Which cities in South Georgia and the South Sandwich Islands feel geomagnetic storms the strongest?
The higher the geomagnetic latitude, the stronger the effect. Among the listed cities the most exposed are Grytviken.
Geomagnetic storm forecast for South Georgia and the South Sandwich Islands
The geomagnetic field over South Georgia and the South Sandwich Islands is quiet: Kp 0.0 now, with the 72-hour peak near Kp 3.0. Across the country the effective exposure runs from about 3.0 at the least exposed cities to 3.0 at the most exposed.
Planetary Kp now0.0NOAA SWPC, live
72-hour peak3.0next 72 hours
Magnetic latitudes-46.7–-46.7°span across listed cities
Effective at peak3.0–3.0least → most exposed · estimate
South Georgia and the South Sandwich Islands spans geomagnetic latitudes -46.7°–-46.7°, so the same planetary storm is felt differently across it — higher magnetic latitudes get noticeably more. Open a city page for storm timing in its local time, its aurora threshold and wellbeing guidance.
Data: NOAA SWPC · GFZ Potsdam
Deep forecast · 72 hours
Next 72 hours over South Georgia and the South Sandwich Islands
Planetary Kp by 3-hour windows — identical worldwide; the local feel scales with each city's latitude.
Deep forecast · 72 hours
Kp by 3-hour windows · with uncertainty
CalmActiveStormSevereUncertainty
Forecast peak Kp 3 around Jul 18, 03 AM.
01 · Week ahead
Seven-day geomagnetic forecast
Official NOAA Kp forecast with a general wellbeing-risk estimate for weather-sensitive people.
Today 17 Jul
2.0
No storm
QuietGeneral risk14%
Sa 18 Jul
3.0
Unsettled field
QuietGeneral risk23%
Su 19 Jul
2.0
No storm
QuietGeneral risk14%
Mo 20 Jul
1.3
No storm
QuietGeneral risk11%
Tu 21 Jul
2.0
No storm · Estimate
QuietGeneral risk14%
We 22 Jul
4.0
Active field · Estimate
ActiveGeneral risk32%
Th 23 Jul
3.0
Unsettled field · Estimate
QuietGeneral risk23%
01 · Cities
Major cities in South Georgia and the South Sandwich Islands
Estimated effective exposure at the coming peak (Kp 3.0). Open a city for its local timing and aurora odds.
FAQ
South Georgia and the South Sandwich Islands: quick answers
Can you see auroras in South Georgia and the South Sandwich Islands?
It depends on latitude: South Georgia and the South Sandwich Islands's cities sit between geomagnetic -46.7° and -46.7°. The closer a city is to the auroral oval, the lower the Kp it needs — each city page shows its own threshold and tonight's estimate.
Is the forecast different across South Georgia and the South Sandwich Islands?
The Kp index is planetary — the same for all of South Georgia and the South Sandwich Islands. What differs is the effective local exposure (3.0–3.0 at the coming peak) and the timing, which each city page shows in its own timezone.
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