17:15 〜 19:15
[SSS05-P02] Advance in Seismic Observation around Syowa Station, the Lützow-Holm Bay, East Antarctica
キーワード：Syowa Station、Lützow-Holm Bay、East Antarctica、teleseismic data、International Seismological Centre、FDSN
Seismic observation at Syowa Station (69.0°S, 39.6°E; SYO), the Lützow-Holm Bay (LHB), East Antarctica started since 1959 associated with the International Geophysical Year (IGY; 1957-1958) campaign. Since the establishment of INTELSAT telecommunication link, digital waveform data have been transmitted to the National Institute of Polar Research (NIPR) for the utilization of phase identification more clearly. Arrival-times of the teleseismic phases, such as P, PKP, PP, PKKP, S, SKS have been detected with reporting to the International Seismological Centre (ISC), then published as the “Data Reports” by NIPR. Seismic phase travel time data incorporated with annual catalogs of detected teleseismic earthquakes are particularly focused on, besides with data utilization for public usage. Recorded waveform data, seismic-phase travel-times and corresponding earthquake catalogs have sufficient quality for many analyses involving dynamics and structure of the Earth viewed from Antarctica. The continuously recorded data for a few decades after IGY have been utilized not only to the lithospheric studies but also to the Earth’s deep interiors, which has significant contribution to the Federation of Digital Seismological Networks (FDSN) from high southern latitude.
Field observations by portable broadband seismometers have been carried out at several outcrops near SYO, around the Soya Coast in LHB since 1996. The recording system was composed of a three-component portable broadband seismometer, a digital recording unit and solar power supply. These data are of good enough quality to be used for various waveform analyses to clarify the heterogeneous structure of the crust and the upper mantle of the Antarctic region. These observations have been contributing to the international Antarctic programs (POLENET, SERCE, etc.) .
In this presentation, advances in seismic observation networks around the SYO, in LHB and surrounding regions in Antarctica are introduced associated with scientific linkages other regional and global seismic networks.
Field observations by portable broadband seismometers have been carried out at several outcrops near SYO, around the Soya Coast in LHB since 1996. The recording system was composed of a three-component portable broadband seismometer, a digital recording unit and solar power supply. These data are of good enough quality to be used for various waveform analyses to clarify the heterogeneous structure of the crust and the upper mantle of the Antarctic region. These observations have been contributing to the international Antarctic programs (POLENET, SERCE, etc.) .
In this presentation, advances in seismic observation networks around the SYO, in LHB and surrounding regions in Antarctica are introduced associated with scientific linkages other regional and global seismic networks.