1. Cosmic-ray muon radiography of volcanoes with emulsion cloud chambers Hiroyuki Tanaka ERI University of Tokyo The 3rd International Workshop on Nuclear Emulsion Techniques － Modern techniques of nuclear emulsion and their applications －

2. Principle muon

3. Why Muon? p g electron proton muon

4. electron muon proton

7. Why ECC?

9. Why Radiography? Seismic Magnetoteluric Geodetic Gravimetric

10. Type of Volcano Vulcanian  Mt. Asama Dome  Mt. Usu

11. Mt. Asama

12. Result in Asama ECC Muon Detector

13. Mt. Usu

14. Result in Usu

15. Geodetic Model of Usu

16. Yokoyama 2002

17. Other type of volcanoes Strombolian  Satsuma Iwojima convection degassing Gas of 16000 t/day

18. Satsuma Iwojima (future observation) ECC

19. Future Prospects ３ d tomography real time monitoring  faster scanning system ECC

20. Summary Portable Power free Simple High resolution Acknowledgements: K. Niwa, T. Nakano, S. Takahashi, J. Yoshida, Nagoya University University of Tokyo Hokkaido University