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This is an archive of AGU's GeoSpace blog through 1 July 2020. New content about AGU research can be found on Eos and the AGU newsroom.

IMG_2116_Original_1830era_TideStaffScale_Plus_USS_constitution_photo_SA_Talke

IMG_2116_Original_1830era_TideStaffScale_Plus_USS_constitution_photo_SA_Talke

Boston dry dock with the U.S.S. Constitution. This photo shows the inlaid “tide staff”, the oldest tide gauge in the US, which has been there since about 1830. The top of the sea-wall, known as the coping, was built to withstand the highest floods known up to that time.
Credit: Stefan Talke