Description:
The correct answer is:
✅ Distant lightning flashes
Why?
Heat lightning is simply normal lightning from a distant thunderstorm (too far to hear thunder).
Key Facts:
Occurs horizon-to-horizon (storms 50+ miles away).
More common on hot, humid nights (when storms are frequent but distant).
Light scatters through the atmosphere, making flashes appear softer/orange.
Why Not the Others?
❌ Earth’s magnetic field: Causes auroras, not lightning.
❌ Seismic activity: Earthquakes don’t generate lightning (except rare "earthquake lights").
Fun Fact: The term "heat lightning" is a misnomer—it’s not caused by heat itself! 🌩️🔥
Safety Tip: If you can hear thunder, the storm is close enough to strike you! ⚡⚠️