tsunami
What makes a tsunami — and what to do if one comes
Several factors help determine whether a given earthquake will generate a dangerous tsunami, but the process is not yet fully understood.
A tsunami makes its way across the Pacific, with waves hitting the U.S. West Coast
A powerful 8.8-magnitude earthquake in Russia's Far East is sending tsunami waves to Hawaii, Alaska, California and Oregon. More countries, like Peru and Chile, are bracing for impact.
