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Strong Ground Motion Lab
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The lab works to understand and predict the strong shaking of large earthquakes.
AboutAbout the lab
Explaining and predicting the strong shaking of large earthquakes
The Strong Ground Motion Lab studies the prediction of the strong shaking (strong ground motion) caused by large earthquakes.
Based on earthquake source physics and seismic wave theory, the lab conducts basic research on the generation, propagation, and amplification of strong ground motion from the source to the site, and develops broadband strong ground motion prediction methods.
The lab aims to contribute to building a society resilient to disasters.
Key terms
- Strong ground motion
- Shaking during a large earthquake that is strong enough to damage buildings and other structures
- Source inversion
- A method of working backward from recorded shaking to determine where on a fault, and how, the slip occurred
- Long-period ground motion
- Slow, large-amplitude shaking produced by large earthquakes
ResearchResearch themes
Based on source physics and seismic wave theory, the lab conducts basic research on the generation and propagation of strong ground motion from the source to the site, and works on building rational broadband strong ground motion prediction methods.
*Illustrative imageGeneration of strong ground motion at the source
Through source inversion of strong-motion records to estimate rupture processes, and through broadband waveform modeling, the lab studies how strong shaking is generated in inland, plate-boundary, and intraslab earthquakes, and develops new inversion methods.
*Illustrative imageSeismic wave propagation and site effects
Through modeling of the generation and propagation of long-period ground motion, exploration of subsurface structure by microtremor observation and seismic reflection surveys, and seismic interferometry, the lab investigates how the ground affects shaking.
*Illustrative imageStrong ground motion prediction for scenario earthquakes
The lab develops broadband strong ground motion simulation methods such as the empirical and statistical Green's function methods, and studies predictions that use active fault information as well as predictions of long-period ground motion from great megathrust earthquakes.
MembersFaculty
The Strong Ground Motion Lab's members consist of faculty, administrative assistants, researchers, and master's students.As of 2026
- ProfessorKimiyuki Asano
- Associate ProfessorTomohisa Okazaki
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: “2004 Chuetsu earthquake Damaged building, Nagaoka 02” Naoki Sato / CC BY-SA 2.0 (cropped)
- Generation of strong ground motion at the source: “Nisqually Earthquake ShakeMap Oct 13 2003” United States Geological Survey / Public domain (cropped)
- Seismic wave propagation and site effects: “Furukawakokufu Basin and Hida Mountains from Mount Ibushi” Alpsdake / CC0 (cropped)
- Strong ground motion prediction for scenario earthquakes: “Fault scarp-Nara basin east edge fault zone” Gofukuji / CC BY-SA 4.0 (cropped)
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