Fig. 7: Monthly vessel counts at Axial Seamount.
From: North Pacific Ocean sound levels 2018–2022: COVID-19 pandemic impacts on anthropogenic noise
Counts of ships derived from the AIS44 for all ships within a 222 × 222 km square area centered on the hydrophone mooring location at Axial Seamount during 2019–2023 (Table 3). Histograms here highlight the significantly lower ship count at Axial as compared to OCNMS (entrance to the Straits of Juan de Fuca). A seasonal pattern with peak ship activity occurring during May–October similar to OCNMS is also observed.
