1923 Great Kantō earthquake collapsed due to urbanization. The 1923 earthquake led to record-high morbidity due to unsanitary conditions following the earthquake, and it prompted the establishment of antityphoid measures and the building of urban infrastructure. The Honda Point Disaster on the United States west coast, in which seven US Navy destroyers ran aground and 23 lives were lost, has been attributed to navigational errors caused by unusual currents set up by the earthquake in Japan. Beginning in 1960, every September 1 is designated as Disaster Prevention Day to commemorate the earthquake and remind people of the importance of preparedness, as August and September
2011 Christchurch earthquake in May 2012. The 21-storey PricewaterhouseCoopers building, the city's tallest office tower, is among the office buildings to be demolished. The Carlton Hotel, a listed heritage building, was undergoing repairs after the September 2010 earthquake damage when the February 2011 earthquake damaged the building further. It was deemed unstable and demolished in April 2011. St Elmo Courts has been damaged in the September 2010 earthquake and the owner intended to repair the building, but further damage caused by the February 2011 event resulted in a decision to demolish, which was done the following month. The historic Canterbury Provincial Council Buildings