Solid Earth Sciences(S)
Session Sub-categoryScience of the Earth's Interior & Tectonophysics
Session IDS-IT24
TitleProbing the Earth's interior with geophysical observation on seafloor
Short TitleProbe Earth's interior from seafloor
Main ConvenerNameDaisuke Suetsugu
AffiliationDepartment of Deep Earth Structure and Dynamics Research, Japan Agency for Marine-Earth Science and Technology
Co-Convener 1NameGuilhem BARRUOL
AffiliationCNRS, Institut de Physique du Globe de Paris, France
Co-Convener 2NameHitoshi Kawakatsu
AffiliationEarthquake Research Institute, University of Tokyo
Co-Convener 3NameDouglas Wiens
AffiliationWashington University in St Louis
Session LanguageEE
ScopeMost important sites for plate tectonics and mantle dynamics studies (e.g., subduction zones, spreading ridges, and hot spots) are located in oceanic regions. The coverage of seismic stations is concentrated in land areas, which cover only one-third of Earth's surface. Since 1990s, technology for seafloor geophysical instruments to explore deep earth structure have been advanced, such as broadband ocean bottom seismographs (BBOBSs), ocean bottom electro-magnetometers (OBEMs), and pressure gauge, because observation network in oceanic regions is essential for major breakthroughs in Earth sciences. Technical advance in the instruments including cabled realtime seafloor networks have made the seafloor observation more common and reliable, which promotes a number of seafloor observations, both temporary and permanent networks, in the last decade. We call for papers on recent scientific results from such observation projects, including those on crust and mantle structure beneath subduction zones, hot spots, Large Igneous Provinces, and spreading ridges. Technical advances for observation in oceanic regions, including seafloor instruments and drifting float, proposals and plans for innovative observations are also welcome.
Presentation FormatOral and Poster presentation
Joint Session withAGU, EGU
Invited Authors
  • Guilhem BARRUOL (CNRS, Institut de Physique du Globe de Paris, France)
  • Guilhem BARRUOL (Institut de Physique du Globe de Paris, Sorbonne Paris Cité, UMR 7154 CNRS, Paris, France)
  • Rob L Evans (Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA)
  • Catherine Rychert (University of Southampton)
Time Presentation No Title Presenter Abstract
Oral Presentation May 22 AM1
09:00 - 09:15 SIT24-01Seismic attenuation in the mantle beneath the Ontong Java Plateau from multiple ScS wavesDaisuke Suetsugu Abstract
09:15 - 09:30 SIT24-02Retrieval of converted phases from shallow structure of the Ontong Java PlateauTakashi Tonegawa Abstract
09:30 - 09:45 SIT24-03Shear wave upper mantle structure beneath the Ontong Java PlateauTakehi Isse Abstract
09:45 - 10:00 SIT24-04Multifrequency P-wave tomography of Ontong Java PlateauMasayuki Obayashi Abstract
10:00 - 10:15 SIT24-05Noise removal from vertical component seismograms recorded by broadband ocean bottom seismometersYuki Kawano Abstract
10:15 - 10:30 SIT24-06The break-up of eastern Gondwana as viewed from northern ZealandiaBrian Boston Abstract
Oral Presentation May 22 AM2
10:45 - 11:05 SIT24-07Probing mantle structures beneath La Réunion hotspot from land and ocean bottom observations: results from the RHUM-RUM experimentGuilhem BARRUOL Abstract
11:05 - 11:20 SIT24-08Plume-ridge connection: seismic evidence for an asthenospheric flow between La Réunion and the Central Indian RidgeGuilhem BARRUOL Abstract
11:20 - 11:35 SIT24-09Marine magnetotelluric data supports melt at the LAB as the origin of the petit-spot in the northwestern PacificKiyoshi Baba Abstract
11:35 - 11:55 SIT24-10Electromagnetic Imaging of Fluids in Subduction Zones and the Effect of Anomalous Seafloor on Electrical AnomaliesRob L Evans Abstract
11:55 - 12:15 SIT24-11Seismic Imaging of the Lesser Antilles Subduction Zone with the VOILA ProjectCatherine Rychert Abstract
Presentation No Title Presenter Abstract
Poster Presentation May 22 Core Time
SIT24-P01 The OJP array: seismological and electromagnetic observation on seafloor and islands in the Ontong Java Plateau Daisuke Suetsugu Abstract
SIT24-P02 The initial report of the electromagnetic observation on the seafloor in the Ontong Java Plateau Noriko Tada Abstract
SIT24-P03 Shear wave splitting observed in the Ontong Java Plateau and adjacent regions Satoru Tanaka Abstract
SIT24-P04 Sedimentary structure and tectonic setting of the Lyra basin central-western Pacific Ocean Shoka Shimizu Abstract
SIT24-P05 sPL waves observed by the OJP array in the Ontong Java Plateau Minoru Kobayashi Abstract
SIT24-P06 OBS Orientation from Ship Noise Polarization Guilhem BARRUOL Abstract
SIT24-P07 Toward complete tomography of the Earth’s interior with floating robotic acoustic sensors in the oceans: the EarthScope-Oceans Masayuki Obayashi Abstract
SIT24-P08 Seafloor electromagnetic investigations of the upper mantle of the Mariana back-arc spreading and subduction system Tetsuo Matsuno Abstract
SIT24-P09 3D gravity modeling of crustal structures beneath the Southwest Indian Ridge Doo-Hyun Kang Abstract