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Geomagnetic jerks: impulses of secular variation in geophysics
Language
English
Obiettivo Specifico
3.4. Geomagnetismo
Status
Published
Pages Number
539-554
Refereed
Yes
Issued date
December 2000
ISBN
88-7794-255-X
Abstract
Geomagnetic records from some observatories give a strong indication that there was a rapid, impulsive change in geomagnetic secular acceleration around 1990. Using data coming from about 80 observatories widely distributed all over the world, the structure of the secular variation for the X, Y and Z magnetic field intensities around 1990 was investigated. Evidence of a new recent jerk in 1991 was found. The 1991 geomagnetic jerk features (worldwide character of the Y second time derivative jump intensity and of the occurrence time) are compared with the character of the previous well known jerk events of 1969 and 1978.
Type
book chapter
File(s)
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Name
erice.pdf
Size
10.11 MB
Format
Adobe PDF
Checksum (MD5)
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