Advances in seismometry and recording systems have greatly increased the range of signals that can be recorded by strong-motion instruments. This increased range has practical implications for observational weak-motion seismology, as we demonstrate in this study. Analog strong-motion instruments, the most common type in use until the 1990s, had an effective bandwidth from ∼ 0.1–0.2 Hz to 25–50 Hz and a dynamic range of 40 to 60 dB (Heaton et al. 1989; Trifunac and Todorovska 2001). By contrast, modern 16- and 24-bit digital strong-motion instruments have bandwidths from DC to 80 Hz (at 200 sps) and a...

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