marks needed to purchase a single American dollar reach 353,000 – more than 200 times the amount needed at the start of the year. August 3 – Vice President Calvin Coolidge is sworn in as the 30th President of the United States as a result of the sudden death of President Warren G. Harding in San Francisco a day earlier. August 13 The first major seagoing ship arrives at Gdynia, the newly constructed Polish seaport. Gustav Stresemann is named Chancellor of Germany, and founds a coalition government for the Weimar Republic, where hyperinflation means that more than 4,600,000 marks are now needed to buy a single American dollar. August 18 – The first British Track & Field championships for women are held in London. August 30 – Hurricane season begins, with a tropical storm northeast of the Turks and Caicos Islands. August 31 – The Italian navy occupies Corfu, in retaliation for the murder of an Italian officer. The League of Nations protests, and the occupation ends on September 30. September–October September 1 – The Great Kantō earthquake devastates Tokyo and Yokohama, killing more than 100,000 people. September 4 – The United States Navy's first home-built rigid airship makes her first flight at Naval Air Station Lakehurst (New Jersey); she contains most of the world's extracted reserves of helium at this time. September 7 – At the International Police Conference in Vienna, the International Criminal Police Commission (ICPC), better known as Interpol, is set up. September 8 – Honda Point disaster: Nine United States Navy destroyers run aground off the California coast. September 9 – Turkish head of state Mustafa Kemal Atatürk founds the Republican People's Party (CHP). September 10 – The Irish Free State joins the League of Nations. September 11 – Struggling for a foothold in southern China, Sun Yat-sen decides to ally his Nationalist Kuomintang party with the Comintern, and the Chinese Communist Party. September 13 – Military coup in Spain: Miguel Primo de Rivera takes over, setting up a dictatorship. Trade unions are prohibited for 10 years. September 17 – 1923 Berkeley Fire: A major fire in Berkeley, California, erupts, consuming some 640 structures, including 584 homes in the densely built neighborhoods north of the campus of the University of California. September 18–26 – Newspaper printers strike in New York City. September 24 – Atlantic hurricane season: The second major hurricane strikes north of Hispaniola. September