The geomagnetic field over Serra is quiet. The planetary Kp index is 2.3 — about 1.6 as effective local exposure at this latitude — and the next 72 hours should stay comfortable, peaking near Kp 3.0 around Sat 12:00 AM local time.
Serra sits at geomagnetic latitude -12.4° — and that latitude, not the city itself, decides how strongly a storm is felt: we estimate local exposure at ×0.67 of the planetary Kp. Auroras become plausible here from about Kp 9. All times on this page are shown in Serra local time (UTC-3).
Data: NOAA SWPC · GFZ Potsdam
Official 3-hour NOAA windows relabelled to Serra's clock (UTC-3). The curve is planetary — the local feel scales with latitude.
Forecast peak Kp 3 around Jul 18, 12 AM.
When to get things done and when to rest. The marker shows now (21:00).
Official NOAA Kp forecast with a general wellbeing-risk estimate for weather-sensitive people.
A comfortable window. Good time for demanding tasks, workouts and travel plans.
General population-level guidance, not medical advice. Reactions are individual — a symptom diary shows what actually affects you.
Same storm, slightly different latitude — open a neighbouring page for its local timing and aurora odds.
No — the field is quiet. Kp is 2.3 right now, and the next 72 hours peak near Kp 3.0 around Sat 12:00 AM local time. Kp 5 or higher would count as a storm.
Realistically no. At geomagnetic latitude -12.4° the auroral oval stays far away even in strong storms — a sighting would take a once-in-decades event.
The Kp index itself is planetary — one number for the whole Earth. What changes is how strongly a place feels it: at Serra's geomagnetic latitude (-12.4°) we estimate the effective exposure at about ×0.67 of the planetary value.
Research is mixed, but many weather-sensitive people report headaches, fatigue or restless sleep during elevated activity. It is a possible correlation, not a diagnosis — the forecast above shows when the sensitive windows are, and a symptom journal shows whether they matter for you.
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