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Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/4078

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Title: Could the Mw = 9.3 Sumatra Earthquake Trigger a Geomagnetic Jerk?
Authors: Florindo, F.*
De Michelis, P.*
Piersanti, A.*
Boschi, E.*
Keywords: Sumatra Earthquake
Geomagnetic Jerk
Issue Date: 22-Mar-2005
Publisher: AGU
Title of journal: Eos Trans. AGU
Series/Report no.: 12 / 86 (2005)
Abstract: The magnetic field observed at the Earth’s surface is not a stationary feature. It is characterized by time variations ranging from milliseconds (micropulsations) to millions of years (the time interval between field reversals). Time variations with periods of a year or longer are related to Earth’s outer core sources, whereas for shorter timescales an external origin is invoked (i.e., solar activity). One of the most interesting time variations of the geomagnetic field is represented by the “geomagnetic jerk.” It is idealized as a rapid change in the slope of the secular variation, defined as the first derivative of the geomagnetic field. This means that the secular variation roughly appears as a series of straightline segments separated by geomagnetic jerks.
URI: http://hdl.handle.net/2122/4078
Appears in Collections:Papers Published / Papers in press
04.05.02. Geomagnetic field variations and reversals
04.07.02. Geodynamics

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