The U.S. Geological Survey simulated a 7.0 magnitude earthquake on the Hayward Fault near Oakland, Calif., and found that such a quake could kill hundreds and cause more than $100 billion in damage.
A 7.5 magnitude earthquake struck in the country's isolated interior on Monday, triggering landslides. Days later, rescuers are still working to reach some remote communities.
The 7.5 magnitude temblor rocked the central highlands in the half-island Pacific nation early Monday. Phone lines are down and roads are blocked, making a full assessment of the remote area hard.
One day after a major earthquake hit the island, killing at least seven people and leaving dozens missing, another sizable temblor rattled rescue workers who were seeking survivors in amid the rubble.
The earthquake struck the island late Tuesday night and aftershocks continue to shake up the city of Hualien. Meanwhile, rescue workers strive to save people from collapsed buildings.