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Offshore Earthquake Lab
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The lab observes earthquakes and tsunamis on the seafloor.
AboutAbout the lab
Preparing for earthquakes and tsunamis from the seafloor
The Offshore Earthquake Lab investigates seismicity and subsurface structure through offshore observations of earthquakes and crustal deformation, and studies the source characteristics of earthquakes ranging from slow earthquakes to great earthquakes.
The lab aims to reduce disasters caused by megathrust earthquakes and tsunamis.
Key terms
- Slow earthquake
- A phenomenon in which a fault slips much more slowly than in an ordinary earthquake
- Megathrust earthquake
- A very large earthquake that occurs at the boundary where an oceanic plate sinks beneath another plate
- GNSS
- A system that uses radio signals from satellites to precisely measure positions on the ground and their movement
ResearchResearch themes
From offshore observations of earthquakes and crustal deformation, the lab clarifies the source characteristics of earthquakes ranging from slow earthquakes to great earthquakes.
*Illustrative imageKnowledge for preparing for earthquakes and tsunamis from the seafloor
Through offshore observations of earthquakes and crustal deformation, the lab investigates seismicity and subsurface structure, and conducts research to clarify the source characteristics of earthquakes ranging from slow earthquakes to great earthquakes.
*Illustrative imageTsunami observation and source estimation
The lab estimates a fault model of the 2024 Noto Peninsula Earthquake by combining tsunami, GNSS, and SAR data, studies the theory of tsunami observation using fiber-optic sensing, and studies shaking measurements that combine seafloor pressure gauges and seismometers.
*Illustrative imageNankai Trough great earthquakes and slow earthquakes
The lab discusses the characteristics of great earthquakes along the Nankai Trough, their relationship with slow earthquakes, and their predictability. It also pursues international joint research aimed at reducing earthquake and tsunami disasters along the coast of Mexico.
MembersFaculty
- ProfessorYoshihiro Ito
- Assistant ProfessorAyumu Mizutani
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Ocean Bottom Seismometer - Hongo Campus, the University of Tokyo - DSC04878” Daderot / CC0 (cropped)
- Knowledge for preparing for earthquakes and tsunamis from the seafloor: “Détails des sismomètres OBS (Ocean Bottom Seismometer) (Ifremer )” Olivier Dugornay (Ifremer) / CC BY 4.0 (cropped)
- Tsunami observation and source estimation: “Arica Tsunami Propagation” Ferdinand von Hochstetter ( ) / Public domain (cropped)
- Nankai Trough great earthquakes and slow earthquakes: “Wedge Boundary Strike-Slip Fault of Nankai Trough - Diagram” Takeshi Tsuji, Juichiro Ashi and Yasutaka Ikeda / CC BY 4.0 (cropped)
- Related lab (地球計測研究領域): “M≥ ) Earthquakes in the Ryukyu Arc” Matt.chw / CC BY-SA 4.0 (cropped)
- Related lab (地震情報研究領域): “Seismic Station ( )” daryl_mitchell from Saskatoon, Saskatchewan, Canada / CC BY-SA 2.0 (cropped)
- Related lab (内陸地震研究領域): “Gomura Fault Ikunouchi Site C” さか
おり / CC BY-SA 4.0 (cropped) - Related lab (断層物理研究領域): “Subduction Zone Stratovolcano” Wade Greenberg-Brand/Paleontological Research Institution / CC BY-SA 4.0 (cropped)
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