A view from Fourth Avenue in Anchorage, Alaska, looking east from near Barrow Street, after the 1964 Alaska Earthquake (also called the Great Alaskan Earthquake). The collapse of Fourth Avenue near C Street in Anchorage was due to a landslide caused by the earthquake. Before the shock, the sidewalk on the left was at street level on the right. This landslide was just one of several covered an area of over a dozen blocks, including 5 blocks along the north side of Fourth Avenue. Most of the area was razed and made an urban renewal district.
The Great Alaskan Earthquake happened a little after 5:30pm on March 27, 1964 (Good Friday). It lasted for four minutes and thirty-eight seconds but reached a magnitude of 9.2 – making it the most powerful recorded earthquakes in North American history and the second most powerful recorded in world history. The earthquake swept across south-central Alaska, causing about 139 deaths.