Detailed Information

Solar Activity

Solar activity in the past 24 hours was eruptive.

Three C-class flares occurred in the past 24 hours. The strongest were C6.7 flares peaked at 00:02 UT from NOAA 14465. There were two type III solar radio bursts and six CMEs observed during this period. The west-directed CMEs had the highest median velocity of 1430 km/s and an angular width of 60°, while the east-directed CMEs had the highest median velocity of 501 km/s and an angular width of 192°. The latest SDO/HMI intensitygram data show seven active regions (NOAA 14456, 14459, 14462, 14463, 14464, 14465, and 14466), while the latest BBSO H-alpha data show two H-alpha plages (NOAA 14461 and 14467) on the solar disk. The GONG Calibrated Farside Map indicates that no new active regions are expected to appear on the solar limb in the next 24 hours.

Based on today's conditions, 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 507 km/s to 415 km/s. The north-south component of interplanetary magnetic field fluctuate between -7.3 nT and 6.8 nT. There was geoeffective coronal hole at central equator, while the others at north-east and eastern equator were not geoeffective. CME on 10 June 2026 15:24 UT was mainly errupted toward north-west with speed of 348 km/s and angular width of 72°. 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

Ionosfer was in minor conditions on 24 hours.

There was depression in the foF2 of its median value for 175 minutes in the last 24 hours. There was no an increment in fmin exceeding 30% of its median value in the last 24 hours. There was no a Spread-F Event in the last 24 hours. Sporadic E-layer during the day and night for 930 minutes with foEs values higher than foF2 values in the last 24 hours. The ionospheric scintillation index (S4) above Pontianak was less than 0.5 (quiet) and the maximum TEC value was 62.87 (quiet) both observed above Pontianak.

The ionosphere activity is predicted to be quiet for the next 24 hours.

Navigation

The error of the single frequency GPS positioning for the next 24 hours was on normal 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 normal level.

HF Radio Communication

In the last 24 hours, the Maximum Usable Frequency (MUF) Depression was at a moderate level, and the Short-Wave Fadeout (SWF) was at a quiet level.

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

The SWF for the next 24 hours 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.

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

The flux of high-energy protons in the past 24 hours was quiet.

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