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  • Article
  • Open Access

Analysis of pressure waves observed in Sakurajima eruption movies

Earth, Planets and Space200759:BF03352691

  • Received: 24 June 2006
  • Accepted: 16 November 2006
  • Published:


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.

Key words

  • Sakurajima volcano
  • image processing
  • visualized pressure waves