this is really a California issue but may be applicable to some midwesterners that are experiencing fracking-induced earthquakes or other countries prone to earthquakes.
I started thinking about this because we are trying to improve out earthquake preparedness. MC and scooters are relatively top heavy and pretty easy to topple over. When (not, If) a strong earthquake hits, I suspect one or more of my bikes may go over. The epicenter of the devastating 1989 San Francisco earthquake was about 2-3 miles from my house and toppled bridges and buildings in San Francisco and Oakland 75 miles North to give you a sense of the energy released in strong quake.
I've thought about running a 4x4 across several ceiling joists and just hanging straps from hooks and then over the handlebars. sort like strapping a bike to a pallet or trailer except you are strapping up, not down. I think it'd be pretty quick to park and strap it. My heaviest bike is about 600 lbs without the rider.
For those that don't live in earthquake country, strapping things in place is a common strategy. It's code to strap water heaters and perhaps furnace. We strapped our washer and dryers in place too. Where I work, all bookshelves and equipment racks are strapped to the building walls.
Best
Miguel