| Check sheet for forecast of geomagnetic disturbances | Forecaster | AFB | ||
|---|---|---|---|---|
| **Previous Forecast | ||||
| Period | 2 days | active/low; active/low. | ||
| Today's Space Weather Condition | |||||
|---|---|---|---|---|---|
| Present | Previous | ||||
| Geomagnetic Activity | quiet | G0 | quiet | G1 | |
| Σ K | Σ Kp | 13o | 22+ | ||
| Max K | Max Kp | 3+ | 4- | ||
| AE Index (onset/sensitivity) | |||||
| 2026:08:30 22:48:53, 12:11:26 hour, 1277 nT | 2026:08:30 00:00:00, 11:58:43 hour, 773 nT | ||||
| 2026:08:31 16:12:41, 03:46:02 hour, 403 nT | 2026:08:30 14:31:06, 04:16:31 hour, 672 nT | ||||
| 2026:08:30 19:07:56, 03:25:43 hour, 420 nT | |||||
| Dst Index (minimum) | -20 | -22 | |||
| Event | |||||
| Solar Wind | Speed (km/sec) | 392 → 495 | 339 → 492 | ||
| Density (/cc) | 3 → 24 | 9 → 25 | |||
| IMF Bz (nT) | -10.4 → 10.6 | -11.4 → 9.0 | |||
| CME | Quadrant | ||||
|
east
(pa: 88°,
da: 26°,
V: 324 km/s)
not geoeffective (index: 0.3) onset: 31 August 2026 04:00 UT approx. arrival: 05 September 2026 |
south-east
(pa: 120°,
da: 18°,
V: 412 km/s)
not geoeffective (index: 3.17) onset: 30 August 2026 04:24 UT approx. arrival: 04 September 2026 |
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|
east
(pa: 97°,
da: 80°,
V: 244 km/s)
not geoeffective (index: 3.15) onset: 31 August 2026 05:24 UT approx. arrival: 10 September 2026 |
north-west
(pa: 312°,
da: 6°,
V: 106 km/s)
geoeffective (index: 5.37) onset: 30 August 2026 11:12 UT approx. arrival: 16 September 2026 |
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|
north
(pa: 15°,
da: 60°,
V: 147 km/s)
not geoeffective (index: 9.08) onset: 30 August 2026 12:12 UT approx. arrival: 15 September 2026 |
|||||
|
south-east
(pa: 119°,
da: 32°,
V: 428 km/s)
not geoeffective (index: 5.32) onset: 30 August 2026 16:48 UT approx. arrival: 05 September 2026 |
|||||
|
norh-east
(pa: 65°,
da: 12°,
V: 665 km/s)
not geoeffective (index: 1.81) onset: 30 August 2026 17:24 UT approx. arrival: 03 September 2026 |
|||||
|
east
(pa: 88°,
da: 26°,
V: 324 km/s)
not geoeffective (index: 0.3) onset: 31 August 2026 04:00 UT approx. arrival: 05 September 2026 |
|||||
| Coronal Hole | Location | Judgement | Location | Judgement | |
|
north-east
(area: 0.2) |
not geoeffective
(-)
(B = -0.7 nT) |
||||
|
eastern equator
(area: 0.2) |
not geoeffective
(+)
(B = 1.2 nT) |
||||
| Electron Fluxes | |||||
| 485 | low | 399 | low | ||
| Solar Activities in Past 4-Days | |||||
|---|---|---|---|---|---|
| Event | Date of Occurrence |
Analysis | Judgement | Comments | |
| CH | 27 August 2026 | ||||
| () | |||||
| CH | 28 August 2026 | ||||
| () | |||||
| CH | 29 August 2026 | ||||
| () | |||||
| CH | 30 August 2026 | ||||
| () | |||||
| CME |
29 August 2026 03:00 UT |
from north-west limb
(pa: 305°, da: 8°, V: 361 km/s) |
geoeffective
(index: 7.25) |
Appr. arrival: 07 September 2026 | |
| CME |
29 August 2026 03:48 UT |
from south-east limb
(pa: 114°, da: 18°, V: 366 km/s) |
not geoeffective
(index: 2.53) |
Appr. arrival: 05 September 2026 | |
| CME |
29 August 2026 05:24 UT |
from east limb
(pa: 77°, da: 24°, V: 240 km/s) |
not geoeffective
(index: 1.81) |
Appr. arrival: 08 September 2026 | |
| CME |
29 August 2026 05:36 UT |
from norh-east limb
(pa: 66°, da: 10°, V: 248 km/s) |
not geoeffective
(index: 1.47) |
Appr. arrival: 06 September 2026 | |
| CME |
29 August 2026 06:36 UT |
from norh-east limb
(pa: 64°, da: 10°, V: 284 km/s) |
not geoeffective
(index: 1.59) |
Appr. arrival: 04 September 2026 | |
| CME |
29 August 2026 08:48 UT |
from norh-east limb
(pa: 50°, da: 18°, V: 218 km/s) |
not geoeffective
(index: 4.22) |
Appr. arrival: 08 September 2026 | |
| CME |
29 August 2026 09:24 UT |
from north limb
(pa: 356°, da: 10°, V: 142 km/s) |
not geoeffective
(index: 3.76) |
Appr. arrival: 11 September 2026 | |
| CME |
29 August 2026 11:01 UT |
from east limb
(pa: 84°, da: 18°, V: 281 km/s) |
not geoeffective
(index: 0.63) |
Appr. arrival: 05 September 2026 | |
| CME |
29 August 2026 11:36 UT |
from norh-east limb
(pa: 34°, da: 26°, V: 246 km/s) |
not geoeffective
(index: 8.4) |
Appr. arrival: 07 September 2026 | |
| CME |
29 August 2026 15:00 UT |
from norh-east limb
(pa: 53°, da: 60°, V: 343 km/s) |
not geoeffective
(index: 12.54) |
Appr. arrival: 06 September 2026 | |
| CME |
29 August 2026 19:00 UT |
from norh-east limb
(pa: 50°, da: 42°, V: 408 km/s) |
not geoeffective
(index: 9.56) |
Appr. arrival: 05 September 2026 | |
| CME |
30 August 2026 01:48 UT |
from norh-east limb
(pa: 66°, da: 74°, V: 352 km/s) |
not geoeffective
(index: 10.0) |
Appr. arrival: 07 September 2026 | |
| Today's Forecast | |
|---|---|
| Period | 1 day |
| Detail Information of Geomagnetic Activity | ||
| English |
The geomagnetic activity was at quiet level on 31 August 2026 07UT - 01 September 2026 07UT.
The geomagnetic activity was on quiet level for the last 24 hours. The solar wind speed fluctuate between 392 km/s and 495 km/s, north-south component of interplanetary magnetic field fluctuate between -10.4 nT and 10.6 nT Coronal holes at north-east and eastern equator were not geoeffective. |
|
| Indonesian |
Aktivitas geomagnet berada pada level tenang pada tanggal 31 Agustus 2026 07UT - 01 September 2026 07UT.
Aktivitas geomagnet berada pada level tenang selama 24 jam terakhir. Kecepatan angin surya berfluktuasi antara 392 km/s dan 495 km/s, komponen utara-selatan medan magnet antarplanet berfluktuasi antara -10.4 nT dan 10.6 nT Lubang korona di timur-laut dan ekuator-timur was tidak geoefektif. |
|
| Forecast of Geomagnetic Activity | ||
|---|---|---|
| English |
Quiet level geomagnetic activity is expected for the next 24 hours.
|
|
| Indonesian |
Aktivitas geomagnet diperkirakan berada pada level tenang dalam 24 jam yang akan datang.
|
|
| Detail information of Electron Flux | |
|---|---|
| English |
The electron flux was at low level on 31 August 2026 07UT - 01 September 2026 07UT.
The electron flux was on high level for the last 24 hours. |
| Indonesian |
Fluks elektron berada pada level rendah pada tanggal 31 Agustus 2026 07UT - 01 September 2026 07UT.
Fluks elektron berada pada level tinggi selama 24 jam terakhir. |
| Forecast of Electron Flux | |
| English |
High level of electron flux is expected for the next 24 hours.
|
| Indonesian |
Fluks elektron diperkirakan berada pada level tinggi dalam 24 jam yang akan datang.
|