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Kanda Lab
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The lab probes beneath volcanoes with electromagnetic methods to understand how eruptions work.
AboutAbout the lab
Exploring the invisible interior of volcanoes with electromagnetics.
The Kanda Lab studies the underground structure of volcanoes and the mechanisms leading up to eruptions.
It mainly uses electromagnetic methods to investigate the hidden areas beneath the ground.
The main targets are volcanoes that repeatedly produce phreatic eruptions, with research under way at Kusatsu-Shirane, Midagahara, Adatara, and others.
Prof. Kanda is based at the Kusatsu-Shirane Volcano Observatory in Gunma Prefecture and also supervises the research of students in the Department of Earth and Planetary Sciences.
Key terms
- Phreatic eruption
- An eruption caused by rising pressure of hydrothermal water and volcanic gas underground. How it occurs is still not well understood.
- Geomagnetic field
- The Earth's magnetism. Rock beneath a volcano loses its magnetism when heated, so changes in it reveal the state of heat underground.
- Caldera
- A large depression in a volcano formed by events such as a major eruption.
NewsLab news
A new view of the magma supply system is proposed based on the subsurface structure of Sakurajima and Kirishima volcanoes
A paper by Prof. Kanda et al. was published in Journal of Geophysical Research: Solid Earth
A paper by Prof. Kanda et al. was published in the journal Kazan
A paper by Assistant Professor Narita et al. was published in Earth, Planets and Space
ResearchResearch themes
The lab studies the structure of volcanoes and the processes leading up to eruptions through electromagnetic observation. Together with collaborators, it surveys subsurface structure and observes the geomagnetic field at volcanoes that repeatedly produce phreatic eruptions and at others.
*Illustrative imageNext-Generation Volcano Research and Training
The lab participates in a volcano research project conceived after the Mt. Ontake eruption disaster, working on technologies to understand the internal structure and state of volcanoes and on training the next generation of volcano experts.
*Illustrative imageBeneath Where Phreatic Eruptions Occur
To understand how phreatic eruptions work, the lab investigates the structure beneath craters. At Jigokudani in Midagahara, it found a "cap structure," a lid-like layer that traps volcanic gas.
*Illustrative imageHow Heat Builds Up at Kuchinoerabu-jima
By continuously observing the geomagnetic field at the summit of the volcanic island Kuchinoerabu-jima, the lab proposed how heat accumulates toward an eruption, based on changes in underground rock losing its magnetism through heating.
*Illustrative imageExploring Magma Beneath Aira Caldera
At Aira Caldera, north of Sakurajima, the lab measures electromagnetic fields, including with instruments placed on the seafloor, to investigate underground structures such as the magma chamber and the pathway that supplies magma to Sakurajima.
MembersFaculty
- ProfessorWataru KandaPublications ↗
- Assistant ProfessorShohei NaritaPublications ↗
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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: “Kuchinoerabujima island from Mt.Nagatadake” As6022014 / CC BY-SA 3.0 (cropped)
- Next-Generation Volcano Research and Training: “2014 Mount Ontake eruption (October 4)” Alpsdake / CC BY-SA 4.0 (cropped)
- Beneath Where Phreatic Eruptions Occur: “Tateyama jigokudani fumarole” GcG(WPJA) / CC BY-SA 3.0 (cropped)
- How Heat Builds Up at Kuchinoerabu-jima: “Kuchinoerabu Island aerial photo 2018” 海上保安庁 / CC BY 4.0 (cropped)
- Exploring Magma Beneath Aira Caldera: “Sakura-jima from space” NASA/JPL-Caltech / Public domain (cropped)
- Related lab (太田研究室): “DiamondAnvilCell 003” National Institute of Standards and Technology / Public domain (cropped)
- Related lab (中本研究室): “Artist’s impression of protoplanetary disc (weic2329a)” ESO/L. Calçada / CC BY 4.0 (cropped)
- Related lab (奥住研究室): “HL Tau protoplanetary disk” ALMA (ESO/NAOJ/NRAO) / CC BY 4.0 (cropped)
- Related lab (玄田研究室): “The Earth seen from Apollo 17” NASA/Apollo 17 crew / Public domain (cropped)
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