Exploring the Deep Ocean Single‐Frequency Microseisms Southwest of Japan in Northern Philippine Sea

Abstract

Microseisms are seismic noise excited by the ocean waves acting on the seabed, which can be observed all over the world. The spectrum of microseisms usually contains two prominent peaks, single-frequency microseisms (SFMs, 0.05-0.1 Hz) and double-frequency microseisms (DFMs, 0.1-0.5 Hz), which are also termed as primary and secondary microseisms, respectively (e.g.,