Rapid variations of Earth's core magnetic field
Evidence of fast variations in the Earth's core field are seen both in magnetic observatory
and satellite records. We present here how they have been identified at the Earth's surface …
and satellite records. We present here how they have been identified at the Earth's surface …
[图书][B] The Earth's Magnetic Field
R Lanza, A Meloni - 2006 - Springer
field time variations. In fact the Earth's magnetic field not only shows a peculiar spatial
structure, mainly determined by 'a'and 'b'contributions, but is also subject to continuous time …
structure, mainly determined by 'a'and 'b'contributions, but is also subject to continuous time …
[HTML][HTML] Jerks abound: An analysis of geomagnetic observatory data from 1957 to 2008
We present a two-step method for the removal of external field signals and the identification
of geomagnetic jerks in magnetic observatory monthly mean data, providing quantitative …
of geomagnetic jerks in magnetic observatory monthly mean data, providing quantitative …
Measurements and uncertainties of the occurrence time of the 1969, 1978, 1991, and 1999 geomagnetic jerks
KJ Pinheiro, A Jackson… - Geochemistry, Geophysics …, 2011 - Wiley Online Library
Geomagnetic jerks are rapid time variations of the magnetic field at the Earth's surface that
are thought to be of primarily internal origin. Jerks are relevant for studies of the Earth …
are thought to be of primarily internal origin. Jerks are relevant for studies of the Earth …
Free core nutation and geomagnetic jerks
Z Malkin - Journal of Geodynamics, 2013 - Elsevier
Variations in free core nutation (FCN) are associated with different processes in the Earth's
fluid core and core–mantle coupling. The same processes are generally caused the …
fluid core and core–mantle coupling. The same processes are generally caused the …
Core surface flow changes associated with the 2017 Pacific geomagnetic jerk
A geomagnetic jerk was seen in Swarm satellite data in 2017 over the Pacific region. We
invert time series of spatial gradient secular variation data between 2014 and 2020, reduced …
invert time series of spatial gradient secular variation data between 2014 and 2020, reduced …
Lower mantle conductivity anomalies estimated from geomagnetic jerks
The occurrence epochs and duration periods of the 1969, 1978, and 1991 geomagnetic
jerks are estimated for 65 geomagnetic observatories by applying a statistical time series …
jerks are estimated for 65 geomagnetic observatories by applying a statistical time series …
Can a 1-D mantle electrical conductivity model generate magnetic jerk differential time delays?
K Pinheiro, A Jackson - Geophysical Journal International, 2008 - academic.oup.com
Worldwide jerks occurring in 1969, 1978 and 1991 are not simultaneous at the earth's
surface, showing differential delays of about 2 yr. One way to explain this intriguing temporal …
surface, showing differential delays of about 2 yr. One way to explain this intriguing temporal …
Multi-decadal ingredients of the secular variation of the geomagnetic field. Insights from long time series of observatory data
C Demetrescu, V Dobrica - Physics of the Earth and Planetary Interiors, 2014 - Elsevier
The temporal evolution of the geomagnetic field is shown, on data from 24 observatories
with 100–150 years long time series of annual means, to be composed of several …
with 100–150 years long time series of annual means, to be composed of several …
Geomagnetic jerk features produced using synthetic core flow models
KJ Pinheiro, H Amit, F Terra-Nova - Physics of the Earth and Planetary …, 2019 - Elsevier
Geomagnetic jerks are the shortest temporal variations of the magnetic field generated in the
Earth's core. The physical mechanism producing such abrupt changes as well as their spatio …
Earth's core. The physical mechanism producing such abrupt changes as well as their spatio …