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Country forecast

Geomagnetic storm forecast for Brazil

No storm Capital: Brasília 2345 citiesEstimate

The geomagnetic field over Brazil is quiet: Kp 2.3 now, with the 72-hour peak near Kp 3.0. Across the country the effective exposure runs from about 2.0 at the least exposed cities to 2.3 at the most exposed.

Planetary Kp now2.3NOAA SWPC, live
72-hour peak3.0next 72 hours
Magnetic latitudes-23.5–11.7°span across listed cities
Effective at peak2.0–2.3least → most exposed · estimate

Brazil spans geomagnetic latitudes -23.5°–11.7°, 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 Brazil

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 16 Jul
3.3
Unsettled field
Quiet
General risk26%
Fr 17 Jul
2.0
No storm
Quiet
General risk14%
Sa 18 Jul
3.0
Unsettled field
Quiet
General risk23%
Su 19 Jul
1.7
No storm
Quiet
General risk13%
Mo 20 Jul
2.0
No storm · Estimate
Quiet
General risk14%
Tu 21 Jul
2.0
No storm · Estimate
Quiet
General risk14%
We 22 Jul
4.0
Active field · Estimate
Active
General risk32%
01 · Cities

Major cities in Brazil

Estimated effective exposure at the coming peak (Kp 3.0). Open a city for its local timing and aurora odds.

São Paulo 2.1 -15.3° magRio de Janeiro 2.1 -14.9° magBelo Horizonte 2.0 -11.9° magSalvador 1.8 -5.4° magFortaleza 1.8 3.8° magManaus 1.8 5.8° magBrasília 1.9 -7.5° magCuritiba 2.1 -17° magRecife 1.7 -0.8° magGoiânia 1.9 -8.3° magBelém 1.8 6.8° magPorto Alegre 2.3 -21.5° magGuarulhos 2.1 -15.3° magMaceió 1.7 -2.4° magCampinas 2.1 -14.7° magSão Luís 1.8 5.5° magCampo Grande 2.0 -11.8° magNatal 1.7 1.4° magTeresina 1.7 2.8° magNova Iguaçu 2.1 -14.8° magDuque de Caxias 2.1 -14.8° magJoão Pessoa 1.7 0.1° magSão Bernardo do Campo 2.1 -15.5° magSão José dos Campos 2.1 -15° mag
02 · All pages

All cities in Brazil

Showing the 200 most populous of 2345 cities.

FAQ

Brazil: quick answers

Which cities in Brazil feel geomagnetic storms the strongest?

The higher the geomagnetic latitude, the stronger the effect. Among the listed cities the most exposed are Rio Grande, Pelotas, Viamão.

Can you see auroras in Brazil?

It depends on latitude: Brazil's cities sit between geomagnetic -23.5° and 11.7°. 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 Brazil?

The Kp index is planetary — the same for all of Brazil. What differs is the effective local exposure (2.0–2.3 at the coming peak) and the timing, which each city page shows in its own timezone.

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