Fast Facts
1859 — The Carrington Event
The strongest solar storm on record, causing telegraph offices to spark and auroras visible in the tropics.
9 hrs — Quebec, 1989
A severe geomagnetic storm collapsed the Hydro-Québec grid, leaving 6 million people without power for 9 hours.
$565M — G5 Storm, 2024
A G5 storm disrupted GPS at the Midwest planting season, highlighting the critical need for backup timing.
Solar Flares
Sudden bursts of X-ray and radio energy from the Sun. They reach Earth at the speed of light — about 8 minutes — and can black out high-frequency radio on the daylit side. No advance warning is possible.
G1
Minor
Weak grid fluctuations
~1,700 per 11-yr cycle
NOAA's Geomagnetic Storm Scale
Flares, CMEs, and EMPs — What's Actually Happening
Three related but different phenomena get lumped together. Knowing the difference tells you how much warning you'll get and what's at risk.
G2
Moderate
Voltage alarms
~600 per 11-yr cycle
Coronal Mass Ejections (CMEs)
Billions of tons of magnetized plasma hurled from the Sun's corona. They take roughly 1–3 days to arrive, giving forecasters time to issue watches. When one hits Earth's magnetic field, it induces currents in long conductors — power lines, pipelines — that can overload transformers.
THE SCIENCE
G3
Strong
GPS degradation
~200 per 11-yr cycle
G4
Severe
Widespread voltage control problems
~100 per 11-yr cycle
EMP (Electromagnetic Pulse)
A high-altitude nuclear detonation produces three pulses: E1 (nanoseconds — fries semiconductors), E2 (lightning-like), and E3 (minutes-long, transformer-damaging). Solar storms only produce the E3-like effect; an EMP produces all three.
G5
Extreme
Grid collapse possible and transformer damage
~4 per 11-yr cycle
Most G5 storms will not catastrophically damage the grid — but Carrington-class events sit at the far end of G5, and studies put the odds of one at roughly 1–12% per decade. Ice-core records suggest Carrington-intensity storms recur roughly every 500 years, and the radiocarbon record shows even larger Miyake-class events striking every 1,000–3,000 years.
The Risks
Electric Grid
Transformer spares are limited and take months to a year to replenish. A Carrington-class storm could collapse the grid for weeks, costing up to $2.6 trillion.
Weak Link Starter Fix: Solar Generator
GPS & Satellites
Geomagnetic storms increase atmospheric drag, causing satellites to deorbit. This disrupts precision agriculture, aviation timing, and global navigation systems.
Weak Link Starter Fix: Hand-Crank NOAA Radio
Communications
HF radio blackouts can last for days. Cell and internet networks rely on grid power and GPS timing, making them vulnerable to cascading failures.
Weak Link Starter Fix: GMRS Radio Pair
Water & Fuel
Without power, water pumps and fuel pumps fail. ATMs and refrigeration stop working, creating a critical shortage of basic necessities.
Weak Link Starter Fix: Power Bank
Your Preparedness Plan
Preparedness isn't a bunker — it's two weeks of self-sufficiency, built one layer at a time. Focus on the physics of the threat and the practicality of your response.
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Water: 1 gallon per person per day for 14 days. Gravity filters are essential for long-term survival.
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Food: Non-perishable, high-calorie supplies you can actually eat. Focus on long-term shelf life.
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Backup Power: Power banks for day one, solar generators for week one, and vehicles above half tank.
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Communications: Hand-crank NOAA radio, GMRS, and ham radio for long-range contact.
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Faraday Protection: Faraday bags or lined galvanized steel cans for all electronics.
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Cash & Documents: Small bills and paper copies of vital documents in a fireproof bag.
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Medical: A first aid kit and a 30-day prescription buffer for critical medications.
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Family Plan: A written family plan with out-of-town contact details for safety.
What to Expect When a Big One Hits
T-minus 1–3 Days: The Watch
NOAA SWPC watch — charge everything, fill water, fuel, and cash. This is your critical window for preparation.
T-minus 15–60 Minutes: The Warning
L1 satellites confirm severity — unplug electronics, Faraday storage, and prepare for immediate grid instability.
Impact: Hours to Days
Blackouts, auroras, and unreliable GPS — most storms end here. Your plan must account for this disruption.
Worst case: Weeks or longer
Transformer damage and slow restoration — the two-week buffer matters. Stay calm and focused on your plan.
During the event — do this
- Unplug all appliances and electronics. Keep your radios, flashlights, and power banks ready. Your car may still run; keep it fueled.
Field-Tested Gear
Solar Generator
Capable of powering a refrigerator and essential electronics for up to 48 hours of continuous operation.
Faraday Bag Kit
Protects your electronics from E1 EMP pulses and E3 geomagnetic storms with a high-density, conductive lining.
Hand-Crank NOAA Radio
Provides critical weather alerts and emergency broadcasts without relying on a grid connection or batteries.
Gravity Water Filter
Removes bacteria, parasites, and heavy metals from water sources using a gravity-fed filtration system.
Emergency Food Supply
Non-perishable, high-calorie food with a 25-year shelf life, ready for immediate consumption without refrigeration.
GMRS Radio Pair
Provides long-range two-way communication for family coordination and emergency response during a blackout.
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