[simonh]

> gravity waves won't just spring into existence. You need that initial push.

The gravity wave that causes tides on Earth requires no such push, it's just straight up deformation of the oceans by Lunar and Solar gravity.

> In this case, the initial push seems to be wind hitting a mountain and being forced up.

Where did you get that from, the body of the article? It's not in the abstract, which only talks about gravitational effects.