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Araya Lab
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The lab measures subtle changes in the Earth using laser light.
AboutAbout the lab
Measuring the Earth's interior with new instruments
To understand the Earth's internal structure and crustal activity, the Araya Lab develops new observation instruments and carries out observations with them.
In particular, the lab uses state-of-the-art optical measurement technology such as laser interferometers.
This allows measurements not only with high performance, but also in extreme environments such as deep underground or on planetary surfaces.
The lab aims to reveal what kinds of phenomena can be observed in domains that could not be measured before.
Key terms
- Laser interferometer
- A device that measures extremely small changes in length by using how laser beams overlap (interference)
- Earth tides
- A phenomenon in which the Earth itself stretches and contracts slightly due to the gravitational pull of the Moon and the Sun
- Absolute gravimeter
- A device that drops an object in a vacuum and measures its motion with a laser to determine the magnitude of gravity directly
ResearchResearch themes
To understand the Earth's crustal activity and internal structure, the lab develops new observation instruments and carries out observations with them. Using optical measurement technology such as laser interferometers, it aims to acquire data at levels of precision and in locations that were previously out of reach.
*Illustrative imageMeasuring crustal movement with a long laser strainmeter
The lab uses laser interference to measure the stretching and contraction of the ground with high precision. With a laser strainmeter built in an underground tunnel in Kamioka, Gifu Prefecture, it continues to observe phenomena such as Earth tides and crustal deformation accompanying earthquakes.
*Illustrative imageDeveloping a compact absolute gravimeter
When magma or groundwater moves underground, gravity at the surface changes slightly. The lab is developing an absolute gravimeter that is compact, low-cost, and can be deployed as a network, with the aim of directly capturing the movement of magma in volcanoes.
*Illustrative imageMeasurement technology for extreme environments
Using laser measurement, the lab is developing a seismometer that can make precise observations even in the high-temperature environments deep underground. It is also considering applications to planetary exploration.
MembersFaculty
- ProfessorAkito ArayaPublications ↗
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Write a lab reviewAnonymous · Your draft is saved if you stopRelatedLabs similar to Araya Lab
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Takeuchi LabFaculty of Science, Department of Earth and Planetary PhysicsSeismology (seismic tomography, deep Earth structure)The information on this page is compiled by the LabLog team from the lab's public information and interviews. For corrections or removal requests, please contact LabLog, not the lab.
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: “Interferenz-michelson” FL0 / CC BY-SA 3.0 (cropped)
- Measuring crustal movement with a long laser strainmeter: “Michelson interference laser” Prolineserver / CC BY-SA 3.0 (cropped)
- Developing a compact absolute gravimeter: “Quartz gravimeter pendulums” US Coast and Geodetic Survey / Public domain (cropped)
- Measurement technology for extreme environments: “PIA22871 Full View of InSight's Deck and Two Science Instruments” NASA/JPL-Caltech / Public domain (cropped)
- Related lab (Mochizuki Lab (Marine Seismology)): “Test des sismomètres OBS (Ocean Bottom Seismometer) en bassin d'essais (Ifremer )” Olivier Dugornay (Ifremer) / CC BY 4.0 (cropped)
- Related lab (Nakatani Lab): “Fault slickenside (Great Smoky Mountains, Tennessee-North Carolina, USA) 1” James St. John / CC BY 2.0 (cropped)
- Related lab (Fukuda Lab (Earthquake Occurrence Prediction Research Center)): “GEONET Continuously Operating Reference Station Ibusuki”
あじさか / CC BY-SA 4.0 (cropped) - Related lab (Takeuchi Lab): “Terrestrial Planet Interiors (Earth, Mars and Moon) - Artist's Concept” NASA/JPL-Caltech / Public domain (cropped)
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