Extended Data Fig. 1: Example wavelet analysis and filtered time series data.
From: Diverse tsunamigenesis triggered by the Hunga Tonga-Hunga Ha’apai eruption
a, b, Data for Wellington Harbor, New Zealand showing the (a) wavelet result derived from the (b) observed tide station data obtained from New Zealand’s GeoNet. In the wavelet analysis, note the horizontal banding of energy, indicating the excitation of the resonant modes of the harbor, and the clear increase in energy between 20:00 and 23:00 UTC. c, d, Data for DART NZG showing the (c) wavelet result derived from the (d) observed DART sensor data from GeoNet. The parabolic black lines found on the lower left and right corners of the wavelet plot denote areas of the wavelet surface that may suffer from tapering effects. The white areas identify times of no data from the sensor. The wavelet surface shows the energetic initial arrival of the tsunami with periods of 10–20 min near 05:00 UTC, followed by pulses of energy in the 3–5 min period range.
