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Geophysics Lab
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The lab explores the Earth's past, earthquakes, and volcanoes through the geomagnetic field and paleoenvironments.
AboutAbout the lab
Learning about the Earth's past to find clues for the future.
Professor Masao Ohno, a geophysicist, studies the Earth using keywords such as the geomagnetic field, paleoenvironments, and archaeomagnetism.
The lab examines rocks, sediments, and the kiln remains and pottery of human archaeological sites using paleomagnetism, and explores past variations in the geomagnetic field and their mechanisms.
From the analysis of seabed sediments, the lab studies changes in paleoclimate and paleoenvironments, and from the analysis of underground water and gas, it studies earthquake and volcanic activity.
In earth science research, the lab works with many researchers and staff on observation, sample collection, and analysis.
Key terms
- Paleomagnetism
- The study of the Earth's past magnetic field as recorded in rocks, sediments, pottery, and similar materials
- Archaeomagnetism
- Paleomagnetism applied to objects such as kiln remains and pottery at archaeological sites. It is used to determine the age of sites
- Isotopic composition
- The mixture of atoms of the same element that differ in weight
ResearchResearch themes
Knowing the Earth's past is a major clue for predicting the future. Using clues such as the paleomagnetism of rocks, sediments, and the kiln remains and pottery of archaeological sites, as well as the chemical composition of underground water and gas, the lab investigates variations in the geomagnetic field, paleoenvironments, and earthquake and volcanic activity.
*Illustrative imageDating archaeological sites by archaeomagnetism
The lab studies the kiln remains and pottery of human archaeological sites using paleomagnetic methods to determine the age of the sites.
*Illustrative imageVariations in paleoenvironments
Through rock magnetic analysis of seabed sediments, the lab investigates how past climate and environments have changed. It uses methods from rock magnetism and environmental magnetism.
*Illustrative imageExploring earthquakes and volcanic activity through groundwater
Using methods of groundwater and geochemistry, which analyze the chemical composition and isotopic composition of underground water and gas, the lab studies earthquake and volcanic activity.
*Illustrative imageVariations in the geomagnetic field
The lab examines rocks, sediments, and lava using paleomagnetism to reconstruct past variations in the geomagnetic field and explore their mechanisms.
MembersFaculty
- ProfessorMasao Ohno
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: “Tavurvur volcano edit” Taro Taylor edit by Richard Bartz / CC BY 2.0 (cropped)
- Dating archaeological sites by archaeomagnetism: “Remains of lime-kiln - geograph.org.uk - 1622205” Lairich Rig / CC BY-SA 2.0 (cropped)
- Variations in paleoenvironments: “Sediment in Lake Erie” NASA Goddard Space Flight Center from Greenbelt, MD, USA / Public domain (cropped)
- Exploring earthquakes and volcanic activity through groundwater: “Dead trees at Mammoth Hot Springs” Brocken Inaglory / CC BY-SA 3.0 (cropped)
- Variations in the geomagnetic field: “Geomagnetic field and magnet analogy” Quatus / CC BY-SA 4.0 (cropped)
- Related lab (Geochemistry Lab): “archaeological artifacts found in Biała” Silar / CC BY-SA 4.0 (cropped)
- Related lab (Geochemistry Lab): “Mantle Xenolith - geograph.org.uk - 3004602” Robert Stalham / CC BY-SA 2.0 (cropped)
- Related lab (Physical Oceanography Lab): “Pacific-garbage-patch-map 2010 noaamdp” NOAA / Public domain (cropped)
- Related lab (Physical Oceanography Lab): “Sediment in the Bohai Sea, Yellow Sea, and East China Sea (MODIS )” MODIS Land Rapid Response Team, NASA GSFC / Public domain (cropped)
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