Magnetic storms in Sanmenxia

Magnetic storm in Sanmenxia today: planetary Kp = 0.3 (G0). Over the last 7 days the maximum Kp above Sanmenxia reached 4.7 (G0); storm days (G1+) this week: 0.

Sanmenxia sits at geomagnetic latitude 25.5°. The nearest magnetic observatory continuously recording the field is Irkutsk (Patrony), 2017 km away. Population 669,307.

Magnetic storms and health of Sanmenxia residents: at Kp ≥ 5 weather-sensitive people may experience pressure swings, headaches, sleep issues. Especially pensioners and people with hypertension should watch the forecast. During a storm — hydrate more, avoid alcohol and strong coffee, avoid intense physical load.

Technical consequences for Sanmenxia at G3+: GPS, HF radio and precise positioning systems may glitch. Drivers on long routes should watch the forecast for the next 24–72 hours. Data source: NOAA Space Weather Prediction Center, refreshed every 10 minutes.

Over Sanmenxia during the last 24 hours. Kp reached a maximum of 3.3 around 08:00 local time and dipped to 1.0. The planetary trend over the past 6 hours is falling — the magnetosphere near Sanmenxia is in the recovery phase. So far this month the planet has logged no G1+ storm days with a G1 or stronger geomagnetic storm.

Aurora visibility threshold for Sanmenxia. At a geomagnetic latitude of 25.5°, the minimum Kp giving a realistic chance of visible auroras above Sanmenxia is about Kp ≥ 9. The current equatorial Dst index is 0 nT — the magnetosphere is in a quiet phase. Dst complements Kp by showing how long and how deep a storm's main phase has been — useful context when checking whether auroras are likely tonight.

Weather and atmospheric pressure in Sanmenxia right now. Temperature +22.3°C, atmospheric pressure 724.7 mm Hg (966.2 hPa), cloud cover 3%, humidity 30%, wind 21.4 km/h. During G1+ geomagnetic storms, swings in atmospheric pressure tend to amplify symptoms for weather-sensitive people: those with hypertension often notice blood-pressure spikes, and readings below 1000 hPa combined with Kp ≥ 5 frequently bring headaches and fatigue. That is why the Sanmenxia page shows both indicators side by side. Weather data from Open-Meteo (CC BY).

Aurora viewing window for Sanmenxia tonight. Sunset is at 00:21 local time, sunrise tomorrow at 10:42. Moon phase — waning gibbous with 98% disk illumination. The Moon is close to full tonight, so moonlight will be strong and faint auroras will be harder to spot — wait for Kp ≥ 6 or pick a darker site..