It appears the large boom was caused by an alder tree that fell in our back yard. All the rain lately has probably turned the hillside soil into so much mush.
About 11:05 we heard a large boom here in Shoreline that rattled the windows and shook the floor but couldn’t find anything out of place in the immediate neighborhood. The police say they haven’t received any other calls. I’m at 7th and 198th NE, curious if anyone else near here heard anything similar or knows what it was?