Results 21 to 30 of about 88,657 (281)

First evidence of sinter and travertine in Cameroon: fault reactivation and geothermal implications

Comptes Rendus. Géoscience, 2023
The Laopanga hot spring deposits along the “Cameroon Volcanic Line” (CVL) are distinctive in being both siliceous sinter and travertine, made up of immature amorphous silica and mainly calcite, and associated with detrital deposits such as claystone ...
Tchouatcha, Milan Stafford, Kouske, Arnaud Patrice, Tamfuh, Primus Azinwi, Préat, Alain, Toyama, René, Feumba, Roger, Tiokeng Ngounfack, Vannelle, Madjingain, Vivant, Konglim, Yaya Berinyuy, Tchameni, Rigobert   +9 more
doaj   +1 more source

Parametric dependencies of spontaneous hot flow anomalies [PDF]

Journal of Geophysical Research: Space Physics, 2014
AbstractParametric dependencies of spontaneous hot flow anomalies at the quasi‐parallel bow shock are investigated using global hybrid (kinetic ions and fluid electron) simulations with a variety of solar wind Mach numbers and directions of the interplanetary magnetic field (IMF). Simulations with solar wind Alfvénic Mach number of 3 and small IMF cone
N. Omidi, H. Zhang, C. Chu, D. Sibeck, D. Turner   +4 more
openaire   +1 more source

Wave activity inside hot flow anomaly cavities [PDF]

Journal of Geophysical Research: Space Physics, 2008
Low‐frequency wave properties inside two hot flow anomalies (HFAs) at different stages of evolution are, for the first time, studied applying the k‐filtering technique on multipoint measurements from the Cluster satellites. The observed wave activity in an HFA cavity in an early stage of its evolution was interpreted as the combination of inherent ...
A. Tjulin, E. A. Lucek, I. Dandouras
openaire   +1 more source

Ion Kinetics in a Hot Flow Anomaly: MMS Observations [PDF]

Geophysical Research Letters, 2018
AbstractHot Flow Anomalies (HFAs) are transients observed at planetary bow shocks, formed by the shock interaction with a convected interplanetary current sheet. The primary interpretation relies on reflected ions channeled upstream along the current sheet. The short duration of HFAs has made direct observations of this process difficult.
Steven J Schwartz, Levon Avanov, Drew Turner, Hui Zhang, Imogen Gingell, Jonathan P Eastwood, Daniel J Gershman, Andreas Johlander, Christopher T Russell, James L Burch, John C Dorelli, Stefan Eriksson, Robert E Ergun, Stephen A Fuselier, Barbara L Giles, Katherine A Goodrich, Yuri V Khotyaintsev, Benoit Lavraud, Per‐Arne Lindqvist, Mitsuo Oka, Tai‐Duc Phan, Robert J Strangeway, Karlheinz J Trattner, Roy B Torbert, Andris Vaivads, Hanying Wei, Victoria Wilder   +26 more
openaire   +4 more sources

Evolution of Ohmically Heated Hot Jupiters [PDF]

, 2011
We present calculations of thermal evolution of Hot Jupiters with various masses and effective temperatures under Ohmic dissipation. The resulting evolutionary sequences show a clear tendency towards inflated radii for effective temperatures that give ...
Batygin, Konstantin, Bodenheimer, Peter H., Stevenson, David J.   +2 more
core   +2 more sources

Characterising the relationship between weather extremes in Europe and synoptic circulation features [PDF]

Natural Hazards and Earth System Sciences, 2014
Extreme weather events in Europe are closely linked to anomalies of the atmospheric circulation and in particular to circulation features like cyclones and atmospheric blocking. In this study, this linkage is systematically characterised with the help of
S. Pfahl
doaj   +1 more source

Asthenospheric flow through the Izanagi-Pacific slab window and its influence on dynamic topography and intraplate volcanism in East Asia

Frontiers in Earth Science, 2022
The tectonics of East Asia are notoriously complex. Consisting of an intricate patchwork of microplates and accreted terranes, even the Cenozoic tectonic history of the region remains controversial, and many differing reconstructions have been proposed ...
Hamish Brown, Lorenzo Colli, Hans-Peter Bunge   +2 more
doaj   +1 more source

A hot flow anomaly at Mars

Geophysical Research Letters, 2015
AbstractOne of the most important modes of planet/solar wind interaction are “foreshock transients” such as hot flow anomalies (HFAs). Here we present early observations by the NASA Mars Atmosphere and Volatile EvolutioN spacecraft, confirming their presence at Mars and for the first time at an unmagnetized planet revealing the underlying ion ...
Glyn Collinson, Jasper Halekas, Joseph Grebowsky, Jack Connerney, David Mitchell, Jared Espley, Gina DiBraccio, Christian Mazelle, Jean‐André Sauvaud, Andrei Fedorov, Bruce Jakosky   +10 more
openaire   +1 more source

Hot flow anomaly remnant in the far geotail? [PDF]

Journal of Atmospheric and Solar-Terrestrial Physics, 2015
accepted on January 23, 2015 to Journal of Atmospheric and Solar-Terrestrial Physics.
Facskó, Gábor, Opitz, Andrea, Lavraud, Benoit, Luhmann, Janet G., Russell, Christopher T., Sauvaud, Jean-Andre, Fedorov, Andrei, Kis, Árpád, Wesztergom, Viktor   +8 more
openaire   +3 more sources

The depth geodynamic state and its correlation with the surface geological and geophysical parameters along the sublatitudinal profile of Eurasia

Геодинамика и тектонофизика, 2019
A cross‐sections of longitudinal (P) and transverse (S) wave anomalies (attribute δ(VP/VS)) is constructed along the sublatitudinal profile from the Atlantic Ocean to the Pacific Ocean across the regions of the latest Eurasian volcanism. It is correlated
S. Yu. Sokolov
doaj   +1 more source