- Depth: Up to 70 km (43 miles)

- Cause: Movement along faults in the Earth's crust

- Effects: Can cause significant damage to structures and infrastructure near the epicenter

- Examples: The 2010 Haiti earthquake, the 2008 Sichuan earthquake, and the 1994 Northridge earthquake

Deep

- Depth: More than 300 km (186 miles)

- Cause: Movement of tectonic plates at a depth where the rock is hotter and more pliable

- Effects: Less likely to cause significant damage to structures and infrastructure, but can generate large tsunamis

- Examples: The 2011 Tohoku earthquake and tsunami, the 2004 Indian Ocean earthquake and tsunami, and the 1960 Chile earthquake