A strong earthquake struck the New Zealand city of Christchurch Sunday, rattling the country's South Island and causing cliffs to collapse. As yet, no deaths or major injuries have been reported from the quake, which was rated Magnitude 5.8 by the United States Geological Survey (M5.7 by New Zealand's Geonet agency), striking at a relatively shallow depth of 8 km (Geonet reports 15 km). Social media was flooded with video of clouds of dust in the air as the strong shaking caused some cliffs to collapse, triggering evacuations. Some liquefaction was reported in some areas, and the shaking was felt throughout the region.
