It's 旧金山 (jiu jin shan), but otherwise you're right.
[0] https://www.google.com/search?q=%E6%96%B0%E9%87%91%E5%B1%B1
See also: "New Forest", England, 1079.
It also happened just a few years (very much less than a decade) after the California Gold Rush, and there were other gold rushes after that, so I'm not sure why it's "new" either.