Fig. 10From: DigitSeis: software to extract time series from analogue seismogramsAn example of crossing/touching traces. A portion of the long-period north–south recording from BKS (Berkeley, CA) on February 11, 1964. One can take advantage of the time marks that are horizontally offset for each trace to unravel most parts of this image, but if time marks were occurring at the same horizontal position, one would have a hard time separating the tracesBack to article page