Fig. 4

a Comparisons of the observed and synthetic velocity waveforms with several different passbands for EV2003. Here, we show the three components from two of the F-net broadband stations (TYS and HRO); for all thirty-three components, see Additional file 1: Fig. S3. The FAMT parameters are used to generate the synthetic waveforms. The passbands for each pair from top to bottom are 2–4, 4–7, 7–10, 10–15 and 4–40 s, respectively. The symbols “P” and “S” at the top traces denote the onsets of the P- and S-wave packets, respectively. b Same as a but for EV2007. For all forty-two components, see Additional file 1: Fig. S4. c The normalized residuals (F in Eq. 1) for EV2003. The residuals are computed using all the full waveforms of the 33 components with all the weights set to 1. Narrow-band cases are denoted by red squares, and broadband cases are denoted by blue squares. d Same as c but for EV2007. The residuals are computed using all the full waveforms of the 42 components