Space weather science

When the Sun
Strikes Earth

Geomagnetic storms occur when the Sun's charged particles slam into Earth's magnetosphere, rippling through our bodies, grids, satellites and devices.

KP INDEX — REALTIME SIMULATION

Storm classification

The G-Scale: 5 Levels of Intensity

NOAA classifies geomagnetic storms G1–G5 based on the Kp index. Select a level to explore its reach and consequences.

Kp 5–6
G1 — Minor Storm
~1700 events per 11-year cycle

Earth's magnetosphere

How the Shield Works

Earth's magnetic field deflects most solar wind. During a storm, a powerful CME temporarily compresses the magnetosphere and injects charged particles deep into the system.

Sun CME Bow shock Magnetotail Van Allen belts Earth Aurora zone N

Impact analysis

What Gets Disrupted

🧠
Headaches & Migraines
Fluctuations in the geomagnetic field may influence serotonin and melatonin production, triggering headaches in sensitive individuals.
SEVERITY
😴
Sleep Disruption
Storms reduce melatonin levels and disrupt circadian rhythms. Studies show increased sleep disorders correlated with elevated Kp indices.
SEVERITY
💓
Cardiovascular Stress
Research links severe geomagnetic storms to elevated blood pressure and increased incidence of cardiac arrhythmias and myocardial infarctions.
SEVERITY
😓
Fatigue & Brain Fog
Altered electromagnetic environment affects cellular energy production. Many people report unexplained exhaustion and difficulty concentrating during peak storm days.
SEVERITY
🧬
Mood & Anxiety
The pineal gland is magnetosensitive. Geomagnetic disturbances correlate with increases in hospital admissions for depression and anxiety.
SEVERITY
🦅
Animal Disorientation
Birds, whales and bees rely on magnetoreception for navigation. Storms cause mass strandings, whale beachings and colony collapses in sensitive species.
SEVERITY
🛰️
Satellite Damage
High-energy particles in the Van Allen belts intensify during storms, degrading solar panels, corrupting onboard memory and permanently damaging sensors.
SEVERITY
📡
GPS Errors
Ionospheric disturbances corrupt the time-of-flight signal used in GPS. Errors can reach 50–100 meters in moderate storms, disabling precision agriculture, aviation and shipping.
SEVERITY
⚡
Power Grid Collapse
Geomagnetically induced currents (GICs) flow through long transmission lines, overheating and destroying transformers. The 1989 Quebec blackout left 6 million without power for 9 hours.
SEVERITY
📻
Radio Blackouts
HF radio communications fail due to D-region absorption. Aviation, maritime and emergency services using HF experience complete communication loss on sunlit side of Earth.
SEVERITY
🛢️
Pipeline Corrosion
GICs accelerate electrochemical corrosion in steel pipelines. Oil and gas operators must increase cathodic protection current during storms to prevent catastrophic failure.
SEVERITY
🖥️
Computer Hardware
Single-event upsets (SEUs) cause bit flips in RAM and flash memory from high-energy particles. Avionics at altitude are especially vulnerable due to thinner atmospheric shielding.
SEVERITY

Historical record

Great Storms of the Past

The most powerful events left permanent marks on civilization and technology.

☀️
September 1–2, 1859
The Carrington Event — G5+
The most powerful geomagnetic storm in recorded history. Telegraph operators received shocks; systems operated autonomously without power. Auroras were visible as far south as the Caribbean. A Carrington-scale event today would cause $1–2 trillion in damage.
⚡
March 13–14, 1989
The Quebec Blackout — G5
Hydro-Québec's entire power grid collapsed in 92 seconds. Six million people lost power for up to 9 hours. Transformer damage required weeks to repair. Several satellites experienced technical anomalies.
📡
October 28–November 4, 2003
The Halloween Storms — G5
A series of X-class solar flares triggered multiple G5 storms. Two GOES weather satellites were damaged, 47 transformers were affected in South Africa, and airlines were rerouted. NOAA's GOES-11 lost a key instrument permanently.
🌍
May 10–11, 2024
Strongest Storm in 20 Years — G5
A series of X-class flares produced a G5 storm visible worldwide. Auroras were photographed at latitudes as low as Texas, Florida and even Mexico. SpaceX Starlink reported elevated satellite drag. No major infrastructure damage occurred due to improved forecasting and grid hardening.

Preparedness guide

What You Can Do

Proactive measures significantly reduce risk during geomagnetic storm events.

HUMAN HEALTH
Protect Your Body
  • Track NOAA Space Weather alerts and plan rest during G3+ events
  • Prioritise sleep hygiene — blackout curtains and screen curfews reduce melatonin disruption
  • Grounding ("earthing") may counteract electromagnetic stress for sensitive individuals
  • People with cardiac devices should consult cardiologists during G4–G5 storms
  • Increase hydration and reduce stimulant intake during active storm periods
ELECTRONICS
Protect Your Technology
  • Use surge protectors with adequate joule ratings on all critical equipment
  • Back up critical data before forecasted G4–G5 events
  • Unplug devices during the storm peak if you're in a high-risk grid area
  • Faraday cages protect backup electronics from extreme events
  • Aviation operators should switch to VHF/SATCOM when HF radio degrades
  • GPS-critical operations should include WAAS corrections or dual-frequency receivers
MONITORING
Stay Informed
  • NOAA Space Weather Prediction Center issues 1–3 day storm forecasts
  • ESA's Space Weather Service provides European alerts and data
  • Kp index ≥ 5 indicates a minor storm; ≥ 7 warrants grid operator intervention
  • Apps like SpaceWeatherLive give real-time Kp readings with push notifications
  • Follow solar cycle 25 activity — peak expected around 2025