Eruption Physics Engine

Trigger an eruption.
Watch the earth respond.

Choose a VEI level, set the eruption type, and simulate pyroclastic flows, lava reach, ashfall zones, and blast radius on a real satellite map. From gentle effusive flows to VEI 8 supervolcanic cataclysms.

START SIMULATION โ†’FAMOUS ERUPTIONS
~1,500
active volcanoes on Earth
~50
erupt each year
800M+
people live within 100km of an active volcano
7
supervolcanoes capable of VEI 8
The Volcanic Explosivity Index

From gentle lava flows to civilization-ending events.

1
Gentle
2
Explosive
3
Severe
4
Cataclysmic
5
Paroxysmal
6
Colossal
7
Super-colossal
8
Mega-colossal
Preset Scenarios

History's most devastating eruptions.

Each scenario uses real eruption parameters. Load any into the simulator to see the destruction radius, pyroclastic reach, and ashfall zone.

VEI 8Caldera
Yellowstone Supervolcano
Last erupted 640,000 years ago. If it blows again, ashfall covers most of North America. Global winter for years. VEI 8 โ€” the maximum.
VEI 5Stratovolcano
Mount Vesuvius (79 AD)
Buried Pompeii and Herculaneum in hours. 16,000 dead. The pyroclastic surge moved at 700 km/h. Today, 3 million people live in the red zone.
VEI 6Caldera
Krakatoa (1883)
Explosion heard 4,800 km away. Generated 30m tsunamis. Lowered global temperature by 1.2ยฐC for five years. 36,000+ dead.
VEI 5Stratovolcano
Mount St. Helens (1980)
Lateral blast at 1,080 km/h. 600 kmยฒ destroyed. 57 dead. The eruption column rose 24 km in 15 minutes. Best-monitored eruption in history.
VEI 7Stratovolcano
Tambora (1815)
Largest eruption in recorded history. Caused the "Year Without a Summer" in 1816. Global crop failures. 71,000+ dead directly, hundreds of thousands from famine.
VEI 8Supervolcano
Toba (74,000 BP)
May have reduced human population to ~10,000 individuals. 2,800 kmยณ of material ejected. Volcanic winter lasted 6-10 years. The genetic bottleneck theory.
Simulation Output

What you'll see when it erupts.

๐ŸŒ‹
Eruption column
Height based on VEI level. Reaches the stratosphere at VEI 5+. Visible for hundreds of kilometers.
๐Ÿ”ฅ
Pyroclastic flows
Ground-hugging avalanches of hot gas and rock. Up to 700 km/h. Unsurvivable. Reach modeled by terrain and VEI.
๐ŸŒŠ
Lahars & mudflows
Volcanic debris mixed with water. Follow river valleys. Can travel 100+ km from the summit.
๐Ÿ”
Lava flows
Speed and reach depend on silica content and slope. From slow basaltic flows to fast felsic surges.
โ˜๏ธ
Ashfall zones
Prevailing wind carries ash hundreds of kilometers. Collapses roofs, chokes engines, contaminates water.
๐ŸŒก๏ธ
Climate impact
VEI 6+ eruptions inject sulfur aerosols into the stratosphere. Global cooling for 1-5 years after a major event.
Pricing

Free to explore. Pro to erupt everything.

Supervolcanoes and famous eruptions are free. Pro unlocks all 1,215 volcanoes plus advanced features.

Free
$0
  • โœ“ 1,215 volcanoes on interactive globe
  • โœ“ Supervolcano presets (Yellowstone, Toba, Campi Flegrei)
  • โœ“ Famous eruptions (Vesuvius, Krakatoa, St Helens, more)
  • โœ“ VEI-scaled ash zone visualization
  • โœ“ Click zones for ash depth & survival info
START SIMULATING
RECOMMENDED
Pro
$12.99/ year
or $29.99 lifetime
  • โ˜… Everything in Free
  • โ˜… Erupt ANY of 1,215 volcanoes
  • โ˜… Custom VEI override (erupt Vesuvius at VEI 8)
  • โ˜… Side-by-side eruption comparison
  • โ˜… CSV export of zone data
  • โ˜… Shareable simulation URLs with results
GO PRO โ†’

The earth is restless.

1,215 real volcanoes. VEI-scaled physics. Free supervolcano presets.

START SIMULATION โ†’Full DisasterMap โ†’