Space weather today in Sha Tin

Space weather in Sha Tin today

G1 minor geomagnetic storm forecast (NOAA, 2026-11-06 03:18 UTC). The planetary Kp index is 2 now and forecast to peak at Kp 5 in the next 24 hours. NOAA gives a 35% chance of R1–R2 radio blackouts today, 10% for R3 or stronger, and 5% for a solar radiation storm.

Radio: solar flares only black out HF radio on the half of Earth facing the Sun. The Sun is 50° above the horizon in Sha Tin now (11:22 am local time). The biggest flare in the past 24 hours was M3.5 at 2:33 am local time, while Sha Tin was on the night side. HF radio is mainly hit by daytime solar flares (radio blackouts).

GPS and power: Near the magnetic equator, GPS signals can flicker after sunset (equatorial scintillation), most often near solar maximum and around the equinoxes. Power grid effects are very unlikely at this latitude.

Aurora chance tonight in Sha Tin

Unlikely tonight (Kp 4.7 forecast; Sha Tin needs an extreme Kp 9 storm). At 13.2° N geomagnetic, Sha Tin is far from the auroral oval; only extreme Kp 9 (G5) storms such as May 2024 bring the aurora into view, mostly to cameras.

At the forecast Kp 5, the aurora's visible edge stays about 4,440 km north of Sha Tin.

NOAA 3-day space weather forecast

Chances that NOAA issues each level somewhere on Earth. Radio blackouts only affect the sunlit side; geomagnetic storms are global but strongest near the poles.

Strongest solar flares this week

C-class and stronger flares from the past 7 days, local time in Sha Tin.

• M3.5 flare peak Fri 2:33 am, R1 minor radio blackout
• C2.9 flare peak Fri 5:34 am
• C2.5 flare peak Fri 8:24 am
• C2.2 flare peak Thu 1:34 am
• C1.3 flare peak Fri 6:31 am
• C1.2 flare peak Fri 6:21 am
• C1.2 flare peak Wed 2:54 pm
• C1.1 flare peak Fri 1:00 am
• C1.1 flare peak Wed 6:39 am
• C1.1 flare peak Sun 8:36 pm

What the scales mean

Space weather is the Sun's effect on Earth. NOAA rates it on three 1–5 scales. R (radio blackouts) comes from solar flares: X-rays reach Earth in 8 minutes and disrupt HF radio on the sunlit side for minutes to hours. S (solar radiation storms) comes from energetic protons a few hours later, a hazard for satellites, polar flights and astronauts. G (geomagnetic storms) comes 1–3 days after a coronal mass ejection or a fast solar-wind stream hits the magnetic field: it drives the aurora and can upset GPS, HF radio and power grids.

The Kp index (0–9) measures geomagnetic activity in 3-hour blocks: Kp 5 is a G1 storm, Kp 6 G2, Kp 7 G3, Kp 8 G4 and Kp 9 G5. Flares are classed A, B, C, M and X by peak X-ray brightness, each class ten times the one before; M1 flares cause R1 blackouts and X1 flares R3.

Space weather for nearby cities

• Space weather Wong Tai Sin
• Space weather Kwai Chung
• Space weather Kowloon City
• Space weather Sham Shui Po
• Space weather Tsuen Wan
• Space weather Jordan
• Space weather Tseung Kwan O
• Space weather Victoria

More sky pages

• Space weather today (worldwide)
• Aurora forecast
• Meteor showers

Guides

• Solar Flares and Geomagnetic Storms Explained: R, S and G Scales
• What Kp Index Do You Need to See the Northern Lights?
• How to See the Northern Lights Tonight: A Practical Guide
• GPS Jamming and Spoofing Explained: How Maps Detect It