Tsunamis (pronounced soo-ná-mees), also known as seismic sea waves (mistakenly called ... That is why a small tsunami at one beach can be a giant wave a few miles away. All tsunamis are ...

"And that force creates seismic waves ... also "happening a lot more often, occurring at least twice as often from 1996 to 2016 than from 1949 to 1969," The Associated Press reported. "As sea ...

Two huge masses deep within ... measurements of such seismic waves identified two strange continent-sized structures, one beneath the Pacific Ocean and one beneath Africa. They extend nearly ...