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Via e-mail and text, we've received multiple reports of something loud that shook homes in northeast West Seattle just after 7:30 pm - North Delridge, Luna Park, east Admiral/south Harbor Ave. areas.

Reports were like this one from Steph:
Our house shook so hard things moved a little.
We've checked around and there were no SFD emergency responses for explosions, fires, crashes; also, no earthquake reports. So far, officially a mystery, but we're mentioning it in case you wondered too.