The Nisqually earthquake occurred on February 28, 2001, and was one of the largest recorded earthquakes in Washington state history. The quake measured 6.8 on the Richter Scale and was centered about 17 km northeast of Olympia at a depth of 52km. Most of the property damage occurred very near the epicenter or in unreinforced concrete or masonry buildings, such as those in the Pioneer Square and Sodo neighborhoods of Seattle. The quake cracked the dome atop the state Capitol in Olympia. There were no reports of deaths directly from the earthquake, but some sources say that there was one death from a stress-related heart condition at the time of the earthquake; the quake also caused approximately 250 injuries. February 28 is the 59th day of the year in the Gregorian calendar. ... 2001: A Space Odyssey. ... Global earthquake epicenters, 1963–1998 An earthquake is a trembling or a shaking movement of the Earths surface. ... State nickname: The Evergreen State Other U.S. States Capital Olympia Largest city Seattle Governor Christine Gregoire (D) Official languages None Area 184,824 km² (18th)  - Land 172,587 km²  - Water 12,237 km² (6. ... The Richter magnitude test scale (or more correctly local magnitude ML scale) assigns a single number to quantify the size of an earthquake. ... A kilometre (American spelling: kilometer) (symbol: km) is a unit of length equal to 1000 metres (from the Greek words khilia = thousand and metro = count/measure). ... State Capitol and waterfront, Olympia, Washington. ... The epicenter is directly above the earthquakes focus. ... This article is about the construction material. ... The term masonry can also refer to Freemasonry Masonry is the building of structures from individual units laid in and bound together by mortar. ... Building is either the act of creating an object assembled from more than one element, or the object itself; see also construction. ... Pioneer Square Pergola, 1914 Photograph courtesy Seattle Municipal Archives Pioneer Square is the neighborhood where Seattle, Washington was founded in 1853. ... SoDo SoDo is a neighborhood in Seattle, Washington, that makes up part of the citys Industrial District. ... Neighbourhood is also a term in topology. ... City nickname Emerald City City bird Great Blue Heron City flower Dahlia City mottos The City of Flowers The City of Goodwill City song Seattle, the Peerless City Mayor Greg Nickels County King County Area   - Total   - Land   - Water   - % water 369. ... In Western culture, skeletons are often the symbol of death. ... Stress has different meanings in different fields: Stress (physics); see also tensile stress, shear stress and pressure. ... The heart and lungs (from an older edition of Grays Anatomy) The heart (Latin cor) is a hollow, muscular organ that pumps blood through the blood vessels by repeated, rhythmic contractions. ...

The Puget Sound area where this earthquake occurred is prone to deep earthquakes due to the Juan de Fuca tectonic plate's subduction under the North American Plate, which causes stress in the former as it sinks into the mantle. Similar significant earthquakes occurred in the same general region on April 29, 1965 (magnitude 6.5, depth 63km), and April 13, 1949 (magnitude 7.1, depth 53km). Puget Sound Puget Sound is an arm of the Pacific Ocean in the Pacific Northwest of the United States. ... hi ... The tectonic plates of the world were mapped in the second half of the 20th century. ... Subduction zones mark sites of convective downwelling of the Earths lithosphere. ... The North American plate is shown in brown on this map The North American Plate is a continental tectonic plate covering the continent of North America, extending eastward to the Mid-Atlantic Ridge and westward to the Cherskiy Range in East Siberia. ... Earth cutaway from core to exosphere. ... April 29 is the 119th day of the year in the Gregorian calendar (120th in leap years). ... 1965 was a common year starting on Friday (link goes to calendar). ... April 13 is the 103rd day of the year in the Gregorian calendar (104th in leap years). ... 1949 is a common year starting on Saturday. ...

External links

• Nisqually Information from the University of Washington