Tree-ring evidence for an A.D. 1700 Cascadia earthquake in Washington and northern Oregon

Research Article| November 01, 1997 Tree-ring evidence for an A.D. 1700 Cascadia earthquake in Washington and northern Oregon Gordon C. Jacoby; Gordon C. Jacoby 1Lamont-Doherty Earth Observatory, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar Daniel E. Bunker; Daniel E. Bunker 1Lamont-Doherty Earth Observatory, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar Boyd E. Benson Boyd E. Benson 2GeoEngineers Inc., 8410 154th Avenue N.E., Redmond, Washington 98052 Search for other works by this author on: GSW Google Scholar Author and Article Information Gordon C. Jacoby 1Lamont-Doherty Earth Observatory, Palisades, New York 10964 Daniel E. Bunker 1Lamont-Doherty Earth Observatory, Palisades, New York 10964 Boyd E. Benson 2GeoEngineers Inc., 8410 154th Avenue N.E., Redmond, Washington 98052 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1997) 25 (11): 999–1002. https://doi.org/10.1130/0091-7613(1997)0252.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Gordon C. Jacoby, Daniel E. Bunker, Boyd E. Benson; Tree-ring evidence for an A.D. 1700 Cascadia earthquake in Washington and northern Oregon. Geology 1997;; 25 (11): 999–1002. doi: https://doi.org/10.1130/0091-7613(1997)0252.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Geologic evidence and radiocarbon dating indicate that a subduction earthquake, or series of earthquakes, occurred about 300 yr ago along the Pacific Northwest coast of the United States. Some radiocarbon dates come from remnants of the myriad trees drowned by coincident subsidence. At several coastal lowland locations in Washington and northern Oregon, we located two or more trees that survived partial submergence and lived to the 1990s. Many of them were damaged by shaking and/or inundation. Some survivors recorded the event(s) by anomalous changes in ring width or anatomy of their annual rings. The disturbance initiating the changes can be dated to between the growing seasons of A.D. 1699 and 1700. One killed tree has a last ring of A.D. 1699. Tree-ring dated evidence of disturbance extends along about 100 km of coastal Washington and northern Oregon. These results support the inference that a great (Mw ∼ 8) earthquake or larger at the Cascadia subduction zone generated the historical tsunami that struck Japan in January 1700. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.