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Nakagawa Lab (Development of Earthquake and Volcano Observation Systems)
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The lab builds the systems behind earthquake and volcano observation, from measuring the ground's tremors to disseminating the information.
AboutAbout the lab
Earthquake observation, built as one connected system.
The Nakagawa Lab researches the development of systems for observing earthquakes and volcanoes.
In Japan, various organizations have installed seismometers across the country and observe ground motion around the clock, and the data are sent in real time to universities, the Japan Meteorological Agency, and others.
The lab develops everything from observation through data collection, data exchange between organizations, automatic processing, analysis, and information dissemination as one connected system.
The lab is located at the Earthquake Research Institute and conducts its research in collaboration with researchers across the country.
Key terms
- Hypocenter
- The place underground where the rupture of rock that causes an earthquake begins
- P wave
- The fast-traveling wave of shaking that arrives first during an earthquake. The wave of larger shaking that arrives afterward is the S wave
- Noise
- Shaking in observation data that is caused by something other than earthquakes, arising from sources such as Earth tides and human activity
ResearchResearch themes
The lab studies a single system that covers everything from detecting ground motion with seismometers to turning observation data into usable information and delivering it. It deals with the whole chain: observation, data collection and exchange, automatic processing, analysis, and information dissemination.
*Illustrative imageTotal Systems for Earthquake and Volcano Observation
The lab treats everything from observing ground motion through data collection, data exchange with other institutions, automatic processing, analysis by researchers and engineers, and dissemination of the processed results as a single system, and develops it in collaboration with researchers nationwide.
*Illustrative imageAutomatic Processing of Earthquake Data
Most observation data is noise, and earthquakes must be found within it, the arrival times of P waves and S waves read, and the hypocenter estimated. Computers now perform these tasks automatically, but many challenges remain, such as false detections.
MembersFaculty
- Associate ProfessorShigeki NakagawaPublications ↗
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: “Seismogram on historical seismometer at Institute of Geophysis of the Czech Academy of Science (15)” Petr Brož (Czech Academy of Science) / CC BY-SA 4.0 (cropped)
- Total Systems for Earthquake and Volcano Observation: “Seismometer-iceland” Heidi Soosalu / CC BY-SA 3.0 (cropped)
- Automatic Processing of Earthquake Data: “Seismogram at Weston Observatory” Z22 / CC BY-SA 3.0 (cropped)
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