Natural but not disasters.
I once had a set-to with an expert from NCAR over a broken window. I used it to forecast a large earthquake or a tropical storm - I forget which. He doesn't post on uk.sci.weather these days but recently, neither do I. Scientists can be natural disasters. I had no idea who he was and went for the throat in my usual impeccably impervious manner.
So no great loss there. I on the other hand get upset too easily so my going AWOL is best for everyone, me included. I wonder if he post anonymously. I won't.
Natural big weather depends for convergence on gravity wells called weather fronts, a form of Lagrangian Point. Neutral points tend to attract convergence. Wiggins, a Canadian, in the era of the cowboy was using them to forecast the Storm of the Millennium. He died thinking he was a failure but he forecast Krakatoa instead. You can get his manual on the Gutenberg Project.
Today the Canadian-EFS is perfect for forecasting US tornadoes or world-wide volcanic eruptions. IKYN, anyone can do it if they know the rules for noughts and crosses.
Another mystic (in Coimbatore) with a lousy IT facility, uses/used? (retired now?) a ladder fixed top and bottom to a concrete wall. You can quite easily imagine how that works, he has no idea. California a land of eccentrics that easily matches Britain's quotient has any number of adepts. It has something to do with purine nucleotides I think. I believe they become more soluble during volcanic unrest. the solute is liable to sedimentation on a tidal scale. Just guessing obviously.
But back to the subject, old kit is liable to disruption during earthquake activity but so is modern stuff. The problem is likely to be crystals in the electronics. For that reason old kit that has stood the test of time can still be working perfectly in the periods of high outages. (Look for Blocking Highs in the Atlantic Approaches.)
Keep a couple of spare old-faithfuls running as a back-up. If you don't switch them off too often, they may never be needed. Good luck.