On the correlation between microbaroms and microseism, and what can we learn from it

Abstract

Wind-driven ocean swells act as the source for both atmospheric microbaroms and solid earth’s microseisms. Since they share the same source, microbaroms and microseisms’ power are expected to display similar characteristics in collocated seismo-acoustic stations. Any deviation from this hypothesis can provide information about the source mechanism, the state of the atmosphere, and the seismo-acoustic energy partitioning at the source region. In addition, prolonged observations may show evidence of climatic trends. This study presents a multi-year (∼20 years) comparison between microbaroms and microseisms’ power in collocated seismo-acoustic stations. Initial results show that sporadically, microbaroms and microseisms’ power can be in and out of phase up to 180 degrees. Moreover, stations’ spatial location seems to affect the observations and will be further investigated.