ドイツのライプニッツ海洋科学研究所（GEOMAR Helmholtz Centre for Ocean Research Kiel）のLaura Wallace特別教授が5月19日に防災研を訪問されます。
Wallace教授のご専門は、測地学でAGUの測地学分野のプレジデントをお務めになるなど、世界的に著名な研究者です。
https://www.geomar.de/lwallace

以下の特別セミナーを開催いたします。皆様是非ご参加ください。

日時：2025年5月19日　15:30-17:00
場所：防災研究所地震災害研究センター研究棟２階C200号室
形式：対面形式のみ
演題：Near-Trench megathrust slip processes from a decade of seafloor geodetic observations at the Hikurangi subduction zone, New Zealand
要旨：
Resolving the distribution of transient slow slip event (SSE) and interseismic coupling processes at offshore subduction zones is hampered by the difficulty of measuring offshore crustal deformation. Four methods are overcoming these challenges: (1) GNSS-Acoustic techniques to track the horizontal motion of the seafloor; (2) ocean bottom pressure sensors to discern cm-level seafloor pressure changes due to vertical deformation, (3) formation pore pressure changes in subseafloor IODP observatories as a proxy for formation volumetric strain, and (4) direct-path acoustic measurements to resolve mm-level changes in baseline length over short (a few km) baselines. All of these approaches have been employed (concurrently with deployment of ocean bottom seismometers) in several experiments over the last decade along the Hikurangi subduction zone offshore New Zealand, with the goal of capturing near-trench slip behavior and its relationship to seismicity. I will present new insights into shallow megathrust slip behavior (transient deformation and interseismic coupling) from the diverse array of seafloor geodetic deployments undertaken offshore New Zealand over the last decade. I will also discuss the integration of our seafloor geodetic observations with those from seismic imaging and scientific ocean drilling to help resolve the physical processes that influence subduction megathrust slip behavior.