Complex sentence: On 28 December 1908, from about 05:20 to 05:21, an earthquake of 7.1 on the moment magnitude scale occurred, its epicentre was in the Strait of Messina which separates the busy port city of Messina in Sicily and Reggio on the Italian mainland.
Split into simpler sentences: On 28 December 1908, from about 05:20 to 05:21, an earthquake of 7.1 on the moment magnitude scale occurred. Its epicentre was in the Strait of Messina which separates the busy port city of Messina in Sicily and Reggio on the Italian mainland.