Detailed Information

Solar Activity

Solar activity was eruptive in the last 24 hours.

There were 16 C-class flares observed in the last 24 hours. The strongest flare was a C4.5 event, peaking at 4:23 UT from NOAA 14465. There were 8 Type III solar radio bursts and five coronal mass ejections observed in the last 24 hours. The west-directed CME has the highest median velocity of 369 km/s with an angular width of 24 degrees, while the east-directed CME has the highest median velocity of 231 km/s and an angular width of 68 degrees. The latest SDO/HMI Intensitygram data shows 8 active regions (NOAA 14456, NOAA 14458, NOAA 14459, NOAA 14462, NOAA 14463, NOAA 14464, NOAA 14465, and NOAA 14466), and the latest BBSO H-Alpha data shows 1 H-Alpha plage (NOAA 14461). Two active regions are currently on the farside and are expected to return to the visible disk between June 10 and June 12. 

Based on today's condition, solar activity for the next 24 hours is predicted to be active, with the Random Forest model forecasting a maximum flare class of M.

Geomagnetic Activity

The geomagnetic activity was on quiet level for the last 24 hours.
The solar wind speed decrease from 520 km/s to 450 km/s, north-south component of interplanetary magnetic field fluctuate between -4.4 nT and 3.7 nT.  There were geoeffective coronal holes at eastern equator and central equator, while the others at south-west and north-east were not geoeffective. CME on 09 June 2026 20:48 UT was mainly errupted toward south-west with speed of 248 km/s and angular width of 38°. 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 for the last 24 hours.

There was depression of foF2 lower than 30% of its median value for 15 minutes. There was increment of fmin more than 30% of its median values for 30 minutes.  The Spread-F occured for 105 minute for the last 24 hours. The Sporadic-E occurred in the night and daytime with foEs value exceeded the foF2 for several times for 675 minutes. The S4 index values (condition of ionospheric scintillation ) was less than 0.4 and the maximum TEC index value was at 65.07 both over Pontianak for the last 24 hours.

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

Navigation

The error of the single-frequency GPS positioning for the last 24 hours was disturbed at a 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 disturbed at a normal level.

HF Radio Communication

Maximum Usable Frequency (MUF) Depression was in quiet condition and the Short Wave Fadeout (SWF) was in minor for the last 24 hours.

The MUF Depression for the next is predicted to be at quiet levels based on past geomagnetic activity.

The SWF for the next 24 hours is forecasted at minor based on predicted solar flare classes.

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.

The proton flux in the last 24 hours was quiet. 
The proton flux is predicted to remain quiet for the next 24 hours, based on the conditions observed in the last 24 hours.