Tristan da Cunha:

The 1961 eruption of Queen Mary's Peak forced the evacuation of the entire population via Cape Town to England. The following year a Royal Society expedition went to the islands to assess the damage, and reported that the settlement of Edinburgh of the Seven Seas had been only marginally affected. Most families returned in 1963.

Please answer a question about this article. If the question is unanswerable, say "unanswerable". What year was the island evacuated due to an eruption?
1961