Authors : Mario Batubara; Musthofa Lathif; Ibnu Fathrio; Masa-yuki Yamamoto; Islam Hamama

Volume/Issue : Volume 8 - 2023, Issue 8 - August

Google Scholar : https://bit.ly/3TmGbDi

Scribd : https://tinyurl.com/46c4v4pv

DOI : https://doi.org/10.5281/zenodo.8344568

Abstract : We report 2023 infrasound observations derived from ambient noise of the microbaroms between the north and south coasts of West Java province, Indonesia. Measurements were conducted out serially between May and August 2023, utilizing embedded infrasound sensors. Our microbaroms studies demonstrate that infrasound from the oceanic field causes frequent atmospheric pressure fluctuations of several millipascals at about 0.4 Hz. As a result, their amplitude appears to be quite dominant from twilight until the following morning, which is supposed to be dependent on the emergence of the atmospheric sound channels between the ground and the atmospheric level at a specific altitude. Theses channels are affected by the wind structure at top reflection point and atmospheric vertical temperature. The structure of wind and temperature in our geographical study, in the equatorial region, were proven to explain and distinguish the observed microbaroms by direct measurement of standard meteorology. Finally, we propose that the usage of our infrasound sensor will offer global complementary results for monitoring upper atmospheric dynamics.

Keywords : Microbaroms, infrasound, equatorial, vertical profile.