If you would like to receive free real time update on tsunami and earthquakes, there is a way to receive text messages. It will 1st tell you where and the magnitude of an earthquake. Then another text message to tell you if there will be a tsunami.
Warning: It's great information but just
know that they will text you even in odd hours like 3 am.
To receive tsunami alerts on phone send a text to 40404 and type follow nws_ntwc
A Huge Thank You to the National Weather Service, National Tsunami Warning Center.