Detailed Information

Solar Activity

Solar activity was active in the last 24 hours. 

Flaring activity consisted of 11 C-class flares and 1 M-class flares, with no X-class flares observed in the last 24 hours. The maximum flare event was an M1.0 from NOAA 4425, peaking at 06:45 UT. Two Type III radio bursts and one CME event were detected in the last 24 hours. One westward-directed Coronal Mass Ejections (CMEs) was observed, showing a speed of 398 km/s and an angular width of 16 degrees. The latest SDO/HMI Intensitygram data shows 6 active regions (NOAA 4420, NOAA 4421, NOAA 4423, NOAA 4424, NOAA 4425, and NOAA 4427) and the latest BBSO H-Alpha data shows one H-Alpha plages (NOAA 4426). No active regions are expected to return from the east limb. 

Based on today's condition, solar activity for the next 24 hours 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 480 km/s to 405 km/s. The north-south component of interplanetary magnetic field stable around 1.6 nT. There were coronal holes at equator, south-west and north-east were not geoeffective. CME on 27 April 2026 14:12 UT was mainly errupted toward north-west with speed of 398 km/s and angular width of 16°. The CME was geoeffective and is likely to have not impact on next 24 hours.

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

Ionospheric Activity

Ionosphere was in quiet conditions.

There was no depression of foF2 lower than 30% of its median value. There was an increment of fmin of more than 30% of its median values for 195 minutes. There was Spread-F for 180 minutes occurred in the last 24 hours. The Sporadic-E did occur in the night and daytime with foEs values exceeding the foF2 values for 810 minutes. In the last 24 hours, the S4 index values (condition of ionospheric scintillation ) was < 0.5 (quiet), and the TEC was less than 120 TECU. Both are observed over Pontianak.

The ionosphere activity in the next 24 hours 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 in the next 24 hours is predicted at a normal level.

HF Radio Communication

MUF depression was in quiet condition, and Short Wave Fadeout (SWF) was in strong level for the last 24 hours.

The MUF depression in the next 24 hours is predicted at a quiet level, due to the previous geomagnetic activity.

The SWF for the next 24 hours is predicted at a minor level due to the prediction of the solar flare.

 

Satellites

The electron flux was on low level for the last 24 hours.
Low level of elektron flux is expected for the next 24 hours.

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