This animation was developed by the US Geological Survey after the devastating 2005 earthquake in Pakistan. It shows how earthquake ground shaking of a building without adequate shear strength can result in collapse. An accompanying animation “Retrofit Building Withstanding Earthquake Ground Shaking” shows how addition of shear strength can mitigate earthquake damage.
QuickTime animation of 2004 Indian Ocean tsunami waves generated by the December 26, 2004 Sumatra – Andaman Islands great earthquake. The magnitude 9.2 great earthquake in the Sunda Trench occurred along the subduction zone between the India – Australia Plate and the southeastern corner of the Eurasian Plate. During the earthquake, the ocean floor in the Sunda Trench was offset and uplifted a column of ocean water producing an elongated mound of ocean water at the surface of the Indian Ocean. That mound of water then propagated to eastward toward northern Sumatra and Thailand and also westward toward Sri Lanka and India.
This animation was developed by scientists at NOAA’s Pacific Marine Environmental Laboratory in Seattle.
This video shows how structural engineers in the San Francisco Bay Area have retrofitted existing structures and designed new structures to withstand ground shaking during earthquakes. Examples of new buildings designed with modern materials are presented. Several examples of building and highway retrofitting are also presented. The example of base isolation of San Francisco City Hall is a major feature of this video segment. This video was developed by the the US Geological Survey to commemorate the 100th anniversary of the 1906 San Francisco earthquake.