Overview

• Australian National University researchers used spiral-arm seismometer arrays in Australia to detect seismic PKP waves generated by North Atlantic winter storms.
• The study identified southern Greenland and Newfoundland as key source regions for these microseismic signals.
• PKP waves, with periods of four to six seconds, were detected despite their low amplitude using specialized equipment in remote, quiet locations.
• This method provides a novel alternative to earthquake-based seismic studies and could be applied to explore planetary and moon interiors lacking tectonic activity.
• The findings, published in *Seismological Research Letters*, mark a significant step in advancing geophysical research and planetary science.