Results 181 to 190 of about 3,177 (203)
Some of the next articles are maybe not open access.
Interpretation of Long Wavelength Magnetic Anomalies
1981The Earth’s magnetic field (emf) measured at or above the Earth’s surface has two main components of internal origin: a primary (or main) field which is originated in the outer core and appears as large scale features at the Earth’s surface, and a secondary field which is due to both induced and remanent magnetization of high susceptibility ...
Paolo Gasparini +2 more
openaire +1 more source
Journal of Geophysical Research: Solid Earth, 1989
Vector magnetic anomaly maps are derived at satellite altitude from Magsat data over the Caribbean and Middle America. To minimize smoothing of the anomaly field caused by averaging the data over the whole altitude range of Magsat measurements, two maps are derived in two nonoverlapping altitude ranges: 350–420 and 420–550 km.
Jean‐Louis Counil +2 more
openaire +1 more source
Vector magnetic anomaly maps are derived at satellite altitude from Magsat data over the Caribbean and Middle America. To minimize smoothing of the anomaly field caused by averaging the data over the whole altitude range of Magsat measurements, two maps are derived in two nonoverlapping altitude ranges: 350–420 and 420–550 km.
Jean‐Louis Counil +2 more
openaire +1 more source
Magnetization of lower crustal rocks - potential sources of long wavelength anomalies
2020<p>The occurrence and nature of primary magnetic phases in ultramafic rocks is a subject of debate. Studies of ultramafic rocks originating in the deep crust commonly report secondary magnetic phases due to later metamorphism, serpentinization, or alteration as sources for long-wavelength anomalies.
Geertje ter Maat +3 more
openaire +1 more source
Long wavelength magnetic anomalies from the lithosphere: Indian shield and Himalaya
Tectonophysics, 1984Abstract A few long-range airborne magnetic profiles flown at an altitude of 7.5 km a.s.l. across the Indian shield are analysed and interpreted in terms of magnetization in the lower crust. The wavelengths of the crustal anomalies are in the range of 51–255 km and this is used to separate them from signals originating at shallow depths.
openaire +1 more source
Forward modeling of long-wavelength magnetic anomalies from the upper mantle
SEG Technical Program Expanded Abstracts 2016, 2016Long-wavelength magnetic anomalies (LWMA) are broad scale magnetic fields that are usually observed at satellite altitudes. The origin of these fields have been assumed to be solely from the crust, disregarding possible contributions from the upper mantle.
openaire +1 more source
Acquisition of long wavelength magnetic anomalies pre-dates continental drift
Physics of the Earth and Planetary Interiors, 1983Abstract Using the low altitude MAGSAT satellite data, NASA recently published a new global magnetic map of anomalies. Using this new accurate map and paleomagnetic reconstructions of Gondwanaland, we point out that long wavelength anomalies were continuous in continents that are presently separated.
openaire +1 more source
Satellite magnetic anomalies with a smooth spectral transition to long wavelengths
Physics of the Earth and Planetary Interiors, 2022Josef Sebera, Ales Bezděk, Jörg Ebbing
openaire +1 more source
Enhanced Short-Wavelength Marine Gravity Anomaly Using Depth Data
IEEE Transactions on Geoscience and Remote Sensing, 2023Ruijie Hao +2 more
exaly