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Note how intensity is highest right around the most densely developed areas of Christchurch.

The deeper the red color of the circle, the more intense the “peak ground acceleration,” or shaking of the earth. Geological Survey's Earthquake Hazard Program. Overlain on the map are seismological measurements of the ground shaking in the Christchurch area on February 22, as noted by the U.S.

The natural-color image above was captured on March 4, 2011, by the Advanced Land Imager (ALI) on NASA’s Earth Observing-1 (EO-1) satellite. At least 166 people died, and the city of Christchurch was devastated structurally and emotionally. It had a magnitude of 6.3, though was officially classified-scientifically speaking-as an aftershock of the 2010 quake. and just 10 kilometers (6 miles) from the center of Christchurch. The earthquake in February 2011 occurred at 12:51 p.m.

Such was the case with the earthquake in Christchurch, New Zealand, on February 22, 2011.Ī September 2010 earthquake centered 40 kilometers (25 miles) west of Christchurch, in the plains near Darfield, struck at 4:35 a.m., had a magnitude of 7.1, and caused some structural damage and one death (by heart attack). It is a modern human tendency to focus on the number of an earthquake-specifically, the magnitude, or what people used to call the “Richter scale.” But the destruction from a quake usually has more to do with location and timing.