A notable ongoing event was the race for the South Pole. Events January January 1 – A decade after federation, the Northern Territory and the Australian Capital Territory are added to the Commonwealth of Australia. January 3 1911 Kebin earthquake: An earthquake of 7.7 moment magnitude strikes near Almaty in Russian Turkestan, killing 450 or more people. Siege of Sidney Street in London: Two Latvian anarchists die, after a seven-hour siege against a combined police and military force. Home Secretary Winston Churchill arrives to oversee events. January 5 – Egypt's Zamalek SC is founded as a general sports and Association football club by Belgian lawyer George Merzbach as Qasr El Nile Club. January 14 – Roald Amundsen's South Pole expedition makes landfall, on the eastern edge of the Ross Ice Shelf. January 18 – Eugene B. Ely lands on the deck of the USS Pennsylvania stationed in San Francisco harbor, the first time an aircraft has landed on a ship. January 26 – The United States and Canada announce the successful negotiation of their first reciprocal trade agreement. February February 5 The Missouri State Capitol building in Jefferson City, Missouri is destroyed by fire after a bolt of lightning strikes the dome. The revolution in Haiti is suppressed after the leader, General Montreuil Guillaume, is captured by government troops and shot. General Millionard is executed two days later. February 17 – The first "quasi-official" airmail flight occurs, when Fred Wiseman carries three letters between Petaluma and Santa Rosa, California. February 18 The first official air mail flight, second overall, takes place in British India from Allahabad to Naini when Henri Pequet carries 6,500 letters a distance of 13 km. A serious earthquake causes a landslide that creates Lake Sarez in modern-day Tajikistan. March March 19 – International Women's Day is celebrated for the first time across Europe. March 25 – The Triangle Shirtwaist Factory fire in New York City kills 146 people. March 29 – The United States Army adopts a new service pistol, the M1911, designed by John Browning (it remains the U.S. service pistol for 74 years). April April 3 – Jean Sibelius conducts the première of his Symphony No. 4, in Helsinki. April 8 – Heike Kamerlingh Onnes discovers superconductivity; he presents his findings on April 28. April 13 – Mexican Revolution: Rebels take Agua Prieta on the Sonora–Arizona border; government troops take the town back April