14:00 〜 14:15
[MTT37-02] Crustal Deformation around the Western Nagaoka Plain Fault Zone based on Densified GNSS Observation Network
キーワード：GNSS、地殻変動、長岡平野西縁断層
The Western Nagaoka Plain Fault is in an active deformation zone in the Mid-Niigata region where the 2004 Chuetsu and the 2007 Chuetsu-oki earthquakes happened. The existence of active folding and inelastic deformation has been pointed out by previous studies. For a better understanding of ongoing crustal deformation and stress build-up, dense GNSS observation is highly useful. In this area, The Association for Earthquake Prediction and Nagoya University have been operating 20 continuous GNSS sites since 2010. In this study, we also analyze data from 30 stations of a dense GNSS network operated by SoftBank Corp.
We processed the raw GNSS data during 2019-2022 with the Bernese GNSS software version 5.4 with the Precise Point Positioning approach. We discuss the quality of the daily coordinate solutions, velocities as well as strain rates around the fault zone. The potential of the densified GNSS network for tectonic studies will be also discussed.
We processed the raw GNSS data during 2019-2022 with the Bernese GNSS software version 5.4 with the Precise Point Positioning approach. We discuss the quality of the daily coordinate solutions, velocities as well as strain rates around the fault zone. The potential of the densified GNSS network for tectonic studies will be also discussed.