Fig. 5

Digitization Example 2: 1945 Trinity Nuclear Test. Digitization of the right side from the 35 mm microfilm copy of the short-period vertical record from Tucson, Arizona, covering the time between 14:17 on July 15 to 14:35 on July 16, 1945. The features are the same as in Fig. 4 except that only the image part of the DigitSeis screen is shown and the digitized traces are displayed with green and blue colors. There is a trace that is shown with white color to emphasize the blast signals associated with the Trinity nuclear detonation at 11:30 UTC. The time stamps are provided at 30-minute intervals. Short segments that appear regularly above the digital traces are the time marks in the background image. See Fig. 3 for the digitization result using the full photographic paper record