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Tsuruoka Lab (Research Center for Monitoring the Japanese Archipelago)
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The lab analyzes seismic waveforms in real time and applies earthquake information to disaster prevention.
AboutAbout the lab
Using earthquake information for earthquake disaster prevention
The Tsuruoka Lab studies earthquake information from its creation to its use, aiming to make that information useful for earthquake disaster prevention.
In urban earthquake disaster prevention, it is important to determine and communicate as quickly as possible the location, magnitude, and focal mechanism of damaging earthquakes.
To this end, the lab develops a system that analyzes seismic waveform data arriving in real time from seismometers across Japan, as well as a variety of earthquake information systems.
Information released at an earlier stage is less accurate. The lab studies how to reduce this uncertainty by combining Earthquake Early Warning with information on observed shaking.
Key terms
- Earthquake Early Warning
- Information from the Japan Meteorological Agency that quickly estimates an earthquake's hypocenter and magnitude and gives notice before strong shaking arrives
- Seismic waveform data
- Data recorded by seismometers showing how ground motion changes over time
- GRiD MT
- An analysis system that determines the occurrence, magnitude, and focal mechanism of an earthquake in real time without waiting for hypocenter information
ResearchResearch themes
The lab develops systems that analyze seismic waveform data distributed in real time to immediately determine the location, magnitude, and focal mechanism of earthquakes, as well as systems for delivering and using earthquake information.
*Illustrative imageSystems for Putting Earthquake Early Warning to Use
The lab develops web-based software for understanding how Earthquake Early Warning works and what its technical limitations are, and continues distribution experiments to deliver and use the warnings within the University of Tokyo. It also develops a system that visualizes Hi-net seismic waveform data.
*Illustrative imageReal-Time Earthquake Analysis
The lab develops GRiD MT, an earthquake analysis system that determines the occurrence, focal mechanism, and magnitude of earthquakes in real time without relying on hypocenter bulletins, and publishes the results by web and email. It also develops a system, aimed mainly at earthquakes around the world, that uses very-long-period waves to evaluate great earthquakes and tsunami potential.
MembersFaculty
- Associate ProfessorHiroshi TsuruokaPublications ↗
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: “Harmonic-tremor” USGS / Public domain (cropped)
- Systems for Putting Earthquake Early Warning to Use: “How the Earthquake Early Warning system works” 提供元 : 気象庁 / CC BY 4.0 (cropped)
- Real-Time Earthquake Analysis: “Seismometer-iceland” Heidi Soosalu / CC BY-SA 3.0 (cropped)
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