Solid Earth Sciences (S)
Session Sub-category Seismology (SS)
Session ID S-SS03
Title Seismological advances in the ocean
Short Title Seismological advances in the ocean
Main Convener Name Lina Yamaya
Affiliation National Research Institute for Earth Science and Disaster Resilience
Co-Convener 1 Name Takashi Tonegawa
Affiliation Research and Development center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology
Co-Convener 2 Name Tatsuya Kubota
Affiliation National Research Institute for Earth Science and Disaster Resilience
Session Language
E
Scope
Advances in ocean-bottom seismic observations with seismometers, hydrophones, and pressure gauges have provided us with the opportunity to study seismicity, subsurface structures, earthquake and tsunami generation, and wave phenomena in offshore areas. Permanent (cabled) observatories enable long-term monitoring for these targets, and deployments of dense temporary arrays or fiber optic technologies produce higher-resolution researches. Also, such developments in ocean seismology have invoked the community to create data processing and analyzing techniques. The purpose of this session is to share recent advances in the ocean seismology, such as seismicity, seismic velocity structure conducted from active and passive approaches, progresses in the development of seafloor instrumentation, processing and analyzing techniques for offshore seismic datasets, findings of submarine earthquakes and tsunamis, observation of the seafloor strong motion, characterization of ambient noise and interpretation of its sources, propagation processes of various waves in the atmosphere, ocean, and solid Earth recorded by ocean instruments, and all relevant topics. This session welcomes observation or analysis of enigmatic phenomena such as the 2023 Torishima earthquake. We recommend presentations by early-career researchers and students who would like to try the presentation in an international session.
Presentation Format Oral and Poster presentation
Invited Authors Ana Ferreira (University College London)
Yoshiaki Matsumoto (Tohoku University)
Dan Bassett (GNS Science)
Shukei Ohyanagi (Graduate School of Science, Kyoto University)
Time Presentation No Title Presenter
Oral Presentation May 27 PM1
13:45 - 14:00 SSS03-01 Hypocenter determination using S-net data of shallow earthquakes off Fukushima and Ibaraki prefectures, Japan Yoshiaki Matsumoto
14:00 - 14:15 SSS03-02 Shallow tectonic tremor activity in Off Sanriku, near the Japan Trench: does tremor occur in the tsunami earthquake source regions? Shukei Ohyanagi
14:15 - 14:30 SSS03-03 Offshore seismic activity in the vicinity of Monday Seamount in October 2006 from detailed epicenter distribution Tetsuya Aoyama
14:30 - 14:45 SSS03-04 High-resolution CMT inversion for shallow offshore earthquake utilizing ocean-influenced Rayleigh wave thanks to thick seawater layer Lina Yamaya
14:45 - 15:00 SSS03-05 Spectral characteristics, time variations and estimation of source directions of marine microseisms recorded in Cuba Viana Poveda Brossard
Oral Presentation May 27 PM2
15:30 - 15:45 SSS03-06 Evidence of a shear zone inside the Philippine Sea plate slab in Suruga Bay, provided by long term OBS observations. Yannis Panayotopoulos
15:45 - 16:00 SSS03-07 Crustal scale controls on megathrust slip behaviour - Insights from margin-wide high-resolution tomography of Nankai Trough and the Hikurangi subduction zone Dan Bassett
16:00 - 16:15 SSS03-08 Lithosphere and Asthenosphere Seismic Structure Beneath the Hawaiian Swell from Rayleigh Wave Dispersion Kai Xun Chen
16:15 - 16:30 SSS03-09 Low-Velocity Anomalies beneath the Outer-Rise Regions: A New Type of Abnormal Oceanic Mantle Nozomu Takeuchi
16:30 - 16:45 SSS03-10 The UPFLOW experiment: Peeking from the sea floor to the deep mantle with an ∼1,500 km aperture array of 50 ocean bottom seismometers in the mid-Atlantic Ana Ferreira
Presentation No Title Presenter
Poster Presentation May 27 PM3
SSS03-P01 Estimations for seismic energy and source duration of shallow tremors along the Nankai Trough incorporating the effects of thick sedimentary layer Shunsuke Takemura
SSS03-P02 Monitoring of shallow tremors along the Nankai Trough and identification of false detections Koji Tamaribuchi
SSS03-P03 Detection of slow slip event from seafloor pressure record using PCA: A case study in Hikurangi Subduction zone Hideto Otsuka
SSS03-P04 Ocean infragravity waves at seafloor DONET stations Hou-Sheng Cheng
SSS03-P05 Empirical Green's Function Retrieval of Infra-gravity Waves in the Pacific Ocean via Ambient Noise Interferometry Kun Chi Ho
SSS03-P06 Infragravity wave generation and propagation in the Pacific Ocean revealed by ambient noise correlation Kai Xun Chen
SSS03-P07 Noise on Ocean Bottom Seismometers: Observations and New Directions Helen A Janiszewski
SSS03-P08 Space-time monitoring of seafloor shear-wave velocity changes using seismic ambient noise Peng Guo
SSS03-P09 Spatio-temporal seismic structural variations and its interpretation revealed from seismic interferometry using OBS records around the northern Japan Trench Ryosuke Azuma
SSS03-P10 Seafloor Rayleigh ellipticity, measured from unoriented data, and its significance for passive seismic imaging in the ocean Sanxi AI
SSS03-P11 High-resolution Tomographic Imaging of the Indo-Australian Plate with Multimode Surface Waves Debasis D Mohanty
SSS03-P12 The Oldest-2 array observation: Second seafloor observation to study the lithosphere–asthenosphere system beneath the oldest Pacific Ocean Takehi Isse
SSS03-P13 Seismic and thermal structure imaging in NE Japan: New insights into slab melting and arc magmatism Zhi Wang