4.3 magnitude earthquake felt across western Washington

 https://www.king5.com/article/news/local/43-magnitude-earthquake-poulsbo/281-f0afda04-87de-42f1-b32b-2605eb2e7de4

https://komonews.com/news/local/earthquake-washington-sunday-evening-magnitude-tremors-pacific-northwest-seismic-network-pugert-sound-seattle-region-intensity-damage

https://pnsn.org/earthquakes/recent

https://earthquaketrack.com/p/united-states/washington/recent

By the time electric power was established in Seattle, the city was well on its way to becoming the largest in the Pacific_Northwest. 

https://en.wikipedia.org/wiki/Seattle_City_Light#History

https://thedigitallabyrinth.blogspot.com/search?q=earthquakes