Results 41 to 50 of about 54,423 (197)

Fast magnetosonic wave excitation by an array of wires with time-modulated currents [PDF]

Annales Geophysicae, 2010
The excitation of Fast Magnetosonic (FMS) waves by a cylindrical array of parallel tethers carrying time-modulated current is discussed. The tethers would fly vertical in the equatorial plane, which is perpendicular to the geomagnetic field when its ...
G. Sanchez-Arriaga, J. R. Sanmartin
doaj   +1 more source

Muons tomography applied to geosciences and volcanology

, 2012
Imaging the inner part of large geological targets is an important issue in geosciences with various applications. Dif- ferent approaches already exist (e.g.
Acquafredda, Alvarez, Arrabito, Baringer, Boudon, Bugaev, D. Gibert, F. Giacoppo, F. Nicollin, Gaisser, Gibert, J. Marteau, Komorowski, Lesparre, Marteau, N. Lesparre, Nagamine, Nagamine, Nagamine, Nakamura, Nicollin, P. Noli, Pla-Dalmau, Tanaka, Tanaka, Tanaka, Zichichi   +26 more
core   +3 more sources

Palaeoenvironmental changes recorded at the Velika Vrbica loess‐palaeosol sequence, Wallachian Basin, during MIS 3–MIS 1

Boreas, EarlyView.
This study presents a detailed investigation of the Velika Vrbica loess‐palaeosol sequence, situated in the Wallachian Basin of northeastern Serbia, with the aim to reconstruct palaeoenvironmental changes spanning Marine Isotope Stages (MIS) 3 to 1. Using optically stimulated luminescence (OSL) dating, low field magnetic susceptibility (χlf), and mass ...
Zoran M. Perić, Cathal S. Ryan, Warren Thompson, Milica G. Radaković, Petar Krsmanović, Helena Alexanderson, Slobodan B. Marković   +6 more
wiley   +1 more source

Wavelet analysis of the seismograms for tsunami warning [PDF]

Nonlinear Processes in Geophysics, 2010
The complexity in the tsunami phenomenon makes the available warning systems not much effective in the practical situations. The problem arises due to the time lapsed in the data transfer, processing and modeling.
A. Chamoli, V. Swaroopa Rani, K. Srivastava, D. Srinagesh, V. P. Dimri   +4 more
doaj   +1 more source

A North Greenland‐wide in situ cosmogenic 14C ice sheet chronology since the Lateglacial

Boreas, EarlyView.
Knowledge of the glacial history of the North Greenland Ice Sheet is crucial due to its high sensitivity to climate change. However, because the ice sheet in this region is predominantly cold‐based, resulting in low erosion rates, using 10Be exposure dating to establish reliable ice sheet chronologies has proven very challenging due to nuclide ...
Anne Sofie Søndergaard, Astrid Rosenberg, Mads Faurschou Knudsen, Kristina Hippe, Marcus  Christl, Negar Haghipour, Olivia Steinemann, Kurt H. Kjær, Nicolaj Krog Larsen   +8 more
wiley   +1 more source

A quantitative model for cyclotron wave-particle interactions at the plasmapause [PDF]

Annales Geophysicae, 1998
The formation of a zone of energetic electron precipitation by the plasmapause, a region of enhanced plasma density, following energetic particle injection during a magnetic storm, is analyzed.
D. L. Pasmanik, V. Y. Trakhtengerts, A. G. Demekhov, A. A. Lyubchich, E. E. Titova, T. Yahnina, M. J. Rycroft, J. Manninen, T. Turunen   +8 more
doaj   +1 more source

On the astronomical origin of the Hallstatt oscillation found in radiocarbon and climate records throughout the Holocene

, 2016
An oscillation with a period of about 2100-2500 years, the Hallstatt cycle, is found in cosmogenic radioisotopes (C-14 and Be-10) and in paleoclimate records throughout the Holocene. Herein we demonstrate the astronomical origin of this cycle.
Bianchini, Antonio, Milani, Franco, Ortolani, Sergio, Scafetta, Nicola   +3 more
core   +1 more source

Detection of 6 November 1997 ground level event by Milagrito [PDF]

, 2000
Solar Energetic Particles (SEPs) with energies exceeding 10 GeV associated with the 6 November 1997 solar flare/CME (coronal mass ejection) have been detected with Milagrito, a prototype of the Milagro Gamma Ray Observatory. While SEP acceleration beyond
Atkins, R, Benbow, W, Berley, D, Chen, M L, Coyne, D G, Dingus, B L, Dorfan, D E, Ellsworth, R W, Evans, D, Falcone, A, Fleysher, L, Fleysher, R, Gisler, G, Goodman, J A, Haines, T J, Hoffman, C M, Hugenberger, S, Kelley, L A, Leonor, I, Macri, John R, McConnell, Mark L, McCullough, J F, McEnery, J E, Miller, R S, Mincer, A I, Morales, M F, Nemethy, P, Ryan, James M., Shen, B, Shoup, A, Sinnis, G, Smith, A J, Sullivan, G W, Tumer, O T, Wang, K, Wascko, M O, Westerhoff, S, Williams, D A, Yang, T, Yodh, G B   +39 more
core   +2 more sources

Late‐Holocene evolution of a small Sub‐Arctic glacier, Gljúfurárjökull (Tröllaskagi, northern Iceland)

Boreas, EarlyView.
Gljúfurárjökull, located on the Tröllaskagi Peninsula in northern Iceland, is a small glacier approximately 3.8 km in length. This study analyses the glacier's evolution through a combination of methods including: (i) geomorphological mapping, (ii) Cosmic‐Ray Exposure (CRE) dating, (iii) lichenometry and (iv) palaeoglacier reconstruction (volume ...
Nuria Andrés, José M. Fernández‐Fernández, David Palacios, Irene Schimmelpfennig, Leopoldo G. Sancho, Skafti Brynjólfsson, Þorsteinn Sæmundsson, Wesley R. Farnsworth, Luis M. Tanarro, Mariano Brito, Javier Santos‐González, Rosa B. González‐Gutiérrez, ASTER Team, Georges Aumaître, Karim Keddadouche   +14 more
wiley   +1 more source

Low-frequency ionospheric sounding with Narrow Bipolar Event lightning radio emissions: energy-reflectivity spectrum [PDF]

Annales Geophysicae, 2008
We analyze data on radio-reflection from the D-region of the lower ionosphere, retrieving the energy-reflection coefficient in the frequency range ~5–95 kHz.
A. R. Jacobson, R. Holzworth, X.-M. Shao
doaj   +1 more source