After the Good Friday earthquake on March 27 , 1964 , which registered 9.2 on the moment magnitude scale , the surrounding land mass dropped six feet . Seldovia 's " boardwalk " before the earthquake was thick wooden plank and piling , and the town 's main street was built almost entirely along the waterfront . Most of the community 's businesses , and many homes were similarly constructed upon pilings on either side of this " street " . The sudden sinking of the land caused higher tides , peaking at 32 feet , to completely submerge the boardwalk and flood the homes and businesses along the waterfront
Good Friday earthquake
1964 Alaska earthquake
Seldovia, Alaska