TITLE:
Infrasound Signals and Their Source Location Inferred from Array Deployment in the Lützow-Holm Bay Region, East Antarctica: January-June 2015
AUTHORS:
Takahiko Murayama, Masaki Kanao, Masa-Yuki Yamamoto, Yoshiaki Ishihara
KEYWORDS:
Infrasound, Array Observations, Lützow-Holm Bay, East Antarctica, Microbaroms, Ice Shocks, Surface Environment
JOURNAL NAME:
International Journal of Geosciences,
Vol.8 No.2,
February
15,
2017
ABSTRACT: Characteristic features of infrasound waves observed in the Antarctic represent a physical interaction relating surface environment in the continental margin and surrounding Southern Ocean. Source location of several infrasound events is demonstrated by using combination of two array deployments along a coast of the Lützow-Holm Bay (LHB), East Antarctica, for data retrieving period in January-June 2015. These infrasound arrays being established in January 2013 clearly detected temporal variations in frequency content and propagation direction of the identified seven large events. Many of these sources are assumed to have cryoseismic origins; the ice-quakes associated with calving of glaciers, discharge of sea-ice, collision between sea-ice and icebergs around the LHB. Detail and continuous measurements of infrasound waves in the Antarctic are a proxy for monitoring regional environment as well as climate change in high southern latitude.