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Analysis of pressure waves observed in Sakurajima eruption movies


Four eruption movies of Sakurajima volcano taken in the 1980s are analyzed. Pressure waves associated with these eruptions are identified by changes in luminance using a new image processing method. Results of the processing determined the apparent speeds of these waves at approximately 342–574 m/s. Further, spatial characteristics of the pressure waves are quantitatively investigated to estimate the source conditions of volcanic explosions.


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Correspondence to Akihiko Yokoo.

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Yokoo, A., Ishihara, K. Analysis of pressure waves observed in Sakurajima eruption movies. Earth Planet Sp 59, 177–181 (2007).

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Key words

  • Sakurajima volcano
  • image processing
  • visualized pressure waves