An attempt to detect the volcanomagnetic variation by a Kalman filter algorithm

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Bibliographic Information

Other Title
  • カルマンフィルターによる火山性磁場変動検出の試み

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Abstract

A new procedure to extract the long-period volcanomagnetic variation was developed. A time series model including a trend component, a periodic component, an external magnetic field response, and a white noise was considered and separated to each component with a Kalman filter algorithm. The method was applied to the geomagnetic total intensity data observed at Kuchierabujima volcano and worked well against the data with a long-term defect by using the data of a standard geomagnetic observatory as the reference data for the estimation of the geomagnetic field variation of external origin. The extracted trend component of each observation site revealed that thermal demagnetization is going on at depth around the Shindake active crater.

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Details 詳細情報について

  • CRID
    1050282677042043264
  • NII Book ID
    AN00027784
  • ISSN
    0386412X
  • HANDLE
    2433/129108
  • Text Lang
    ja
  • Article Type
    departmental bulletin paper
  • Data Source
    • IRDB

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