The 10 Most Powerful Earthquakes Ever Recorded

Earthquakes have shaped civilizations, altered coastlines, and changed the course of history. Here are the ten most powerful ever recorded by modern instruments.

1. Valdivia, Chile — May 22, 1960 (M9.5)

The largest earthquake ever recorded struck southern Chile with a rupture zone stretching over 1,000 km. It caused tsunamis up to 25 meters high that devastated coastal communities across the Pacific. The death toll is estimated at 1,000-6,000. The earthquake triggered the eruption of the Cordon Caulle volcano. It caused an estimated $800 million in damage (1960 dollars). The event confirmed the theory of plate tectonics by showing how subduction zones produce the largest earthquakes.

2. Prince William Sound, Alaska — March 27, 1964 (M9.2)

Lasting nearly five minutes, the Good Friday Earthquake devastated Anchorage and triggered tsunamis along the Alaskan, Canadian, and US west coasts. Some areas experienced vertical ground displacement of 15 meters. The tsunami killed people as far away as California. 131 people died, and damage reached $311 million. The earthquake revealed much about subduction zone mechanics and led to major advances in earthquake science.

3. Sumatra, Indian Ocean — December 26, 2004 (M9.1)

The third largest earthquake ever recorded triggered a devastating tsunami that killed approximately 230,000 people across 14 countries, making it one of the deadliest natural disasters in history. The rupture stretched 1,300 km along the ocean floor. Waves reached 30 meters in Aceh, Indonesia. The earthquake was so powerful it shortened the day by 2.68 microseconds and changed Earth's axis by about 7 cm.

4. Tohoku, Japan — March 11, 2011 (M9.1)

The most powerful earthquake ever recorded in Japan triggered a massive tsunami with waves up to 40 meters. It caused the Fukushima Daiichi nuclear disaster, the worst nuclear accident since Chernobyl. Nearly 20,000 people died. The earthquake moved Honshu island 2.4 meters east and shifted Earth's axis by 10-25 cm. It exposed critical flaws in Japan's tsunami preparedness and nuclear safety regulations.

5. Kamchatka, Russia — November 4, 1952 (M9.0)

This earthquake generated a tsunami that caused damage across the Pacific, including Hawaii where waves reached 13 meters at some locations. No deaths were reported in Russia, but livestock was lost. The event led to the creation of the Pacific Tsunami Warning Center.

6. Chile — February 27, 2010 (M8.8)

The sixth largest earthquake ever recorded struck off the coast of central Chile, killing over 500 people and causing $30 billion in damage. It moved the city of Concepcion 3 meters west. The earthquake triggered a small tsunami that reached Japan and caused minor damage.

What Makes These Earthquakes So Powerful?

All of these earthquakes occurred at subduction zones, where one tectonic plate slides beneath another. These boundaries can accumulate enormous strain over centuries before releasing it in massive ruptures. The largest earthquakes require long fault segments that slip simultaneously. Use our historical search to explore past seismic events in any region.