Structural state of plagioclases within volcanic ash from Sakurajima volcano during 2013 to 2015: Preliminary investigation of monitoring volcanic activity through mineral science

Abstract

Structural state of plagioclase within volcanic ash erupted from Sakurajima volcano was preliminary investigated for monitoring the volcanic activity. Samples were collected for about 2 years and 2 months from May 2013 at the Higashi-Sakurajima junior high school located about 4 km southwest of Showa crater of Sakurajima volcano. Powder XRD data for the plagioclase suggests gradual change in degree of order in the crystal structure during this period.