system
Given the following post, respond as if you're commenting on Reddit:
human
When a huge piece of ice calves off a glacier/ice sheet into the sea, once the initial ‘wave’ settles is the sea level rise around the world instant or does it take a long period of time to take effect?

I hope this lengthy question makes sense. Essentially, I have always wondered whether sea levels around the world rise simultaneously when something large enters the ocean (e.g. an iceberg forms in Greenland and sea levels in the Pacific rise immediately once the initial wave caused by the falling ice settles), or whether it takes a period of days or even weeks for the effects of the sea level rise to be felt thousands of miles away.

I’m aware this may sound like a dumb question but I have been unable to find any clear answers to this and I am genuinely curious.

Edit: I should clarify, when I say instant, I don’t mean it literally. I’m more meaning it as being a very rapid sea level rise rather than gradual/slow.
gpt
The speed of propagation will be at most the speed of sound in water. That is sort of the speed limit for the propagation of bulk mechanical vibration through a medium. In theory this will take a day or two (at most) to go around the world. The only thing is that there is already so much bulk movement of water (tides etc) and even the biggest calving event is miniscule relative to the amount of water in all of the oceans that it is not likely to be measurable.