The Top 10 Largest Nuclear Explosions, Visualized
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The Top 10 Largest Nuclear Explosions, Visualized

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infographic comparing the top 10 largest nuclear explosions

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The Top 10 Largest Nuclear Explosions, Visualized

Just how powerful are nuclear explosions?

The U.S.’ Trinity test in 1945, the first-ever nuclear detonation, released around 19 kilotons of explosive energy. The explosion instantly vaporized the tower it stood on and turned the surrounding sand into green glass, before sending a powerful heatwave across the desert.

As the Cold War escalated in the years after WWII, the U.S. and the Soviet Union tested bombs that were at least 500 times greater in explosive power. This infographic visually compares the 10 largest nuclear explosions in history.

The Anatomy of a Nuclear Explosion

After exploding, nuclear bombs create giant fireballs that generate a blinding flash and a searing heatwave. The fireball engulfs the surrounding air, getting larger as it rises like a hot air balloon.

As the fireball and heated air rise, they are flattened by cooler, denser air high up in the atmosphere, creating the mushroom “cap” structure. At the base of the cloud, the fireball causes physical destruction by sending a shockwave moving outwards at thousands of miles an hour.

anatomy of a nuclear explosion's mushroom cloud

A strong updraft of air and dirt particles through the center of the cloud forms the “stem” of the mushroom cloud. In most atomic explosions, changing atmospheric pressure and water condensation create rings that surround the cloud, also known as Wilson clouds.

Over time, the mushroom cloud dissipates. However, it leaves behind radioactive fallout in the form of nuclear particles, debris, dust, and ash, causing lasting damage to the local environment. Because the particles are lightweight, global wind patterns often distribute them far beyond the place of detonation.

With this context in mind, here’s a look at the 10 largest nuclear explosions.

#10: Ivy Mike (1952)

In 1952, the U.S. detonated the Mike device—the first-ever hydrogen bomb—as part of Operation Ivy. Hydrogen bombs rely on nuclear fusion to amplify their explosions, producing much more explosive energy than atomic bombs that use nuclear fission.

Weighing 140,000 pounds (63,500kg), the Ivy Mike test generated a yield of 10,400 kilotons , equivalent to the explosive power of 10.4 million tons of TNT. The explosion was 700 times more powerful than Little Boy , the bomb dropped on Hiroshima in 1945.

#9: Castle Romeo (1954)

Castle Romeo was part of the Operation Castle series of U.S. nuclear tests taking place on the Marshall Islands. Shockingly, the U.S. was running out of islands to conduct tests, making Romeo the first-ever test conducted on a barge in the ocean.

At 11,000 kilotons, the test produced more than double its predicted explosive energy of 4,000 kilotons. Its fireball, as seen below, is one of the most iconic images ever captured of a nuclear explosion.

iconic image of the castle romeo nuclear explosion of 1954

#8: Soviet Test #123 (1961)

Test #123 was one of the 57 tests conducted by the Soviet Union in 1961. Most of these tests were conducted on the Novaya Zemlya archipelago in Northwestern Russia. The bomb yielded 12,500 kilotons of explosive energy, enough to vaporize everything within a 2.1 mile (3.5km) radius.

#7: Castle Yankee (1954)

Castle Yankee was the fifth test in Operation Castle. The explosion marked the second-most powerful nuclear test by the U.S.

It yielded 13,500 kilotons , much higher than the predicted yield of up to 10,000 kilotons. Within four days of the blast, its fallout reached Mexico City, roughly 7,100 miles (11,400km) away.

#6: Castle Bravo (1954)

Castle Bravo, the first of the Castle Operation series, accidentally became the most powerful nuclear bomb tested by the U.S.

Due to a design error, the explosive energy from the bomb reached 15,000 kilotons , two and a half times what was expected. The mushroom cloud climbed up to roughly 25 miles (40km).

As a result of the test, an area of 7,000 square miles was contaminated, and inhabitants of nearby atolls were exposed to high levels of radioactive fallout. Traces of the blast were found in Australia, India, Japan, and Europe.

#5, #4, #3: Soviet Tests #173, #174, #147 (1962)

In 1962, the Soviet Union conducted 78 nuclear tests, three of which produced the fifth, fourth, and third-most powerful explosions in history. Tests #173, #174, and #147 each yielded around 20,000 kilotons . Due to the absolute secrecy of these tests, no photos or videos have been released.

#2: Soviet Test #219 (1962)

Test #219 was an atmospheric nuclear test carried out using an intercontinental ballistic missile (ICBM), with the bomb exploding at a height of 2.3 miles (3.8km) above sea level. It was the second-most powerful nuclear explosion, with a yield of 24,200 kilotons and a destructive radius of ~25 miles (41km).

#1: Tsar Bomba (1961)

Tsar Bomba, also called Big Ivan , needed a specially designed plane because it was too heavy to carry on conventional aircraft. The bomb was attached to a giant parachute to give the plane time to fly away.

The explosion, yielding 50,000 kilotons , obliterated an abandoned village 34 miles (55km) away and generated a 5.0-5.25 magnitude earthquake in the surrounding region. Initially, it was designed as a 100,000 kiloton bomb, but its yield was cut to half its potential by the Soviet Union. Tsar Bomba’s mushroom cloud breached through the stratosphere to reach a height of over 37 miles (60km), roughly six times the flying height of commercial aircraft.

The two bombs dropped on Hiroshima and Nagasaki had devastating consequences, and their explosive yields were only a fraction of the 10 largest explosions. The power of modern nuclear weapons makes their scale of destruction truly unfathomable, and as history suggests, the outcomes can be unpredictable.

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Misc

Vintage Viz: China’s Export Economy in the Early 20th Century

This pie chart, circa 1914, is a fascinating breakdown of China’s export economy just prior to World War I.

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Vintage Viz: China’s Export Economy in the Early 20th Century

“The past is a foreign country; they do things differently there” is the oft-quoted first line of L.P. Hartley’s 1953 novel, The Go-Between .

A statement that is as profound as it is banal. In other words, when we do history, we’re a bit like tourists. If we really want to understand the past, we have to think like a local.

The infographic above, Aspects of Principal Exports of Chinese Goods to Foreign Countries , is the first in a series that we’re calling Vintage Viz , which presents a historical visualization along with the background and analytical tools to make sense of it.

Today, the People’s Republic of China is the second largest economy in the world, a permanent member of the UN Security Council, and a growing military power . But at the dawn of the 20th century, things were much, much different.

Opium and the Opening of China to the West

Early Sino-Western trade was restricted by the Qing emperors to three ports, and after 1757, just one, in what became known as the Canton System. This name came from the one remaining port city of the same name, present-day Guangzhou.

Foreign trade was tightly monitored and subject to stiff tariffs, and Western traders chafed under these restrictions. So when in 1839, Chinese authorities moved to shut down opium smuggling—an important source of profit for foreign merchants—Western powers saw their chance and used the pretext to revise the terms of trade by force.

In what became known as the Opium Wars, 1839-1842 and 1856-1860, first Great Britain and then an Anglo-French alliance defeated imperial China and imposed punitive treaties that included indemnities and lowered tariffs, but also expanded the number of ports open to foreign traders, first to five and by 1911, to more than 50.

Map of China in 1904

Westerners were exempted from local laws, Christian missionaries were allowed to proselytize freely, and the opium trade was legalized. Hong Kong was also ceded to Great Britain at this time.

The Treaty Port Era, also known as the Century of Humiliation , was perhaps too much for the country to bear. The weakened central government was beset by popular unrest, including the Taiping Rebellion (1850–64), which killed 20 million people, and the Boxer Rebellion (1899-1901), so-named for the secret society that led the movement, the Righteous and Harmonious Fists.

Eventually, the last Chinese emperor was deposed and a republic declared in 1911. Nevertheless, the government was too weak to impose its will, and was repeatedly challenged by warlords.

So as we approach the outbreak of the First World War in 1914, and the period covered by our visualization, we find China weakened internally by civil strife, and externally by Western powers.

The History of this Century-Old Pie Chart

Aspects of Principal Exports of Chinese Goods to Foreign Countries captures Chinese exports for 1914, and comes from The New Atlas and Commercial Gazetteer of China: A Work Devoted to Its Geography & Resources and Economic & Commercial Development .

Originally published in 1917 and edited by Edwin J. Dingle for the Far Eastern Geographical Establishment, the volume contains a wealth of data for the period. According to the book’s Preface, it “seeks to give all the information that is essential to the business-man in regard to a country… about which less is known than in regard to any similar area in the world.”

The visualization breaks down total Chinese exports for 1914 in haikwan taels (hk. tls.), a unit of silver currency used to collect tariffs. In 1907, one haikwan tael was worth $0.79 U.S. dollars.

Official figures come from the Chinese Maritime Customs Service . This was set up by foreign consuls after the First Opium War to collect tariffs to guarantee the payment of treaty indemnities.

Exports in 1914 represented 345 million hk. tls., a 14.4% decrease from 1913, likely owing to the outbreak of the First World War that same year.

Apart from “Other Metals and Minerals, Sundries, etc,” which served as a catch-all category, the largest categories were silks and teas of various types, representing 22.6% and 10.4% of total exports respectively.

Export Item Value (hk. tls.)
Animals, Living 5,270,910
Beancake 21,734,135
Bristles 4,347,582
Coal 8,624,805
Cotton Goods 2,012,128
Cotton, Raw 12,339,549
Eggs, Fresh, Preserved and Frozen 4,192,535
Fire crackers and fire works 2,435,841
Grasscloth 1,422,727
Mats and Matting 3,326,819
Medicines 2,672,341
Oil, Bean and Nutgalls 6,027,967
Oil, Groundnuts 2,414,900
Oil, Wood 3,736,275
Opium, Chinese 250,255
Other Metals and Minerals, Sundries, etc 74,449,181
Paper 2,864,983
Ramie 1,664,463
Seed, Rape 2,662,349
Seed, Sesamum 6,355,317
Sheep’s Wool 6,658,962
Silk Cocoons 2,078,721
Silk Piece Goods 10,841,472
Silk Pongees 4,720,914
Silk Waste 5,025,679
Silk, Raw, not Steam Filature 2,811,367
Silk, Raw, White, Steam Filature 37,384,485
Silk, Raw, Wild not Filatures 4,072,777
Silk, Raw, Yellow Steam Filatures 1,267,413
Silk, Raw, Yellow, (not Steam Filature) 4,439,073
Silk, Re-Reeled 5,552,127
Skins and Hides Undressed (Cow and Buffalo) 13,499,340
Skins, Goat Untanned 3,207,974
Straw Braid 1,104,310
Tallow, Animals and Vegetables 3,175,270
Tea Brick, Black 6,711,019
Tea Brick, Green 2,323,259
Tea, Black 16,203,547
Tea, Green 10,785,584
Timber 1,820,273
Tin, in Slabs 7,978,558
Vermicelli Macaroni 1,957,827
Wheat 3,850,179
Yellow Beans 19,005,709
Total 345,280,901

Below are some more details that emerge from this visualization.

All the Tea in China

The Chinese tea trade was the subject of another visualization in the Atlas. It shows that China had been steadily losing ground to British India. Between 1888-1892 Chinese exports to Great Britain were 242 million pounds against India’s 105 million pounds. By 1912-1913, India had surpassed China to export 279 million pounds against 198 million pounds.

In 1914, the majority of Chinese exports went to Russia, 902,716 piculs in all. A picul is equal to “as much as a man can carry on a shoulder-pole” or about 133 pounds.

The Silk Road to Profits

Silk has long been in demand in the West as a luxury good, giving its name to the overland trade route that connected East and West for centuries: the Silk Road.

In 1914, China was the largest producer and exporter of silks in the world. On an annual basis, China averaged 14 million pounds, compared to the number two spot, Japan, at 11 million pounds, and number three, Italy, at 9 million pounds. Together, these three controlled 81.7% of the global silk trade.

Chart showing China's silk supply in 1914

The Opium of the Masses?

The opium trade, the pretext that opened China to foreign trade, was still big money in 1914.

A total of 37 million hk. tls. were imported in 1914 from India, up 11.9% from 1908. This is actually down from a peak of 41 million hk. tls. in 1913.

Chart showing China's opium trade in the early 20th century

In 1907, China signed the Ten Year Agreement with India, which ultimately phased out the opium trade. By 1917 the trade was all but extinguished.

Back to the Future

The Aspects of Principal Exports of Chinese Goods to Foreign Countries is a far cry from the contemporary trade picture. China’s top export in 2021 was in the category “telephones for cellular networks or other wireless networks,” and was worth $147.1 billion .

But it’s worth noting that China today is a direct result of this period. The resentment created during the Century of Humiliation would eventually help lead to Mao Zedong, the Long March, and the establishment of the People’s Republic of China.

And in 1979, the Chinese central government would set up the first of their own “treaty ports,” in the form of special economic zones, places where foreign companies could set up shop. But this time, it wasn’t foreign powers who were making the rules.

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