Hawaii tsunami: Initial tsunami waves are small. But Hawaii residents got a good test of tsunami preparedness in the wake of Saturday's magnitude 7.7 earthquake off Canada.
Canada earthquake: The earthquake stuck just after 8 p.m. local time Saturday, creating a small tsunami. No major damage or injuries have been reported in Canada. Hawaii still on tsunami watch.
The tsunami that struck Japan today generated a huge whirlpool. How do tsunamis generate whirlpools?
A study found that up to 30 percent of the geese now forgo migrating to warmer regions of the Pacific coast.