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Shiobara Lab (Ocean Bottom Seismic Observation and Development)
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The lab develops ocean bottom seismometers to reveal the structure of Earth's interior beneath the sea.
AboutAbout the lab
Placing seismometers on the seafloor to probe Earth's interior
The Shiobara Lab studies the structure of Earth's interior beneath the ocean, building on its development of ocean bottom seismometers (OBS).
Seventy percent of Earth's surface is covered by ocean, and observations on land alone cannot reveal the fine structure of the mantle beneath the sea.
The lab develops and improves broadband ocean bottom seismometers that can record ground motion over a wide range of periods for long durations, and uses them to aim to reveal the structure of the mantle beneath the oceans.
Because observations at sea require collaboration, the lab carries out its research as a group together with researchers in marine seismology.
Key terms
- Ocean bottom seismometer
- A seismometer placed on the seafloor to record the shaking of earthquakes. It is retrieved by ship after the observation period
- Mantle
- The thick layer of rock beneath Earth's crust. It makes up most of Earth's volume
- Plate tectonics
- The theory that explains earthquakes, volcanoes, and changes in the land through the movement of the many rigid slabs of rock (plates) that cover Earth's surface
NewsLab news
View More ↗ResearchResearch themes
Rooted in the development of ocean bottom seismometers, the lab aims to reveal the structure of Earth's interior beneath the ocean, which cannot be known from land-based observations alone. Its current research themes are the development and improvement of long-term, broadband ocean bottom seismometers, and the use of these instruments to clarify the structure of the mantle beneath the oceans.
*Illustrative imageDevelopment of Long-Term, Broadband Ocean Bottom Seismometers
As a foundation for investigating Earth's interior beneath the sea, the lab works on developing and improving ocean bottom seismometers that can record ground motion over a wide range of periods for long durations. Because observations at sea require collaboration, the lab carries out its research as a group together with researchers in marine seismology.
*Illustrative imageMantle Structure Beneath the Oceans
To understand Earth's history, the lab investigates the structure of Earth's interior from the perspectives of plate tectonics and plume tectonics. To capture the fine structure of the mantle beneath the oceans, it makes observations with long-term, broadband ocean bottom seismometers while improving the quality of the recordings.
MembersFaculty
- ProfessorHajime ShiobaraPublications ↗
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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: “Campagne MAYOBS15 - Préparation des OBS (Ocean Bottom Seismometer) (Ifremer )” Ifremer / CC BY 4.0 (cropped)
- Development of Long-Term, Broadband Ocean Bottom Seismometers: “Ocean Bottom Seismometer made by ERI, U-Tokyo” Theodore Xu / CC BY-SA 4.0 (cropped)
- Mantle Structure Beneath the Oceans: “Hawaii hotspot cross-sectional diagram” Joel E. Robinson, USGS. / Public domain (cropped)
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