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
Port Ludlow, Washington west side of Puget Sound. Based on per capita income, Port Ludlow ranks 16th of 522 ranked areas in the state of Washington, and the highest rank achieved in Jefferson County. Port Ludlow's location and marina facilities make it a convenient and popular port for leisure craft sailing between Puget Sound and the San Juan Islands. The United States Exploring Expedition, under Charles Wilkes, entered Puget Sound in 1841. Wilkes bestowed many patriotically American place names; at the time the sovereignty of the Oregon Country was yet to be resolved between Britain and the United States. Many of Wilkes's names