To further clarify: Here are the exact definitions used by the NOAA U.S Tsunami Warning System. An *Advisory* means that "strong currents or waves dangerous to those in or very near the water is imminent...*but significant inundation is not expected*." "

This is in contrast to a Tsunami *Warning*, which *is indeed in effect* in some parts of the U.S. (including Alaska and Hawaii, but *not* West Coast), which means that "a tsunami with the potential to generate widespread inundation is imminent."