I'm not sure why I agree with the op, but I do. I think it has something to do with the fact that this convention of planet prefix, and geological activity suff

I'm not sure why I agree with the op, but I do. I think it has something to do with the fact that this convention of planet prefix, and geological activity suffix is not going to work well at astronomical scales. Epsilon-eridani-c-quake is kind of a mouthful, no? It could be argued that doesn't work very well on a human scale either. after all when there's an earthquake, barring a civilization-ending apocalyptic situation, it's not the whole Earth that's quaking (at a human scale perspective), but rather a localized crustal region of it. A patch of earth (lowercase).