Complex sentence: A powerful, magnitude-7.6 earthquake shook Costa Rica and a wide swath of Central America at 8:42 a.m. (10:42 a.m. EDT; 1442 GMT) 09/05/2012.
Split into simpler sentences: A powerful, magnitude-7.6 earthquake shook Costa Rica and a wide swath of Central America. The quake struck at 8:42 a.m. (10:42 a.m. EDT; 1442 GMT) 09/05/2012.