Well, I've always wondered how long the sirens went off in case of an actual tsunami threat. 5-6 minutes worth. They test the siren system at 11:45am the first weekday of each month for about a minute or so... I've heard them once or twice when they've gone off accidentally at oddball hours, that usually causes a stir.
Latest news is they're expecting some wrap around on this side of the island, sounds like a cancel for our charter. It's not worth taking a chance of something unexpected occurring.