Results 21 to 30 of about 6,822 (218)

Modelling and Interpretation of Global Lithospheric Magnetic Anomalies

open access: yes, 2003
After a gap of nearly two decades since the Magsat mission in 1980, the dedicated low-orbit potential field mission CHAMP is now in the third of its seven year mission. Already, the new magnetic total intensity and vector data have yielded maps of the global crustal field of unprecedented accuracy and resolution. Here, we assess the value of these maps
  +7 more sources

Teleseismic P‐Wave Attenuation Beneath the Southeastern United States

open access: yesGeochemistry, Geophysics, Geosystems, 2021
Seismic attenuation is an important parameter for characterizing subsurface morphology and thermal structure. In this study, we use P‐wave amplitude spectra from 588 teleseismic events recorded by 477 broadband seismic stations in the southeastern United
Ashutosh Shrivastava   +2 more
doaj   +1 more source

Mapping the Thermal Structure of Southern Africa From Curie Depth Estimates Based on Wavelet Analysis of Magnetic Data With Uncertainties

open access: yesGeochemistry, Geophysics, Geosystems, 2021
Surface heat flow provides essential information on the thermal state and thickness of the lithosphere. Southern Africa is a mosaic of the best‐preserved and exposed crustal blocks, assembled in the early late Archean and then modified by a series of ...
M. Sobh   +3 more
doaj   +1 more source

A Quick-Look Software for In Situ Magnetic Field Modeling from Onboard Unmanned Aircraft Vehicles (UAVs) Measurements

open access: yesRemote Sensing, 2023
UAVs represent a tremendous opportunity to perform geophysical and repeated experiments, particularly in volcanic contexts. Their ability to be deployed rapidly and fly at various altitudes and the fact that they are easy to operate despite complex field
Erwan Thebault, Lydie-Sarah Gailler
doaj   +1 more source

The age and origin of the central Scotia Sea [PDF]

open access: yes, 2010
Opening of the Drake Passage gateway between the Pacific and Atlantic oceans has been linked in various ways to Cenozoic climate changes. From the oceanic floor of Drake Passage, the largest of the remaining uncertainties in understanding this opening is
Eagles, Graeme
core   +1 more source

Thermal structures of the Pacific lithosphere from magnetic anomaly inversion

open access: yesEarth and Planetary Physics, 2018
Of the world's oceans, the Pacific has the most abundant distribution of seamount trails, oceanic plateaus and hot spots, and has the longest fracture zones. However, little is known of their thermal structures due to difficulties of heat flow measurement and interpretation, and in inferring thermal anomalies from low-resolution seismic velocities ...
Chun-Feng Li, Jian Wang
openaire   +2 more sources

Geodynamic Aspects of Magnetic Data Analysis and Tectonic–Paleomagnetic Mapping in the Easternmost Mediterranean: A Review

open access: yesApplied Sciences, 2023
The Easternmost Mediterranean is a transition region from the ocean to the continent where the spreading and collision zones of the lithospheric plates join.
Lev V. Eppelbaum   +2 more
doaj   +1 more source

Improved magnetic anomalies of the Antarctic lithosphere from satellite and near-surface data [PDF]

open access: yesGeophysical Journal International, 2007
SUMMARY The Antarctic magnetic anomaly map compiled marine and airborne surveys collected south of 60 ◦ S through 1999 and used Magsat data to help fill in the regional gaps between the surveys. Orsted and CHAMP satellite magnetic observations with greatly improved measurement accuracies and temporal and spatial coverage of the Antarctic, have now ...
Kim, Hyung Rae   +5 more
openaire   +3 more sources

Lithospheric controls on melt production during continental breakup at slow rates of extension: Application to the North Atlantic

open access: yes, 2009
Rifted margins form from extension and breakup of the continentallithosphere. If this extension is coeval with a region of hotter lithosphere,then it is generally assumed that a volcanic margin would follow.
Armitage, J.J.   +3 more
core   +1 more source

Compatibility of high-altitude aeromagnetic and satellite-altitude magnetic anomalies over Canada [PDF]

open access: yes, 2002
Results from equivalent-source distributions derived jointly from high-altitude (average 4 km) aeromagnetic and Magsat-derived (average 400 km) magnetic anomalies over Canada indicate that long-wavelength components (500–2500 km) in these fields are ...
Pilkington, M.   +4 more
core   +1 more source

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