Results 21 to 30 of about 54,423 (197)

The structure and dynamics of a large-scale plasmoid generated by fast reconnection in the geomagnetic tail [PDF]

open access: yesAnnales Geophysicae, 2011
As a sequence of Ugai (2010b), the present paper studies in detail the structure and dynamics of large-scale (principal) plasmoid, generated by the fast reconnection evolution in a sheared current sheet with no initial northward field component. The
M. Ugai
doaj   +1 more source

Data quality control and tools in passive seismic experiments exemplified on the Czech broadband seismic pool MOBNET in the AlpArray collaborative project [PDF]

open access: yesGeoscientific Instrumentation, Methods and Data Systems, 2017
This paper focuses on major issues related to the data reliability and network performance of 20 broadband (BB) stations of the Czech (CZ) MOBNET (MOBile NETwork) seismic pool within the AlpArray seismic experiments.
L. Vecsey   +5 more
doaj   +1 more source

Modelling solar cycle length based on Poincaré maps for Lorenz-type equations [PDF]

open access: yesAnnales Geophysicae, 2010
Two systems of Lorenz-type equations modelling solar magnetic activity are studied: Firstly a low order dynamic system in which the toroidal and poloidal fields are represented by x- and y-coordinates respectively, and the hydrodynamical information ...
H. Lundstedt, T. Persson
doaj   +1 more source

Auroral ASCAPLOT at Syowa Station in 1959 and 1960

open access: yesAntarctic Record, 1962
Auroral ASCAPLOTs at Syowa Station in 1959 (from Feb. 11 to Oct. 26) and in 1960 (from Feb. 12 to Oct. 6) were presented.
Junji NAKAMURA   +2 more
doaj   +1 more source

Analysis and reduction of the geomagnetic gradient influence on aeromagnetic compensation in a towed bird [PDF]

open access: yesGeoscientific Instrumentation, Methods and Data Systems, 2021
Aeromagnetic exploration is an important method of geophysical exploration. We study the compensation method of the towed bird system and establish the towed bird interference model.
Z. Zhou   +9 more
doaj   +1 more source

Localized fast flow disturbance observed in the plasma sheet and in the ionosphere [PDF]

open access: yesAnnales Geophysicae, 2005
An isolated plasma sheet flow burst took place at 22:02 UT, 1 September 2002, when the Cluster footpoint was located within the area covered by the Magnetometers-Ionospheric Radars-All-sky Cameras Large Experiment (MIRACLE).
R. Nakamura   +10 more
doaj   +1 more source

Longitudinal, seasonal and solar cycle variation in lunar tide influence on the equatorial electrojet [PDF]

open access: yesAnnales Geophysicae, 2017
It has been well documented that the lunar tidal waves can modulate the ionospheric electrodynamics and create a visible influence on the equatorial electrojet (EEJ). The lunar tide influence gets intensified around noon, primarily during new and full
E. Yizengaw, B. A. Carter
doaj   +1 more source

Determining Offshore Ocean Significant Wave Height (SWH) Using Continuous Land-Recorded Seismic Data: An Example from the Northeast Atlantic

open access: yesJournal of Marine Science and Engineering
Long-term continuous and reliable real-time ocean wave height data are important for climatologists, offshore industries, leisure craft users, and marine forecasters.
Samaneh Baranbooei   +3 more
doaj   +1 more source

Model results for the ionospheric lower transition height over mid-latitude [PDF]

open access: yesAnnales Geophysicae, 2004
Theoretical calculations of the ionospheric lower transition height (LTH), a level of equal O+ and molecular ion densities, were performed and compared with empirical models by Zhang et al. (1996). This paper represents a substantial extension of
J. Lei   +4 more
doaj   +1 more source

Neutrino tomography - Learning about the Earth's interior using the propagation of neutrinos

open access: yes, 2006
Because the propagation of neutrinos is affected by the presence of Earth matter, it opens new possibilities to probe the Earth's interior. Different approaches range from techniques based upon the interaction of high energy (above TeV) neutrinos with ...
A. B. Borisov   +36 more
core   +1 more source

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