Open Access

Analysis of pressure waves observed in Sakurajima eruption movies

Earth, Planets and Space200759:BF03352691

DOI: 10.1186/BF03352691

Received: 24 June 2006

Accepted: 16 November 2006

Published: 23 March 2007

Abstract

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