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Understanding Earthquakes | The Role of Earth's Crustal Plates - Encyclopedia BritannicaEncyclopedia Britannica · Wed, 05 Aug 2026 05:00:00 GMTExplore planet Earth's interior structure; the crust, the mantle, and the core - Encyclopedia BritannicaEncyclopedia Britannica · Wed, 05 Aug 2026 05:00:00 GMTHow the Richter Scale Measures Earthquakes - Encyclopedia BritannicaEncyclopedia Britannica · Mon, 03 Aug 2026 05:00:00 GMTLearn how the Richter scale measures magnitude and the Mercalli scale measures intensity of an earthquake - Encyclopedia BritannicaEncyclopedia Britannica · Mon, 03 Aug 2026 05:00:00 GMT