WSB
Hi! Thanks for asking. Years ago, we covered a neighborhood group solving the mystery of what at least at the time was the source of a hum – you should be able to find many stories searching our archives (or search Google on the term “west seattle hum” and “westseattleblog.com”). At the time, it was traced to the vacuum systems used to unload dry-cargo ships on the Duwamish. In the years since, every time we got a note asking about a “hum,” I would check a ship tracker and sure enough, there’d be a dry-cargo ship in on the Duwamish. When I first read your note earlier today, I looked at vesselfinder.com and noted two dry-cargo ships on the river. Without further investigation, of course, we can’t say for sure that’s what you’re hearing, but it’s certainly been a past culprit. Hard to do with a baby, I’d imagine, but next time you feel it’s really loud, you might even consider driving down to West Marginal and seeing if you hear it from a particular plant – TR