Fig. 3: Microseism trend results by station (red: positive; cyan: negative) sorted from most postive to most negative.
From: Increasing ocean wave energy observed in Earth’s seismic wavefield since the late 20th century
a, b Acceleration amplitude percentage trends (Fig. 2b; Table 2; equation (2)) for absolute and percentage trends, RA and PA, respectively. c, d Energy (velocity amplitude squared) absolute and percentage trends RE and PE (Fig. 2c; Table 3; equation (3)). Blue and black data points and accompanying 3σ error bars reflect estimates obtained using the complete time series A(t) and E(t) and those obtained with associated seasonal harmonic trends (equation (1)) subtracted as indicated in subfigure legends. x axis rank indicates the largest-to-smallest order of trends fitted to data with stationary seasonal components subtracted (black data points).
