"aftershocks"

A magnitude 7.9 earthquake early Tuesday is what is known as a strike-slip, or when two large blocks move side-to-side instead of up-and-down. That, and it’s distance from shore may explain why tsunami waves were so small.

Aftershocks are rattling survivors’ nerves and making the recovery even more challenging. In one district, 400,000 people were affected by the quake and more than 4,000 homes are now unsafe.

The death toll is climbing after two earthquakes that struck western China early Monday.