Tinpis...
I wasn't there in 72 but I was manning the tower in 76 when a big guria (7.6 on the Richter if memory serves me correctly) hit, centred in Astrolabe Bay.
At first I thought a truck had hit the tower but once I realised what it was I headed down the stairs in a hurry only to have an AirYugimi F28 call at 30 miles inbound. Being young and foolish in those days I headed back up to tell him what was going on. Apart from a few minor wobbles it was all over by the time i got back up.