Then you can just build a conventional 300kph high speed train and track. They are 'off the shelf' commodities these days.
It will still be competitive with flying.
Flight time is 1 hr 20 mins.
At 300kph it's going to take a high-speed train almost 3 hours.
And frankly not being subjected to the TSA is generally worth at least a few hours of my time. I'll sooner drive six hours than fly one because of those worthless assholes.
The damage from earthquakes tends to be a ripple of the ground in the first few meters and that’s it.
This isn't to say that engineering around these sorts of events is impossible. The Transalaksa oil pipeline crosses the Denali fault, and during the M7.9 Denali earthquake in 2002, the pipeline survived because it was built on sliders near the fault so it would bend when the earth shifted instead of breaking [3]. However, this is a big bend in the pipe; the lateral displacements are on the order of 5-10 m in an earthquake of this size, over a similar across-fault distance. Do you want to go at Hyperloop velocities through a tube with a bend this sharp?
[1]: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.833...
[2]: https://www.usgs.gov/media/images/modified-mercalli-intensit...
Melbourne to Sydney always seemed like a good choice to me. It's one of the busiest air routes in the world[1], there is obviously tons of solar, lots of open land beside the existing road, no seismic activity to speak of and it's a good long distance to get up to speed (~1000km).
[1] (actually #3 in the world by number of passengers) https://en.wikipedia.org/wiki/List_of_busiest_passenger_air_...