAA 14397, NOAA 14398, NOAA 14399, NOAA 14400, NOAA 14401, NOAA 14402, and NOAA 14403. No H-alpha plages were reported by BBSO. Furthermore, two regions are due to return from the farside between 27 March and 29 March.

Based on today's condition,
Solar activity from 27 March 2026, 04:00 UT - 28 March 2026, 03:59 UT is predicted to be active.
Solar activity from 28 March 2026, 04:00 UT - 29 March 2026, 03:59 UT is predicted to be active.
Solar activity from 29 March 2026, 04:00 UT to 30 March 2026, 03:59 UT is predicted to be active.

 

Geomagnetic Activity

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

The solar wind speed decrease from 633 km/s to 435 km/s, north-south component of interplanetary magnetic field fluctuate between -8.1 nT and 8.6 nT. There were geoeffective coronal holes at equator, while the others at southern and eastern were not geoeffective. The CME on 26 March 2026 01:48 UT was mainly errupted toward northwestern with speed of 141 km/s and angular width of 26°. 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 28 March 2026 04UT - 29 March 2026 04UT.
Quiet level geomagnetic activity is expected for 29 March 2026 04UT - 30 March 2026 04UT.

Ionospheric Activity

The ionosphere was in quiet conditions for the last 24 hours.

There was no depression of foF2 below 30% of its median value over the last 24 hours. There was an increase in fmin of more than 30% above its median value for 15 minutes over the last 24 hours. The Spread-F occurred for 375 minutes over the last 24 hours. The Sporadic-E occurred at night and during the day for 1140 minutes, with the foEs value exceeding the foF2 for the last 24 hours. S4 index values (condition of ionospheric scintillation ) were less than 0.8, and the TEC was below 120 TECU over the last 24 hours. Both are observed over Pontianak. 

The ionosphere activity on 27 March 2026, 04:00 UT - 28 March 2026, 03:59 UT is predicted to be quiet.
The ionosphere activity on 28 March 2026, 04:00 UT - 29 March 2026, 03:59 UT is predicted to be quiet.
The ionosphere activity on 29 March 2026, 04:00 UT - 30 March 2026, 03:59 UT is predicted to be quiet.
 

Navigation

Based on TEC and scintillation, the error of the single-frequency GPS positioning for the last 24 hours was at a normal level.

Based on ionospheric scintillation and TEC variation, the probability of error positioning on 27 March 2026, 04:00 UT - 28 March 2026, 03:59 UT is predicted at a normal level.
Based on ionospheric scintillation and TEC variation, the probability of error positioning on 28 March 2026, 04:00 UT - 29 March 2026, 03:59 UT is predicted at a normal level.
Based on ionospheric scintillation and TEC variation, the probability of error positioning on 29 March 2026, 04:00 UT - 30 March 2026, 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 for the last 24 hours.

The MUF depression from 27 March 2026, 04:00 UT to 28 March 2026, 03:59 UT is predicted to be at a quiet level due to previous geomagnetic activity.
The MUF depression from 28 March 2026, 04:00 UT to 29 March 2026, 03:59 UT is predicted to be at a quiet level due to previous geomagnetic activity.
The MUF depression from 29 March 2026, 04:00 UT to 30 March 2026, 03:59 UT is predicted to be at a quiet level due to previous geomagnetic activity.

The SWF on 27 March 2026, 04:00 UT - 28 March 2026, 03:59 UT is predicted at a minor level due to the prediction of a solar flare.
The SWF on 28 March 2026, 04:00 UT - 29 March 2026, 03:59 UT is predicted at a minor level due to the prediction of a solar flare.
The SWF on 29 March 2026, 04:00 UT - 30 March 2026, 03:59 UT is predicted at a minor level due to the prediction of a 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 March 2026 04UT - 29 March 2026 04UT.
High level of electron flux is expected for 29 March 2026 04UT - 30 March 2026 04UT.

The 10 MeV proton flux remained at quiet levels over the past 24 hours.

Based on today's condition, 
the flux of high-energy protons for 27 March 2026, 04:00 UT - 28 March 2026, 03:59 UT is predicted to be quiet.
The flux of high-energy protons for 28 March 2026, 04:00 UT - 29 March 2026, 03:59 UT is predicted to be quiet.
The flux of high-energy protons for 29 March 2026, 04:00 UT - 30 March 2026, 03:59 UT is predicted to be quiet.