Emperor Haile Selassie at a luncheon in Rockville, Maryland. October 2 Nigeria becomes a republic; The 1st Republican Constitution is established. The Presidential Commission on the Status of Women in the United States issues its final reports to President Kennedy. October 3 – 1963 Honduran coup d'état: A violent coup in Honduras pre-empts the October 13 election, ends a period of reform under President Ramón Villeda Morales and begins two decades of military rule under General Oswaldo López Arellano. October 4 – Hurricane Flora, one of the worst Atlantic storms in history, hits Hispaniola and Cuba, killing nearly 7,000 people. October 7 – Buddhist crisis: Amid worsening relations, outspoken South Vietnamese First Lady Madame Ngo Dinh Nhu arrives in the US for a speaking tour, continuing a flurry of attacks on the Kennedy administration. October 9 – In northeast Italy, over 2,000 people are killed when a large landslide behind the Vajont Dam causes a giant wave of water to overtop it. October 10 – Partial Nuclear Test Ban Treaty, signed on August 5, takes effect. October 14 – A revolution starts in Radfan, South Yemen, against British colonial rule. October 16 – Ludwig Erhard replaces Konrad Adenauer as Chancellor of West Germany. October 19 – Alec Douglas-Home succeeds Harold Macmillan as Prime Minister of the United Kingdom. October 24 – Fire at the Soviet Union's Baikonur Cosmodrome in an R-9 Desna underground missile silo; seven people are killed. October 30 – The car manufacturing firm Lamborghini is founded in Italy. October 31 – 1963 Indiana State Fairgrounds Coliseum gas explosion: 81 die in a gas explosion during a Holiday on Ice show at the Indiana State Fairgrounds Coliseum in Indianapolis, United States. November November 1 – Arecibo Observatory, a radio telescope, officially begins operation in Puerto Rico. November 2 – 1963 South Vietnamese coup: Arrest and assassination of Ngo Dinh Diem, the South Vietnamese President. November 6 – 1963 South Vietnamese coup: Coup leader General Dương Văn Minh takes over as leader of South Vietnam. November 7 – 11 German miners are rescued from a collapsed mine after 14 days in what becomes known as the "Wunder von Lengede" ("miracle of Lengede"). November 8 – Finnair aircraft OH-LCA crashes before landing at Mariehamn Airport on Åland. November 9 – Two disasters in Japan: Miike coal mine explosion: A coal mine explosion kills 458 and sends 839 carbon monoxide poisoning