Fig. 8

Time series of correlations between cluster-A waveforms and the 3-month continuous record. Correlation coefficients (CCs) > 0.7 are shown for both UD (red circles) and horizontal waveform components (black circles). a Event 1 waveforms recorded at site 6, b event 2 recorded at site 6, c event 13 recorded at site 6, and d event 6 recorded at site 7 (see Table 1 for descriptions of these events). Histograms of daily frequency of CCs greater than 0.7 (blue) and greater than 0.8 (orange) for both components are also shown