The Ring of Fire is a 40,000-kilometer (25,000-mile), horseshoe-shaped zone around the Pacific Ocean basin where about 90% of the world's earthquakes and 75% of its volcanic activity occur.

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The Ring of Fire is a 40,000-kilometer (25,000-mile), horseshoe-shaped zone around the Pacific Ocean basin where about 90% of the world's earthquakes and 75% of its volcanic activity occur. 

Key Characteristics of the Ring of Fire

Path: It stretches from Chile and New Zealand in the south, up the western coasts of South and North America, across the Aleutian Islands, and down through Japan, the Philippines, and Indonesia. 
Tectonic Plate Boundaries: The zone sits along boundaries where massive slabs of Earth's crust—such as the Pacific, Nazca, Cocos, and Philippine plates—meet larger continental plates. 
Activity: It produces most of the planet's most violent seismic events and hosts over 450 active and dormant volcanoes. 

Why Earthquakes Happen Here

Subduction Zones: Along most of the ring, heavy oceanic plates slide underneath lighter continental plates or other oceanic plates in areas called subduction zones. 
Friction and Tension: As these plates grind, crash, and dive past each other, they get stuck. Tension builds up over time until the rock suddenly slips or breaks, releasing massive amounts of energy as earthquakes. 
Transform Faults: In some places, like the border between the Pacific and North American plates (such as the San Andreas Fault), plates slide horizontally past one another, building up severe crustal tension that also triggers frequent earthquakes. 
Depth: Earthquakes here range from shallow tremors near the surface to deep earthquakes down to 700 kilometers (430 miles) as the sunken plate descends into the mantle. 

You can learn more about these seismic hazards through the U.S. Geological Survey. 

Would you like to know about a specific major earthquake or a particular country along the Ring of Fire?

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  National Geographic Society

  Plate Tectonics and the Ring of Fire

  Jul 16, 2026 — The Ring of Fire is a string of volcanoes and seismic activity around the edges of the Pacific Ocean. It's caused by plate tectoni...

  
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  National Geographic Society

  Ring of Fire - National Geographic Society

  Jun 17, 2025 — The Ring of Fire, also referred to as the Circum-Pacific Belt, is a path along the Pacific Ocean characterized by active volcanoes...

  
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  USGS (.gov)

  What is the "Ring of Fire"? | U.S. Geological Survey - USGS.gov

  Jul 27, 2026 — Most earthquakes and volcanic eruptions do not strike randomly but occur in specific areas, such as along plate boundaries. One su...

  

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Ring of Fire

National Geographic Society

https://www.nationalgeographic.org › encyclopedia › rin...

Jun 17, 2025 — The abundance of volcanoes and earthquakes along the Ring of Fire is caused by the amount of movement of tectonic plates in the area. Along much ...