I had a troubling afternoon today. There was a very large earthquake off Samoa this morning and it generated a tsunami that swept parts of the islands and caused at least 14 deaths.
Tsunami warnings were raised throughout the south pacific. Tsunami watches were also issued. And in the afternoon a tsunami advisory was issued for most of the west coast of North America.
Now each of these alerts have different meanings. In scale a warning is worse than a watch which is worse than an advisory. If you are under a warning you move up immediately. Under a watch, you are ready to move up if necessary. An advisory suggests you that you not be in or near the water when the tsunami arrives.
So when the advisory was raised, I thought about posting it to Facebook. Some of my friends live on the coast and I thought they might like a heads up. On the other hand, I didn’t want to entice other folks to run to the beach to check it out.
I finally decided to post a link to the advisory and spell out that most likely nothing will happen. But you want to keep safe if you are around the coast this evening.
After posting the note, I got a comment that the warning had been canceled. And while that was true, the advisory was still in effect.
The problem was that the warning had been canceled, and watches had been downgraded to advisories for other parts of the Pacific. The advisory is still in effect on the west coast.
In this day of instant news, you need to be aware of both when and where reports are coming from. While a tsunami warning may be canceled in the South Pacific, that doesn’t mean you have the all clear on the west coast.
Anyway, I am glad that I decided to make the post, and I am also pleased that the comments pointed out flaws in the system.