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Earth and Planetary Physics Lab
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The lab explores Earth and planets through physics, from dust to planets and from magma to volcanic eruptions.

AboutAbout the lab
Exploring everything from planets to Earth through physics.
The Earth and Planetary Physics Lab is built on three research pillars: planetary science, complex systems geophysics, and the evolution of life and planets.
In planetary science, the lab regards Earth as one planet among many and explores what possible "Earths" might look like.
In complex systems geophysics, the lab studies the elementary physical processes and mechanisms that are important in Earth and planetary science.
In the study of the evolution of life and planets, the lab investigates the conditions for habitable planets and the interactions between Earth and the biosphere.
Key terms
- Rheology
- The study of how materials deform and flow
- Seismic waves
- Waves of shaking that are generated underground by fault slip, magma movement, and other causes, and travel through the ground
- Synchrotron X-ray CT
- A method that uses intense X-rays produced by an accelerator to image the inside of a sample in three dimensions without destroying it
NewsLab news
View More ↗ResearchResearch themes
The lab has set three research pillars through which its members can collaborate: planetary science, complex systems geophysics, and the evolution of life and planets. From how planets form to how earthquakes and volcanic eruptions occur, the lab investigates them through theory, numerical computation, seismic wave analysis, and experiments.
*Illustrative imageFrom Dust to Planets
The lab studies how planets form from dust grains as small as cigarette smoke particles. Using theory and numerical simulations, it aims to uncover the processes by which the Solar System and various other planetary systems came to their present forms.
*Illustrative imageProbing Volcanic Eruptions and Earthquakes with Seismic Waves
The lab observes and analyzes seismic waves to investigate how volcanic eruptions and earthquakes occur. Seismic waves are also generated by the movement of magma and by the boiling of underground water. The lab also conducts research to apply the knowledge and techniques it obtains to monitoring volcanoes and earthquakes around the world.
*Illustrative imageProbing Volcanic Eruptions and Magma through Experiments
The lab studies the mechanisms and triggers of volcanic eruptions through laboratory experiments and dimensional analysis. Its subjects also include observation of magma with synchrotron X-ray CT, the rheology of bubbly fluids, geothermal systems and geysers, and mantle convection.
MembersFaculty
The members of the Earth and Planetary Physics Lab are faculty, researchers, and doctoral and master's students.As of 2023
- ProfessorSeiichiro Watanabe
- ProfessorHiroyuki Kumagai
- Associate ProfessorShinichi Jono
- Associate ProfessorAtsuko Namiki
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: “Sizes of Solar System objects to scale” RedKire25 / CC BY 4.0 (cropped)
- From Dust to Planets: “Protoplanetary Disk XUE 1 (Artist Concept) (2023-152)” ESO/L. Calçada / CC BY 4.0 (cropped)
- Probing Volcanic Eruptions and Earthquakes with Seismic Waves: “Pswaves” No author given. PD beacause from https://earthquake.usgs.gov/ / Public domain (cropped)
- Probing Volcanic Eruptions and Magma through Experiments: “Sampling lava with hammer and bucket” Hawaii Volcano Observatory, USGS / Public domain (cropped)
- Related lab (Earth and Planetary Dynamics Lab): “001 Volcano eruption of Litli-Hrútur in Iceland in 2023 Photo by Giles Laurent” Giles Laurent / CC BY-SA 4.0 (cropped)
- Related lab (Global Water Cycle Science Division, Oceanography Lab): “Infrared satellite image from the Pacífic Ocean” GOES Satellites / Public domain (cropped)
- Related lab (Earth Water Cycle Science Division, Cloud and Precipitation Science Lab): “Ishigakijima meteorological radar 02” 人事院 / CC BY 4.0 (cropped)
- Related lab (Earth Evolution Group Lab): “AllendeMeteorite” H. Raab / CC BY-SA 3.0 (cropped)
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