Development of Algorithms for Earthquake Early Warning and Their Practical Applications

Earthquake Early Warning System has attracted research attention recently as a method to mitigate seismic hazard. It is a system to estimate earthquake properties in real-time and take an action before the strong shaking arrives at a site.

• Analytical results of the latest earthquakes in Japan (in Japanese)
• Earthquake Early Warning in Japan
• Slides and Abstracts of the 2nd EEW workshop

      [References]

• Wu, S, M. Yamada,, K. Tamaribuchi, and J. Beck (2015). Multi-events Earthquake Early Warning algorithm using a Bayesian approach. Geophysical Journal International, Vol.200-2, pp.789-806, doi: 10.1093/gji/ggu437, 2015.2. journal pdf
• Liu, A. and M. Yamada (2014). Bayesian Approach for Identification of Multiple Events in an Early Warning System. Bulletin of the Seismological Society of America, Vol.104-3, pp.1111-1121, 2014.6. journal pdf

Earthquake Damage Survey and Strong Motion Estimates

• Reports of damage survey for recent earthquakes

      [References]

• Yamada, M., T. Hayashida, J. Mori and W. Mooney (2016). Building damage survey and microtremor measurements for the source region of the 2015 Gorkha, Nepal, earthquake. Earth, Planets and Space, Vol. 68, doi: 10.1186/s40623-016-0483-4, 2016.7. journal pdf
• Yamada, M., M. Yamada, Y. Fukuda, C. Smyth, Y. Fujino, and K. Hada (2012). Estimation of Strong Motion during the 2011 Northern Nagano Earthquake and an Associated Building Damage Survey. 15th World Conference on Earthquake Engineering, No.117. pdf

Landslide Seismology

Recently, seismometers are used to monitor various natural disastors. In this study, we use sesmic signal to study landslides. We try to achieve landslide forecast, real-time monitoring, and understanding of mechanisms.

• Analysis of the seismic recordings of debris flow in Nagiso, Nagano prefecture 2014
• Analysis of the seismic recordings of landslide near Seattle 2014
• Analysis of the 2011 Nara landslides

      [References]

• Yamada, M., A. Mangeney, Y. Matsushi and L. Moretti (2016). Estimation of dynamic friction of the Akatani landslide from seismic waveform inversion and numerical simulation. Geophysical Journal International, Vol. 206, pp.1479-1486, doi: 10.1093/gji/ggw216, 2016.6. journal pdf
• Yamada, M., H. Kumagai, Y. Matsushi, and T. Matsuzawa (2013). Dynamic Landslide Processes Revealed by Broadband Seismic Records, Geophysical Research Letters, doi:10.1002/grl.50437, 2013.6. journal pdf