Most Earthquake-Prone Countries: Nations That Shake the Most

Japan and Indonesia are the most earthquake-prone countries by sheer number of quakes, with China, Iran, Turkey, the Philippines, Peru, Chile, Mexico, the United States, Nepal and Pakistan also near the top of most lists. But which country is "most" earthquake-prone depends on whether you count how often the ground shakes, how big the quakes are, or how many people they kill.

On frequency, Japan records more felt earthquakes than almost anywhere, typically well over a thousand a year, and it experiences around a fifth of the world's magnitude 6 and larger quakes despite covering well under 1% of the land surface. Indonesia rivals or exceeds it on counts from the United States Geological Survey (USGS). On size, Chile holds the record for the largest earthquake ever measured, and the Pacific subduction zones produce nearly all quakes above magnitude 9. On human cost, China, Indonesia, Turkey, Iran, Pakistan and Haiti dominate, because large populations live in buildings that fail under shaking.

Three Ways to Rank Earthquake Risk

Every "most earthquake-prone" list quietly picks one of three yardsticks, which is why different sources disagree.

• Frequency counts every recorded event above a threshold. It favours long, active plate boundaries with dense seismograph networks, which is why Japan, Indonesia, Chile, Tonga and the Philippines top it.
• Magnitude looks at the largest events a country can produce. Only subduction megathrusts, where one plate slides beneath another along a fault hundreds of kilometres long, generate magnitude 9 quakes.
• Risk multiplies hazard by exposure and vulnerability: how many people live near the faults, and whether their homes stay standing. Here Iran, Pakistan, Nepal, Turkey and Haiti climb sharply, and Japan and Chile fall.

A country can rank high on one measure and low on another. Tonga shakes constantly but has about 100,000 people. Haiti produces few large quakes but lost a vast share of its capital in one. The fairest answer is to look at each country through the fault system that shakes it.

The Pacific Megathrusts: Japan, Indonesia, Chile

Around 80% of the world's largest earthquakes happen on the Pacific's Ring of Fire, where oceanic plates plunge beneath continents and island arcs. These faults lock for centuries, store strain, then slip tens of metres in a few minutes.

Japan

Four plates meet under Japan: the Pacific, Philippine Sea, Okhotsk (often treated as part of the North American Plate) and Amurian. On 11 March 2011 the Pacific Plate lurched beneath northeast Honshu in the Tōhoku earthquake, magnitude 9.0–9.1 according to the USGS. The tsunami it launched topped 40 metres in places, killed roughly 18,500 people, and caused the Fukushima Daiichi nuclear disaster. Earlier, the 1923 Great Kantō earthquake devastated Tokyo and Yokohama with about 105,000 deaths, and the 1995 Kobe (Great Hanshin) quake killed over 6,000. Seismologists now watch the Nankai Trough off southern Japan, which has ruptured in large quakes every 100 to 150 years.

Indonesia

Indonesia sits on the collision of the Indo-Australian, Eurasian, Pacific and Philippine Sea plates, with the Sunda megathrust running along the western coasts of Sumatra and the south of Java. On 26 December 2004 about 1,300 kilometres of that fault ruptured in the Sumatra–Andaman earthquake, magnitude 9.1 per the USGS (other estimates run to 9.3). The resulting Indian Ocean tsunami killed roughly 230,000 people in 14 countries, around 170,000 of them in Aceh. Further quakes followed at Nias in 2005, Yogyakarta in 2006, Palu in 2018 and Cianjur in 2022.

Chile

The Nazca Plate dives under South America at around 7 centimetres a year, and Chile's coast is one continuous subduction zone. The 22 May 1960 Valdivia earthquake, magnitude 9.5, remains the largest earthquake ever recorded; its tsunami killed people in Hawaii and Japan as well as Chile. Chile has had more magnitude 8 events in the past century than almost any other country, including Maule in 2010 (M8.8), Iquique in 2014 (M8.2) and Illapel in 2015 (M8.3).

The Alpide Belt: Turkey to China

The second great earthquake zone stretches from the Mediterranean across Iran and the Himalaya to Southeast Asia, where Africa, Arabia and India push north into Eurasia. These are mostly continental faults, shallow and running beneath crowded cities, which is why this belt accounts for so many of the deadliest quakes in history.

Turkey

The Anatolian block is being squeezed westward between the Arabian and Eurasian plates along two great strike-slip faults. The North Anatolian Fault produced a westward-marching series of quakes from 1939 onward, culminating in the İzmit earthquake of 17 August 1999 (M7.6, about 17,000 deaths). The East Anatolian Fault ruptured on 6 February 2023 in the Kahramanmaraş earthquake, magnitude 7.8, followed nine hours later by a magnitude 7.5 shock nearby. More than 50,000 people died in Turkey and several thousand more in northern Syria.

Iran

Almost all of Iran lies within the Arabia–Eurasia collision zone, and the country has suffered several quakes that each killed tens of thousands. The 1990 Manjil–Rudbar earthquake (M7.4) killed roughly 35,000 to 40,000. On 26 December 2003 a magnitude 6.6 quake struck directly beneath the city of Bam, destroying its mud-brick citadel and killing around 26,000 people, a toll far out of proportion to its size.

Nepal, Pakistan and the Himalaya

India is still moving north into Asia by about 4 to 5 centimetres a year, building the Himalaya. The Gorkha earthquake of 25 April 2015 (M7.8) killed about 9,000 people in Nepal and triggered avalanches on Everest. At the western end of the range, the Kashmir earthquake of 8 October 2005 (M7.6) killed around 86,000 people, most of them in Pakistan, many in schools and homes that collapsed on steep hillsides.

China

China has suffered the deadliest earthquakes on record. The 1556 Shaanxi earthquake is estimated to have killed about 830,000 people, many living in cave dwellings dug into loess cliffs. On 28 July 1976 the Tangshan earthquake (M7.5 per the USGS, 7.8 on the Chinese scale) flattened an industrial city of about a million; the official toll is about 242,000, and some estimates are far higher. The 12 May 2008 Sichuan (Wenchuan) earthquake, magnitude 7.9, left about 87,000 people dead or missing along the Longmenshan Fault.

The Americas Beyond the Andes

Mexico sits above the Cocos Plate's subduction under the North American Plate. The 19 September 1985 earthquake (M8.0) struck some 350 kilometres from Mexico City, yet killed around 10,000 people there, because the city is built on old lake-bed clays that amplified the shaking many times over. On the anniversary in 2017, a magnitude 7.1 quake near Puebla killed about 370. Peru's 1970 Ancash earthquake (M7.9) killed roughly 66,000 to 70,000, including most of the town of Yungay, buried by a debris avalanche from Huascarán.

The United States has the 1964 Alaska earthquake (M9.2), the second largest ever recorded, and California's San Andreas Fault, but death tolls stay low thanks to modern codes. Haiti, on the Enriquillo–Plantain Garden fault zone, is the opposite case, and the clearest illustration of why magnitude alone says little.

Chile 8.8, Haiti 7.0: Why Similar Quakes Kill So Differently

Six weeks apart in early 2010, two countries on the western rim of the Americas were struck by major earthquakes. The contrast is the strongest argument that earthquake risk is mostly about buildings.

The Maule earthquake released roughly 500 times as much energy as the Haiti quake, yet killed a tiny fraction of the number. Chile rewrote its seismic codes after the 1960 disaster, and its current standard, NCh433, is strictly enforced: engineers are legally liable for failures, and reinforced concrete shear walls are standard in apartment blocks. Most of Chile's 2010 deaths came from the tsunami, not collapsed buildings. Haiti's quake struck just 25 kilometres from Port-au-Prince, a city of unreinforced concrete-block homes built with no national code at all.

Japan shows the same pattern. After the 1978 Miyagi earthquake it introduced the 1981 shin-taishin standard, and in 2011 very few buildings collapsed from shaking; the tsunami did the killing. Turkey had modern codes too, updated in 1998, 2007 and 2018, but enforcement was the weak link. Repeated construction amnesties legalised hundreds of thousands of non-compliant buildings, and many of the 2023 collapses were blocks that would have survived had they been built to code. The damaged building in the photograph above, beside neighbours that stayed up, is what that difference looks like on a single street.

Countries Preparing for the Next Big One

The countries most prone to earthquakes are not getting any safer geologically; the faults that shook them will shake them again. Istanbul, about 20 kilometres from the unbroken Marmara segment of the North Anatolian Fault, faces a widely forecast major quake. Tokyo plans for a repeat of 1923, Kathmandu for a larger Himalayan rupture, and the Pacific Northwest of the United States for a Cascadia megathrust quake, last seen in January 1700. What differs is how ready each country is, and the places that have invested most in codes and warning systems are now among the most earthquake-resistant cities in the world.