SPACE WEATHER INFORMATION AND FORECAST SERVICES

Center for Space Research
The National Research and Innovation Agency
BRIN - Indonesia

2026 Jun 09

Geomagnet

Active

Ionosphere

Moderate

Forecast

Geomagnet

Active

Ionosphere

Minor

Issued : 2026 June 09 0800 UTC
Forecast Valid For 24 Hours

ESSENTIAL INFORMATION FOR SPACE WEATHER COMMUNITIES

HF Radio Communication

MUF Depression

Shortwave Fadeout / Radio Blackout

NAVIGATION

Error Positioning

SATELLITES

High Energy Proton

High Energy Electron

Detailed Information

Solar Activity

Solar activity was eruptive in the last 24 hours.

There were 10 flares with all of them are C-class flares in the last 24 hours. The maximum flare class was C4.5 from NOAA 4465 peaked at 05:10 UT. There was 1 solar radioburst  type-III occurred in the last 24 hours. There was 2 CME event in the last 24 hours. The west-directed CME has the highest median velocity of 190 km/s with an angular width of 40 degrees and the east-directed CME has the highest median velocity 710 km/s with angular width of 32 degrees. The latest SDO/HMI Intensitygram data shows 8 active regions (NOAA 4455, 4456, 4458, 4459, 4462, 4463, 4464, and 4465) and the latest BBSO H-Alpha data shows 1 H-Alpha plages (NOAA 4461). Based on farside data shows 1 Regions from the east limb of the Solar disk.

Based on today's condition, solar activity for the next 24 hours is predicted to be eruptive.

Geomagnetic Activity

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

The solar wind speed decreased from 612 km/s to 478 km/s, and the north-south component of the interplanetary magnetic field fluctuated between -4.5 nT and 4.2 nT. There were geoeffective coronal holes at the south-west and central equator, while the others at the eastern equator and south-west were not geoeffective.

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

Ionospheric Activity

Ionosfer was in moderate conditions on 24 hours.
There was depression in the foF2 from its median for 345 minutes in the last 24 hours. There was no increment in fmin exceeding 30% of its median value in the last 24 hours. There was no Spread-F event in the last 24 hours. Sporadic E-layer during the day and night for 780 minutes with foEs values ​​higher than foF2 values ​​in the last 24 hours. The ionospheric scintillation index (S4) above Pontianak, had a value below 0.5 at a quite level and the maximum TEC value was 59.27 both observed above Pontianak.
The ionosphere activity is predicted to be minor 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 strong level, and the Short-Wave Fadeout (SWF) was at a quite level.
The MUF depression for the next 24 hours is predicted at a minor level, due to previous geomagnetic activity.
The SWF for the next 24 hours is predicted at a quiet level due to the prediction of a solar flare.

Satellites

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

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

The flux of high-energy protons was quiet for the last 24 hours.

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