Complex sentence: The 1929 Grand Banks earthquake, also called the Laurentian Slope earthquake and the South Shore Disaster, was a magnitude 7.2 earthquake that occurred on November 18,1929 in the Atlantic Ocean off the south coast of Newfoundland in the Laurentian Slope Seismic Zone.
Split into simpler sentences: The 1929 Grand Banks earthquake (also called the Laurentian Slope earthquake and the South Shore Disaster) occurred with a moment magnitude of 7.2 on November 18. The shock was centered in the Atlantic Ocean off the south coast of Newfoundland in the Laurentian Slope Seismic Zone.