Tsunami warning!

A major magnitude 8.8 earthquake struck early Wednesday in far eastern Russia. Tsunami alerts have been issued in parts of Alaska, Hawaii, Japan and throughout the Pacific. A tsunami has been measured in the northern Pacific and the United States Geological Survey is warning that tsunami waves are possible as far away as Antarctica.😧
Let’s hope Roy Tatsuky wasn’t right about the Future she saw🤞

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ArishMell · 70-79, M

Waves normally decrease in amplitude with respect to distance, by an inverse-sqare law, if allowed to pass unimpeded.

Being detectable among normal wind-powered waves as far away as Antarctic is one thing but I wonder how high it would be?

If the wave is 1m high at only 10km from source, what would it be 1000km away across open, deep sea?

I think only 10mm but I am not sure if I have calculated it correctly, nor if that rule applies to a tsunami wave.