Largest Meteorites Ever Found on Earth

Data

💡 Note: What Makes a Meteorite Big, Heavy and Findable?

A meteorite is a piece of space rock that survived the trip through the atmosphere and reached the ground. Scientists use three words for what is really one object at different stages. A meteoroid is the rock while it drifts through space, a meteor is the streak of light it makes as it burns up (a shooting star), and a meteorite is whatever is left lying on the surface. Only the mass that has actually been recovered and weighed counts toward a ranking like the one above.

Two more terms matter. A meteorite fall is one that somebody watched come down and then recovered. A meteorite find was stumbled upon later, with no eyewitness. Falls are scientifically precious because the moment of arrival is known, but they are rare: usually only five to ten a year are recovered and reported to scientists. None of the twenty giants on this chart was a witnessed fall. Every one was found, often by a farmer, a prospector or a railway worker who had no idea what they were looking at.

🧲 Why every name on this list is iron

Meteorites come in three broad families: stony meteorites (mostly silicate rock), iron meteorites (mostly iron and nickel), and stony-iron meteorites, which contain large amounts of both. Ordinary stony meteorites are the most common type recovered, yet not a single one appears on this chart, and the reason is mostly physics.

• Iron is dense and tough. Iron meteorites run roughly 7 to 8 grams per cubic centimetre, two to three times denser than stony ones, and a solid metal mass holds together far better while ramming through the air at kilometres per second.
• Stony bodies break apart. Large stony objects usually shatter in the atmosphere and arrive as a shower of small stones, so they can never be weighed as one 20-tonne piece.
• Iron is easy to notice. Iron meteorites are magnetic, unusually heavy for their size and they respond to a metal detector, which is why so many were turned up by ploughs and shovels.
• Most are octahedrites. Polished and etched with acid, these irons reveal the Widmanstatten pattern, a geometric cross-hatching that only forms during millions of years of extremely slow cooling inside an asteroid. It is a fingerprint of deep-space origin. Two entries here, Hoba and Santa Catharina, are ataxites: nickel-rich irons with no visible pattern at all.

🏔️ How a 60-tonne rock lands without leaving a crater

Meteoroids enter the atmosphere at more than 10 km per second, and the air does brutal work on them. The outer layer melts and is stripped away (ablation), which is why so many recovered specimens carry a dark fusion crust and shallow thumbprint-like dents called regmaglypts. Big irons can be slowed so completely that they simply stop falling and settle gently.

• Hoba is the extreme case. It is inferred to have hit the ground at terminal velocity, roughly 2.75 km per second, after entering at well over 10 km per second. It left no preserved crater, and the locals who found it had no impact feature to guide them.
• Most large objects never land whole. They explode in an air burst, spraying fragments across a strewn field rather than leaving one giant lump.
• Sikhote-Alin, 1947 is the largest iron fall ever witnessed: around 23 tonnes of fragments survived the entry, some burying themselves 6 metres deep, after the main mass broke up about 5.6 km above the Sikhote-Alin mountains in the Soviet Union.
• Chelyabinsk, 2013 showed the air-burst effect on a city. The object exploded about 30 km up and the shock wave broke windows, sending 1,491 people for medical treatment. It was the largest object to enter the atmosphere since the Tunguska event of 1908.
• The practical result: the heaviest meteorites tend to be iron, they sit on or just under the surface, and the biggest one of all is still sitting exactly where it landed.

🌍 Where the giants actually turn up

• Namibia: Hoba was found in 1920 when the landowner Jacobus Hermanus Brits heard his ox-drawn plough screech against metal. It is a flat slab about 2.7 by 2.7 by 0.9 metres, roughly 84% iron and 16% nickel with traces of cobalt, and it has never been moved. It was declared a national monument in 1955, with the protected area enlarged in 1979.
• Greenland: the Cape York strewn field produced two entries here, Ahnighito (30,880 kg) and Agpalilik (20,140 kg).
• Argentina: Campo del Cielo is a crater field 18.5 km by 3 km with at least 26 craters, the largest 115 by 91 metres, from an impact 4,000 to 5,000 years ago. Around 100 tonnes of fragments have been recovered there in total, more than at any other site.
• China: the Aletai field is at least 430 km long, believed to be the largest meteorite debris scattering field on the planet, created by a stone-skipping trajectory through the atmosphere. Its total known weight is about 74,500 kg, and the irons belong to the very rare IIIE-an chemical group, which contains only two known meteorites. The Armanty fragment was hauled to Urumqi in 1965 and now stands outside a local museum.
• Somalia: El Ali had been known to local pastoralists for five to seven generations and features in regional songs and folklore, but was recognised internationally as a meteorite only in 2020. In 2022 researchers identified two minerals new to science, elaliite and elkinstantonite, inside a 70 gram slice.
• United States: the Willamette meteorite, known to the Clackamas Chinook as Tomanowos, is the largest ever found in the country. It has no crater at its discovery site because it was carried there as a glacial erratic roughly 13,000 years ago, it is sacred to Willamette Valley tribes, and it has been displayed in New York since 1906.
• Brazil: Bendego was found in 1784 by a boy grazing cattle in Bahia. It has sat in Brazil's National Museum since 1888 and survived the 2018 fire that destroyed much of the building, escaping with no major damage.

⚖️ Reading this ranking carefully

• The number is the recovered piece, not the original object. What hit the ground was far larger in every case; the rest burned away or still lies buried.
• Several entries are siblings from a single fall. Aletai contributes three names, Campo del Cielo three, Cape York two, and Chupaderos and Mundrabilla two each. Count them as families and the list of distinct events gets noticeably shorter.
• Hoba is listed as more than 60 tonnes. Erosion, scientific sampling and outright vandalism have shaved mass off it over the decades.
• Small gaps are noise. Ahnighito at 30,880 kg and Gancedo at 30,800 kg differ by 80 kg, well inside the margin of how carefully an irregular metal block can be weighed.
• The ranking keeps moving. Gancedo, found in 2016, and El Ali, recognised in 2020, pushed the Willamette out of the top ten, a spot it had held for most of a century.
• Published figures vary. Different catalogues report slightly different weights for the same specimen, often because a slice was cut for research. Bendego is a good example, cited at 5,360 kg and 5,260 kg in different records.

🔍 If you think you found one

• Check the basics first. A meteorite is usually magnetic, noticeably heavy for its size, and may show a dark fusion crust or thumbprint dents.
• Do not clean, cut or polish it. That can strip the surface evidence scientists need and slash the scientific value.
• Record exactly where it was. GPS coordinates plus photos in place are worth far more than a tidy sample with no provenance.
• Know the law. Many countries treat meteorites as state property, and protected sites exist. Hoba, for example, is a national monument in Namibia.
• Ask an expert. A university geology department or a national meteorite group can confirm it, usually for free.
• Expect a meteorwrong. Most hopeful finds turn out to be industrial slag, hematite or magnetite, which is the affectionate term for a rock that merely looks the part.
• Best hunting grounds: Antarctica's blue-ice fields and dry deserts such as the Sahara and the Atacama, where a dark rock stands out against pale, dry ground that does not rust it away.

🤓 Fun facts

• Hoba is about twice as massive as the largest single fragment of the Cape York meteorite.
• Hoba has never been moved from the spot where it fell, which makes it the heaviest known meteorite and one of the few that is still exactly where the universe left it.
• The three Aletai irons together weigh about 69 tonnes and may all come from one object that skipped across the atmosphere for hundreds of kilometres.
• Bendego was, at the time of its discovery in 1784, the second largest meteorite known in the world.
• Two minerals found nowhere else on Earth, elaliite and elkinstantonite, were named after the El Ali meteorite in 2022.
• Only five to ten falls a year are recovered and reported, yet the twenty heaviest specimens on record were all chance discoveries rather than watched arrivals.

In short, this chart is a ranking of iron, patience and luck. Iron because only metal-rich bodies survive atmospheric entry in one enormous piece, patience because most of these giants sat in fields and valleys for decades or centuries before anyone realised what they were, and luck because not one of them was seen falling.