Studies around Humboldt Bay indicate tectonic activity along the Cascadia subduction zone has caused local sea level changes at intervals of several centuries.
U.S. state | Georgia (U.S. state) | São Paulo (state) | Secretary of State | Washington (U.S. state) | state | United States Department of State | Moscow State University | United States Secretary of State | National Park Service | Ohio State University | Michigan State University | New York State Assembly | State Senator | Hyde Park | Central Park | South Park | New York State Senate | Rio de Janeiro (state) | Louisiana State Legislature | Iowa State University | Pennsylvania State University | Louisiana State University | Santa Catarina (state) | Florida State University | Paraná (state) | Yellowstone National Park | Vienna State Opera | Oregon State University | Humboldt University of Berlin |