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Fig. 6 | Earth, Planets and Space

Fig. 6

From: A quest for unrest in multiparameter observations at Whakaari/White Island volcano, New Zealand 2007–2018

Fig. 6

a Seismic velocity variations (single station cross-component approach). b Cross Correlation Coefficient (CCC) between the reference function (entire time period) and the current function (0.1–1.0 Hz). The black and red lines correspond to the daily mean values across different combinations of components (EN, EZ and ZN) smoothed using a Hodrick–Prescott filter with different values, 500,000 and 100,000,000, respectively. See Fig. 4 for the description of the vertical lines corresponding to key time periods

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