Puget Sound faults about 1100 years ago (AD 900—930) an earthquake of magnitude 7+ uplifted Restoration Point and Alki Point, dropped West Point (the three white triangles in the Seattle Basin on the map), caused rockslides in the Olympics, landslides into Lake Washington, and a tsunami on Puget Sound. It extends as far east as (and probably terminates at) the Rattlesnake Mountain Fault Zone (RMFZ; the southern extension of the SWIF) near Fall City. This seems geologically reasonable, as both the SWIF and RMFZ appear to be the contact between Tertiary Crescent Formation basement of Puget Sound on the west and the older
Puget Sound mosquito fleet Puget Sound mosquito fleet The Puget Sound mosquito fleet was a large number of private transportation companies running smaller passenger and freight boats on Puget Sound and nearby waterways and rivers. This large group of steamers and sternwheelers plied the waters of Puget Sound, stopping at every waterfront dock. The historical period defining the beginning and end of the mosquito fleet is ambiguous, but the peak of activity occurred between the First and Second World Wars. Puget Sound and the many adjacent waterways, inlets, and bays form a natural transportation route for much of the western part of Washington. For