marigramn.

1897 R. A. Harris Man. Tides ii. i, in Rep. Superintendent U.S. Coast & Geodetic Surv. 1897 (1888) App. ix. 485 in U.S. Congress. Serial Set (55th Congr., 2nd Sess.: Senate Doc. 345) XXIX An automatic tide gauge of any sort is sometimes called a marigraph, and the record produced by it a marigram.

1964 Science 145 261/2 The time scale of the marigram does not permit a precise determination of the time at which the waves occurred.

1966 J. F. Lander Tsunamis affecting Alaska 13 Additional reports were sought from contemporary sources, principally newspapers and marigrams.

1983 M. Okada & M. Tada in K. Iida & T. Iwasaki Tsunamis (Proc. Internat. Tsunami Symp. 1981) 121 The authors attempted to compile all the tsunamis which arrived at the tide station at Miyako into a single table, by examining all marigrams since 1937.

2018 E. Tolkova Tsunami Propagation Tidal Rivers i. 9 (caption) The high-frequency disturbance to what otherwise would be a smooth tidal curve represents the tsunami. Plotted from digitized marigrams.