Analysis of GNSS Time Series Recorded on South Shetland Island and Antarctic Peninsula during the Geodynamic Activity in 2020 of the Orca Underwater Volcano (Brandfield Sea Rift, Antarctica)

Engineering Proceedings

article

Belén Rosado¹  Alejandro Pérez-Peña¹  Paola Barba¹  Javier Ramírez-Zelaya¹  Enrique Carmona²  Rosa Martín²  Vanessa Jiménez²  Jorge Gárate¹  Amós de Gil¹  Manuel Berrocoso¹ 

[1] Laboratorio de Astronomía, Geodesia y Cartografía, Departamento de Matemáticas, Facultad de Ciencias, Campus de Puerto Real, Universidad de Cádiz;Instituto Andaluz de Geofísica, Universidad de Granada

关键词: GNSS system;    geodetic time series;    geodynamic;    volcano–tectonic deformation;   

DOI  :  10.3390/engproc2023039025

来源: mdpi

【 摘 要 】

The region defined by the South Shetland Islands, Bransfield Sea, and Antarctic Peninsula has complex geodynamic activity resulting from the active subduction process of the Phoenix Plate under the Antarctic Plate. This subduction produces a rift of expansion along the Bransfield Sea basin between the South Shetland Islands and the Antarctic Peninsula. There is also a chain of submarine (Orca, Three Sisters, and Building A) and emerged (Deception and Pinguin) volcanoes. In 2020, there was intense seismic activity around the Orca volcano with earthquakes of up to 6.9 Mw. This paper presents displacement models of this seismic activity produced in the region. The geodetic time series of the GNSS stations located in the region were analyzed: UYBA at the Uruguayan Artigas Antarctic Base (King George Island) and PAL2 at the U.S. Palmer Antarctic Base (Anvers Island). These data were taken from the Nevada Geodetic Laboratory.

【 授权许可】

Unknown