My guess is on earth probably in the ocean or on pangea or something. There also was a large earthquake everyday when meteors hit the earth and added to the earths mass to create the planet.
Easily the world's worst Earthquake.
Santiago Janipsi.
Chile - May 22nd 1960 - 9.5
90
The largest modern earthquake happened on May 22, 1960 in Valdivia, Chile. it registered a 9.5.
the ring of fire
In Chile in 1960, a 9.5 on the Richter scale
the first earthquake in oklahoma was in 1905, in oklahomacity. people don't know this, but that was the first earthquake in the United States.
Chile in 1960 registered at 9.5. Japanese earthquake of 2011 registered at 9.0. pretty sure there was worse before 1900 though.
Cromford mill was the worlds first factory
sri lanka (hello. I did not write this Bullcrap above. The question was "when" not "where" and the answer still isn't correct! Oh and I don't know the answer either, but it isn't Sri Lanka)
the worlds most dangorus earthquake was in south America it hit a 9.2 on the rickter scale