The Indian Ocean Geoid Low (IOGL) appears as a prominent feature if the geoid is, as usual, shown with respect to the Earth's reference shape. However, if it is shown relative to hydrostatic equilibrium, i.e. including excess flattening, it appears as merely a regional low on a north-...
The Indian Ocean geoid low (IOGL) is one of the lowest geoid anomalies on Earth. Several theories have been proposed to explain this geoid low, including past subduction (Nerlich et al., 2016; Rao and Kumar, 2014), subduction coupled with low velocity anomalies in the upper mantle (Spasoj...
The fastest differential travel times occur along a line passing close to the center of the large Indian Ocean geoidal low. There is a clear increase in travel time with distance from the center of the geoid low, suggesting that the source of the geoid anomaly may also be largely responsible...
Indian Ocean geoid lowOne of the most pronounced geoid lows on Earth lies in the Indian Ocean just south of the Indian peninsula. Several theories have been proposed to explain this geoid low, most of which invoke past subduction. Some recent studies have also argued that high‐velocity ...
Ninety-four passes of GEOS-3 short pulse radar altimetry data taken in July-August 1975 over the eastern Indian Ocean (by the DoD telemetry station at Perth, Australia) have been analyzed to arrive at a preliminary ocean geoid. The self consistency of the data at track intersections has a ...
Kahle, H. GLamont-Doherty Geological Observatory Palisades NYChapman, MTalwani, MKahle, H.G., Chapman, M., Talwani, M., 1978. Detailed 1 A 1 gravimetric Indian Ocean Geoid and comparison with Geos-3 radar altimeter geoid profiles. Geophysical Journal of the Royal Astronomical Society 55 (...
multiple wavelength geoidaltimeterBay of BengalThe northern Indian Ocean consists of older Bay of Bengal (BOB) oceanic lithosphere with numerous intra-plate loads; whereas, contrasting elements like active Mid-Ocean ridge divergence and slow spreading ridges are present in the relatively younger (<60 ...
The spectral analysis of the Indian Ocean geoid low (IOGL) suggests depths of 1300, 700 and 340km for relatively large wavelength components. They are related to middle mantle and transition zones in the upper mantle, respectively where olivine changes to spinel with sharp increase in the ...
Indian Ocean Geoid LowThe Indian Ocean Geoid Low (IOGL) in the Central Indian Ocean is the largest geoid depression on the globe. Spectral decomposition of geoid anomalies reveals that a significant fraction (up to ~90%) of the IOGL is due to mass anomalies lying within the lower mantle ...
Indian Oceanpalaeo‐subducted slabsThe Indian Ocean Geoid Low (IOGL) to the south of Indian subcontinent is the world's largest geoid anomaly. In this study, we investigate the seismic anisotropy of the lowermost mantle beneath the IOGL by analyzing splitting of high-quality ScS phases corrected...