SPACE WEATHER INFORMATION AND FORECAST SERVICES

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

2026 Aug 27

Geomagnet

Quiet

Ionosphere

Quiet

Forecast

Geomagnet

Active

Ionosphere

Quiet

Issued : 2026 August 27 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 over the past 24 hours was active

A total of six solar flares were observed, comprising four C-class and two M-class flares. No X-class flares were observed. The most significant event was an M2.2 flare originating from NOAA 14513, which peaked at 06:34 UT. Associated with the flare activity, one type III and one type-II solar radio bursts were detected. On the visible disk, four active regions were identified by SDO/HMI: NOAA 14513, NOAA 14515, NOAA 14516, NOAA 14517, NOAA 14518 and NOAA 14519. There were no H-Alpha plage presents. No farside region is due to return to the visible disk for the next 24 hours. 

The solar activity for the next 24 hours is predicted to remain active, with the potential for M-class flares.

Geomagnetic Activity

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

The solar wind speed decrease from 360 km/s to 308 km/s, north-south component of interplanetary magnetic field fluctuate between -1.9 nT and 4.5 nT. There was geoeffective coronal hole at south pole, while the other at north-east were not geoeffective. 

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

Ionospheric Activity

Ionosfer was in quite conditions on 24 hours.
There was no depression in the foF2 from its median 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 975 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 65.41 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 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 quite level, and the Short-Wave Fadeout (SWF) was at a quite 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 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 10 MeV proton flux remained elevated over the past 24 hours, with an event currently in progress
This quiet condition is expected for the next 24 hours.