Detailed Information

Solar Activity

Solar activity over the past 24 hours was eruptive. Two C-class flares were observed, with no M-class or X-class flares. The largest event was a C2.1 flare from NOAA 14402, peaking at 20:47 UT. Associated with these events, two Type III radio bursts were detected, with no Type II or Type IV radio bursts observed. A total of five coronal mass ejections were observed. Those propagating westward had a median speed of 520 km/s and an angular width of 136 degrees. CMEs propagating eastward showed a median speed of 513 km/s with an angular width of 12 degrees.

On the visible disk, SDO/HMI identified 10 active regions: NOAA 14399, NOAA 14401, NOAA 14402, NOAA 14403, NOAA 14404, NOAA 14405, NOAA 14406, NOAA 14407, NOAA 14408, and NOAA 14409. No H-alpha plages were observed by BBSO. Additionally, one region is anticipated to return from the farside between March 31 and April 02. Looking ahead, solar activity for the next 24 hours is predicted to remain eruptive, with the Random Forest model forecasting a maximum flare class of C.

Geomagnetic Activity

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

The solar wind speed increases from 326 km/s to 484 km/s, and the north-south component of the interplanetary magnetic field fluctuates between -7.3 nT and 11.7 nT. There were geoeffective coronal holes at western equator, while the others at south-west, eastern equator, south pole and north-east were not geoeffective. CME on 30 March 2026 05:36 UT was Halo II with speed of 520 km/s and angular width of 136°. The CME was geoeffective and is unlikely to affect the next 24 hours.

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

Ionospheric Activity

Ionosfer was in quiet conditions on 24 hours.
There was no depression in the foF2 the median in the last 24 hours. There was an increment in fmin exceeding 30% of its median value for 225 minutes in the last 24 hours. There was a Spread-F Event for 120 minutes in the last 24 hours. Sporadic E-layer during the day and night for 720 minutes with foEs values ​​higher than foF2 values ​​in the last 24 hours. The ionospheric scintillation index (S4) above Pontianak, had a value lower than 0.8 at a moderate level and the maximum TEC value was 102.34 both observed above Pontianak.
The ionosphere activity is predicted to be quite for the next 24 hours.

Navigation

The error of the single frequency GPS positioning for the next 24 hours was on slight level, based on ionospheric scintillation and TEC variation.
Based on ionospheric scintillation and TEC variation, the probability of error positioning for the next 24 hours is predicted to be on slight level.

HF Radio Communication

In the last 24 hours, the Maximum Usable Frequency (MUF) Depression was at a quite level, and the Short-Wave Fadeout (SWF) was at a strong level.
The MUF depression for the next 24 hours is predicted at a quite level, due to previous geomagnetic activity.
The SWF for the next 24 hours is predicted at a quite level due to the prediction of a solar flare.

Satellites

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

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

The 10 MeV proton flux remained quiet over the past 24 hours. 
These quiet conditions are expected to continue for the next 24 hours.