What was the largest explosion ever detonated by mankind?

The Tsar Bomba, detonated by the USSR in 1961.

Fat Boy Leader's latest tantrum (which I am nearly sure is going to be found to NOT, in fact, be a thermonuclear detonation -- they've already said that seismically, it nearly matches their past detonations) got me to thinking about thermonuclear bombs, and I came across this and found it interesting. The hovering fireball (it's own shockwave stopped it from hitting the ground) is pretty cool. I encourage you to look at the pics on the page. From the wiki page:


The original, November 1961 AEC estimate of the yield was 55–60 Mt, but since 1992 all Russian sources have stated its yield as 50 Mt. Khrushchev warned in a filmed speech to the Supreme Soviet of the existence of a 100 Mt bomb. (Technically the design was capable of this yield.) Although simplistic fireball calculations predicted the fireball would hit the ground, the bomb's own shock wave reflected back and prevented this.[12] The fireball reached nearly as high as the altitude of the release plane and was visible at almost 1,000 kilometres (620 mi) away from where it ascended. The mushroom cloud was about 64 kilometres (40 mi) high (over seven times the height of Mount Everest), which meant that the cloud was above the stratosphere and well inside the mesosphere when it peaked. The cap of the mushroom cloud had a peak width of 95 kilometres (59 mi) and its base was 40 kilometres (25 mi) wide.

All buildings in the village of Severny (both wooden and brick), located 55 kilometres (34 mi) from ground zero within the Sukhoy Nos test range, were destroyed. In districts hundreds of kilometers from ground zero wooden houses were destroyed, stone ones lost their roofs, windows and doors; and radio communications were interrupted for almost one hour. One participant in the test saw a bright flash through dark goggles and felt the effects of a thermal pulse even at a distance of 270 kilometres (170 mi). The heat from the explosion could have caused third-degree burns 100 km (62 mi) away from ground zero. A shock wave was observed in the air at Dikson settlement 700 kilometres (430 mi) away; windowpanes were partially broken to distances of 900 kilometres (560 mi).[13] Atmospheric focusing caused blast damage at even greater distances, breaking windows in Norway and Finland. The seismic shock[verification needed] created by the detonation was measurable even on its third passage around the Earth.[14] Its seismic body wave magnitude was about 5 to 5.25.[12]

https://en.wikipedia.org/wiki/Tsar_Bomba