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Title: 噴火微動を用いた火山灰放出量のモニタリング手法
Other Titles: A Method for Monitoring of Discharge Volume of Volcanic Ash by Using Volcanic Tremor
Authors: 井口, 正人  kyouindb  KAKEN_id
Author's alias: IGUCHI, Masato
Keywords: 桜島火山
Sakurajima volcano
volcanic ash
explosive eruption
continuous eruption
volcanic tremor
Issue Date: Sep-2013
Publisher: 京都大学防災研究所
Journal title: 京都大学防災研究所年報. B = Disaster Prevention Research Institute Annuals. B
Volume: 56
Issue: B
Start page: 221
End page: 225
Abstract: A method for estimation of amount of volcanic ash ejected by explosive eruption at Showa crater of Sakurajima volcano is proposed. Volcanic tremor is observed associated with continuous ejection of volcanic ash. Monthly sum of seismic energy released by volcanic tremor is correlated with monthly amount of volcanic ash ejected from the crater. Maximum power with better correlation is found in the frequency range of 2-3 Hz of the volcanic tremor. Considering monthly number of explosive eruptions which eject volcanic ash instantaneously, the monthly weight of volcanic ash can be estimated from seismic energy of volcanic tremor.
Appears in Collections:Vol.56 B

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