MOESM4 of Karachi tides during the 1945 Makran tsunami

Additional file 4: Table S1. Times and heights from a digitized tracing of the Karachi marigram for November 15 to December 1, 1945, compared with the tidal curve accepted for use in this paper. The difference is the residual that is plotted, along with the digitized tracing and the Accepted Tide, in parts a and b of Fig. 5. Height datum assumed to be that of Admiralty chart 40. (Caution to Apple users: In the Microsoft date-and-time convention of this spreadsheet, and in Tables S2 and S3 as well, dates formatted a single series of numbers start 4 years earlier, on January 1, 1900, than in the 1904 date system used in Excel for Macintosh.). Table S2. Accepted tide for all times between November 15 and December 1, evaluated at intervals of 1 min. Table S3. Five representations of heights and times and heights of high waters and low waters between November 15 and December 1, 1945: (a) predictions in Admiralty tide tables for Karachi (Hydrographic Department 1944); (b) manual measurements on the Karachi marigram; (c) quadratic fits to a digitized tracing of the marigram; (d) computations made where the marigram lacks tidal measurements (control points 21, 22, 31, and 32), or where the tsunami perturbs the marigram curve (control points 51–57); and (e) times and heights that control the piecewise cubic spline of the Accepted Tide in Table S2. The control points for this spline: 0, 1, and 64 from (a); 21, 22, 31, 32, and 51–57 from (d); and all others from (c).