The 1960 Valdivia earthquake in Chile — magnitude 9.5 — is the strongest earthquake ever recorded, more than 10 times more powerful than the second-strongest.
Quick answer: 1. 1960 Valdivia Earthquake — Chile, 2. 1964 Great Alaska Earthquake — USA, 3. 2004 Sumatra-Andaman Earthquake — Indonesia, 4. 2011 Tōhoku Earthquake — Japan, 5. 1952 Kamchatka Earthquake — Russia, 6. 2025 Kamchatka Earthquake — Russia, 7. 2010 Maule Earthquake — Chile, 8. 1906 Ecuador-Colombia Earthquake, 9. 1965 Rat Islands Earthquake — Alaska, USA, 10. 1950 Assam-Tibet Earthquake — India/China.
Earthquakes above magnitude 8.0 are rare and catastrophic events, releasing energy on a scale that's difficult to comprehend. A magnitude 9.0 earthquake releases about 1,000 times more energy than a magnitude 7.0 — the difference between a serious quake and a planet-altering event. This list ranks the strongest earthquakes ever recorded since modern seismological instruments began measuring them in the early 20th century. All are magnitude 8.6 or higher, and all occurred along subduction zones — the tectonic plate boundaries that produce the world's largest seismic events.
The strongest earthquake ever recorded, striking off the coast of south-central Chile on May 22, 1960. The megathrust quake generated a Pacific-wide tsunami that killed up to 6,000 people and left 2 million homeless. Known as the Great Chilean Earthquake, it released energy equivalent to about 20,000 Hiroshima bombs.
The second-largest earthquake ever recorded, occurring on Good Friday in Prince William Sound, Alaska. The quake and its ensuing tsunami killed 131 people and caused $2.3 billion in damage (2024-adjusted). It remains the most powerful earthquake ever recorded in North America.
The third-largest earthquake ever recorded triggered a devastating Indian Ocean tsunami that killed more than 280,000 people across 14 countries, making it one of the deadliest natural disasters in history. The rupture was one of the longest ever observed at roughly 1,200 km.
The Great East Japan Earthquake struck off the coast of Honshu on March 11, 2011, generating a massive tsunami that overwhelmed coastal defenses and caused the Fukushima Daiichi nuclear disaster. More than 15,000 people died and 130,000 were displaced.
The first recorded magnitude 9.0 earthquake, striking off the coast of the Kamchatka Peninsula. It triggered a powerful tsunami that struck Hawaii, causing over $1 million in damage, though no fatalities were reported due to the remote location.
A magnitude 8.8 earthquake struck the same Kamchatka region in 2025, preceded by dozens of large foreshocks including a M7.4 ten days earlier. It is tied as the sixth-largest recorded earthquake and occurred in a well-monitored remote zone.
Striking offshore near the city of Quirihue, this magnitude 8.8 earthquake killed 523 people and destroyed more than 370,000 homes. It was the second major Chilean megathrust event in 50 years and prompted major building code revisions.
The largest earthquake ever recorded in the Caribbean region, striking off the coast of Esmeraldas, Ecuador in 1906. It generated a strong tsunami that killed an estimated 1,500 people and was felt as far north as San Francisco.
Located near the Rat Islands of Alaska's Aleutian chain, this magnitude 8.7 earthquake generated a tsunami reportedly 35 feet high. Despite its extreme power, its remote location minimized casualties.
The largest earthquake ever recorded in a continental collision zone, measuring 8.6 and centered in the Himalayas near the India-China border. It produced intense shaking, sandblows, large landslides, and ground cracks across the region. 780 people died.
| # | Name | Location | Date | Magnitude | Depth | Tsunami |
|---|---|---|---|---|---|---|
| 1 | 1960 Valdivia Earthquake — Chile | Biobío, Chile | May 22, 1960 | 9.5 | 33 km | Yes (Pacific-wide) |
| 2 | 1964 Great Alaska Earthquake — USA | Prince William Sound, Alaska, USA | March 27, 1964 | 9.2 | 25 km | Yes (local and Pacific) |
| 3 | 2004 Sumatra-Andaman Earthquake — Indonesia | Sumatra, Indonesia | December 26, 2004 | 9.1 | 30 km | Yes (Indian Ocean) |
| 4 | 2011 Tōhoku Earthquake — Japan | Tōhoku, Japan | March 11, 2011 | 9.1 | 29 km | Yes (Pacific-wide) |
| 5 | 1952 Kamchatka Earthquake — Russia | Kamchatka, Russia | November 4, 1952 | 9 | 30 km | Yes (Pacific) |
| 6 | 2025 Kamchatka Earthquake — Russia | Kamchatka, Russia | 2025 | 8.8 | Deep | Yes (local) |
| 7 | 2010 Maule Earthquake — Chile | Biobío, Chile | February 27, 2010 | 8.8 | 35 km | Yes (local and Pacific) |
| 8 | 1906 Ecuador-Colombia Earthquake | Esmeraldas, Ecuador (Ecuador-Colombia border) | January 31, 1906 | 8.8 | 20 km | Yes (Pacific) |
| 9 | 1965 Rat Islands Earthquake — Alaska, USA | Rat Islands, Alaska, USA | February 4, 1965 | 8.7 | 30 km | Yes (local) |
| 10 | 1950 Assam-Tibet Earthquake — India/China | Arunachal Pradesh, India / Tibet | August 15, 1950 | 8.6 | 15 km | No (inland) |
Earthquakes are ranked by moment magnitude (Mw), the standard scale used by seismologists to measure earthquake size (rank 1 = largest magnitude). Ties are broken by date (oldest first). Data comes from the United States Geological Survey (USGS), which maintains the authoritative catalog of the 20 largest earthquakes worldwide since 1900. Only instrumentally recorded earthquakes are included — historical earthquakes that lack instrumental magnitude readings are excluded. Magnitude is logarithmic, meaning each whole-number increase represents roughly 32 times more energy release.
The 1960 Valdivia earthquake in Chile, with a magnitude of 9.5, is the strongest earthquake ever recorded by instruments. It occurred on May 22, 1960, along the Peru-Chile subduction zone.
The moment magnitude scale is logarithmic, meaning each whole-number increase represents about 32 times more energy release. A magnitude 9.0 earthquake releases roughly 1,000 times more energy than a magnitude 7.0.
This list includes only earthquakes that were recorded by modern seismological instruments. Historical earthquakes before the 1900s lack accurate instrumental magnitude readings, so their magnitudes are estimated from historical accounts and geological evidence.
The largest earthquakes occur almost exclusively along subduction zones — where one tectonic plate slides beneath another — particularly around the Pacific Ring of Fire. The largest events typically occur in Chile, Alaska, Indonesia, Japan, and the Kamchatka Peninsula.