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Eshagh, Mehdi, ProfessorORCID iD iconorcid.org/0000-0003-0067-8631
Alternative names
Publications (10 of 75) Show all publications
Eshagh, M. & Tenzer, R. (2020). Elastic thickness of the Iranian lithosphere from gravity and seismic data. Tectonophysics, 774, Article ID 228186.
Open this publication in new window or tab >>Elastic thickness of the Iranian lithosphere from gravity and seismic data
2020 (English)In: Tectonophysics, ISSN 0040-1951, E-ISSN 1879-3266, Vol. 774, article id 228186Article in journal (Refereed) Published
Abstract [en]

We estimate the (effective) elastic thickness of the Iranian lithosphere (and adjoining tectonic plates) by using the approach that combines the Vening Meinesz-Moritz's (VMM) regional isostatic principle with the isostatic flexural model formulated based on solving a flexural differential equation for a thin elastic shell. To model the response on a load more realistically, we also consider the lithospheric density structure. The resulting expression describes a functional relation that links gravity field and mechanical properties of the lithosphere. The Young modulus and the Poisson ratio are computed from seismic velocity data in prior of estimating the lithospheric elastic thickness. The presented results reveal that the estimated elastic thickness closely resembles a regional tectonic configuration associated with the extensional tectonism along the Red Sea-Gulf Rift System, the continental collision of the Arabian and Eurasian plates, and the subduction along the Makran Subduction Zone. Seismically and volcanically active convergent tectonic margins of the Zagros and Kopeh Dagh Fold and Thrust Belts further extending along the Makran Accretionary Complex are characterised by a low lithospheric strength, with the elastic thickness typically less than ∼30 km. These small values of the elastic thickness are in a striking contrast to much larger values within most of the Central Iranian Blocks. According to our estimate, local maxima there reach ∼70 km in the Tabas micro-block. The elastic thickness of the Turan and Arabian Platforms reaches maxima of ∼100 km. These results generally support the hypothesis that tectonically active zones and orogens have a relatively low strength, resulting in a significant response of the lithosphere on various tectonic loads, compared to a significant strength of old cratonic formations. Interestingly, however, we observe a striking contrast between a low strength of the Arabian Shield compared to a high strength of the Arabian Platform. A possible explanation of this finding could be given by a different thermal regime of the Arabian lithosphere, controlled mainly by a mantle upwelling and a consequent extensional tectonism along the Red Sea-Gulf Rift System. © 2019

Keywords
Differential equations; Plates (structural components); Seismic waves; Seismology; Tectonics, Cratons; Elastic thickness; Flexure; Iranian block; Isostasy; Lithosphere, Structural geology
National Category
Geophysics
Research subject
ENGINEERING, Geodesy
Identifiers
urn:nbn:se:hv:diva-15003 (URN)10.1016/j.tecto.2019.228186 (DOI)2-s2.0-85077502280 (Scopus ID)
Available from: 2020-02-24 Created: 2020-02-24 Last updated: 2020-03-02Bibliographically approved
Gedamu, A. A., Eshagh, M. & Bedada, T. B. (2020). Moho determination from GOCE gradiometry data over Ethiopia. Journal of African Earth Sciences, 163, Article ID 103741.
Open this publication in new window or tab >>Moho determination from GOCE gradiometry data over Ethiopia
2020 (English)In: Journal of African Earth Sciences, ISSN 1464-343X, E-ISSN 1879-1956, Vol. 163, article id 103741Article in journal (Refereed) Published
Abstract [en]

The gravity field and steady-state ocean circulation explorer (GOCE) satellite mission has a good global coverage of data except across the Polar Regions. Here, the goal is to take the advantage of such a coverage over Ethiopia and use the 2nd order radial derivative of the Earth’s gravitational potential for determining a Moho model for this territory. In order to compute Moho depth, we used the Vening Meinesz-Moritz (VMM) theory of isostasy and the GOCE 2nd order radial derivatives are inverted using an integral equation in combination with effects of topographic/bathymetric, sediment and consolidated crystalline masses and considering density contrast model derived from CRUST1.0. The GOCE derived Moho depth over Ethiopia varies from 24.9 to 44.8 km. More specifically, the Moho depth ranges outside of the rift valley from 33.9 to 44.4 km and from 25.5 to 44.8 km across the western and eastern plateaus of Ethiopia respectively. In addition, inside the main Ethiopian rift system the Moho depth varies from 24.9 to 41.5 km where the minimum occur in the Afar region. We compare our Moho model with that of CRUST1.0, Meier 05, M13_Eurasia, GEMMA models and 82 local seismic stations over Ethiopia. The result showed, respectively, standard deviations of 5.3, 4.9, 8.1, 5.0 and 4.0 km with respect to these Moho models. Our Moho model is closer to the local seismic stations than other models.

Keywords
CRUST1.0; Moho; Second order radial derivatives of disturbing potential; Vening meinesz-moritz (VMM) theory
National Category
Geophysics
Identifiers
urn:nbn:se:hv:diva-15093 (URN)10.1016/j.jafrearsci.2019.103741 (DOI)000518720600005 ()
Funder
Swedish National Space Board, 187/18
Note

Funders:  Entoto Observatory and Research Centre, Ethiopian Space Science and Technology Institute

Available from: 2020-03-27 Created: 2020-03-27 Last updated: 2020-04-06Bibliographically approved
Eshagh, M. & Pitoňák, M. (2019). Elastic Thickness Determination from on-orbit GOCE Data and CRUST1.0. Pure and Applied Geophysics, 176(2), 685-696
Open this publication in new window or tab >>Elastic Thickness Determination from on-orbit GOCE Data and CRUST1.0
2019 (English)In: Pure and Applied Geophysics, ISSN 0033-4553, E-ISSN 1420-9136, Vol. 176, no 2, p. 685-696Article in journal (Refereed) Published
Abstract [en]

Elastic thickness (Te) is a parameter representing the lithospheric strength with respect to the loading. Those places, having large values of elastic thickness, flexes less. In this paper, the on-orbit measured gravitational gradients of the Gravity field and steady-state Ocean Circulation Explorer (GOCE) mission are used for determining the elastic thickness over Africa. A forward computational method is developed based on the Vening Meinesz-Moritz (VMM) and flexural theories of isostasy to find a mathematical relation between the second-order derivative of the Earth’s gravity field measured by the GOCE satellite and mechanical properties of the lithosphere. The loading of topography and bathymetry, sediments and crystalline masses are computed from CRUST1.0, in addition to estimates of laterally-variable density of the upper mantle, Young’s modulus and Poisson’s ratio. The second-order radial derivatives of the gravitational potential are synthesised from the crustal model and different a priori values of elastic thickness to find which one matches the GOCE on-orbit gradient. This method is developed in terms of spherical harmonics and performed at any point along the GOCE orbit without using any planar approximation. Our map of Te over Africa shows that the intra-continental hotspots and volcanoes, such as Ahaggar, Tibesti, Darfur, Cameroon volcanic line and Libya are connected by corridors of low Te. The high values of Te are mainly associated with the cratonic areas of Congo, Chad and the Western African basin.

Keywords
Elastic thickness, Forward modelling, GOCE gravitational gradients, Isostasy
National Category
Geophysics
Research subject
ENGINEERING, Geodesy
Identifiers
urn:nbn:se:hv:diva-13113 (URN)10.1007/s00024-018-2018-3 (DOI)000460039400010 ()2-s2.0-85062302204 (Scopus ID)
Note

First Online: 06 November 2018

Funders: Czech Science Foundation, GA18-06943S

Available from: 2018-11-12 Created: 2018-11-12 Last updated: 2020-02-04Bibliographically approved
Rathnayake, S., Tenzer, R., Eshagh, M. & Pitoňák, M. (2019). Gravity Maps of the Lithospheric Structure Beneath the Indian Ocean. Surveys in geophysics, 40(5), 1055-1093
Open this publication in new window or tab >>Gravity Maps of the Lithospheric Structure Beneath the Indian Ocean
2019 (English)In: Surveys in geophysics, ISSN 0169-3298, E-ISSN 1573-0956, Vol. 40, no 5, p. 1055-1093Article in journal (Refereed) Published
Abstract [en]

The lithospheric structure beneath the Indian Ocean is probably the most complicated, but at the same time, the least understood among world's oceans. Results of tomographic, geochemical, magnetic and other surveys provide the evidence of its complex geological history. Seismic surveys have been a primary source of information about the lithospheric structure beneath the Indian Ocean, but these experiments are mainly concentrated at locations of a high geophysical interest. Marine gravity data obtained from processing the satellite altimetry measurements, on the other hand, deliver a detailed image of the whole seafloor relief, advancing further the knowledge about its formation, tectonism and volcanism. In this study, we use gravitational, bathymetric, marine sediment and lithospheric density structure data to compile the Bouguer and mantle gravity maps. We then use both gravity maps to interpret the lithospheric structure beneath the Indian Ocean. The Bouguer gravity map reveals major tectonic and volcanic features that are spatially correlated with crustal thickness variations. The mantle gravity map exhibits mainly a thermal signature of the lithospheric mantle. Gravity lows in this gravity map mark distinctively active oceanic divergent tectonic margins along the Central, Southeast and Southwest Indian Ridges including also the Carlsberg Ridge. Gravity lows extend along the Red Sea-Gulf of Aden and East African Rift Systems, confirming a connection between mid-oceanic spreading ridges (in the Indian Ocean) and continental rift systems (in East Africa). The combined interpretation of the Bouguer and mantle gravity maps confirms a non-collisional origin of mountain ranges along continental rift systems in East Africa. The evidence of a southern extension of the East African Rift System and its link with the Southwest Indian Ridge in the mantle gravity map is absent. Similarly, the ongoing breakup of the composite Indo-Australian plate is not manifested. A missing thermal signature in the mantle gravity map at these two locations is explained by the fact that the southern Nubian-Somalian plate boundary (i.e., the Lwandle plate) and the Indo-Australian plate boundary (i.e., the Capricorn plate) are diffuse zones of convergence, characterized by low deformation and seismicity due to very slow rates of relative motions accommodated across these boundaries. The clear manifestation of the thermal signature of intraplate hot spots in the mantle gravity map is also absent. This finding agrees with the evidence from direct heat flow measurements that do not indicate the presence of a significant positive temperature anomaly compared to the oceanic lithosphere of a similar age. © 2019, Springer Nature B.V.

Keywords
Crust, Gravity, Indian Ocean, Lithosphere, Mantle
National Category
Geophysics
Research subject
ENGINEERING, Geodesy
Identifiers
urn:nbn:se:hv:diva-14468 (URN)10.1007/s10712-019-09564-6 (DOI)000484978000002 ()2-s2.0-85071022814 (Scopus ID)
Available from: 2019-10-02 Created: 2019-10-02 Last updated: 2020-02-03Bibliographically approved
Eshagh, M., Pitonak, M. & Tenzer, R. (2019). Lithospheric elastic thickness estimates in central Eurasia. Terrestrial, Atmospheric and Oceanic Science, 30(1), 73-84
Open this publication in new window or tab >>Lithospheric elastic thickness estimates in central Eurasia
2019 (English)In: Terrestrial, Atmospheric and Oceanic Science, ISSN 1017-0839, E-ISSN 2223-8964, Vol. 30, no 1, p. 73-84Article in journal (Refereed) Published
Abstract [en]

We estimate the elastic thickness of a continental lithosphere by using two approaches that combine the Vening Meinesz-Moritz (VMM) regional isostatic principle with isostatic flexure models formulated based on solving flexural differential equations for a thin elastic shell with and without considering a shell curvature. To model the response of the lithosphere on a load more realistically, we also consider lithospheric density heterogeneities. Resulting expressions describe a functional relation between gravity field quantities and mechanical properties of the lithosphere, namely Young’s modulus and Poisson’s ratio that are computed from seismic velocity models in prior of estimating the lithospheric elastic thickness. Our numerical study in central Eurasia reveals that both results have a similar spatial pattern, despite exhibiting also some large localized differences due to disregarding the shell curvature. Results show that cratonic formations of North China and Tarim Cratons, Turan Platform as well as parts of Siberian Craton are characterized by the maximum lithospheric elastic thickness. Indian Craton, on the other hand, is not clearly manifested. Minima of the elastic thickness typically correspond with locations of active continental tectonic margins, major orogens (Tibet, Himalaya and parts of Central Asian Orogenic Belt) and an extended continental crust. These findings generally support the hypothesis that tectonically active zones and orogens have a relatively small lithospheric strength, resulting in a significant respond of the lithosphere on various tectonic loads, compared to a large lithospheric strength of cratonic formations.

Keywords
Cratons, Elastic thickness, Flexure, Isostasy, Lithosphere, Orogens
National Category
Geophysics Geology
Research subject
ENGINEERING, Geodesy
Identifiers
urn:nbn:se:hv:diva-13844 (URN)10.3319/TAO.2018.09.28.02 (DOI)000461562200007 ()2-s2.0-85063267038 (Scopus ID)
Note

Funders: Czech Science Foundation, GA18-06943S 

Available from: 2019-05-24 Created: 2019-05-24 Last updated: 2020-02-04Bibliographically approved
Eshagh, M. & Berntsson, J. (2019). On quality of NKG2015 geoid model over the Nordic countries. Journal of Geodetic Science, 9(1), 97-110
Open this publication in new window or tab >>On quality of NKG2015 geoid model over the Nordic countries
2019 (English)In: Journal of Geodetic Science, ISSN 2081-9919, E-ISSN 2081-9943, Vol. 9, no 1, p. 97-110Article in journal (Refereed) Published
Abstract [en]

The NKG2015 geoid model covers the Nordic and Baltic countries and has been computed based on the least-squares modification of Stokes’ formula with additive corrections method. New and precise terrestrial, airborne and shipborne gravimetric measurements, the recent global gravity model of the gravity field and steady-state ocean circulation explorer (GOCE) and detailed digital terrain models over each territory have been used for computing this new geoid model. Some estimates for the error of this model have been roughly presented by comparing it with the global navigation satellite system(GNSS) data over each country. In this paper, our goal is to have a closer look at the relative error of this model by performing some statistical tests and finding the proper corrective surface for absorbing the systematic errors over each country. Our main assumption is realisticity of the errors of GNSS/levelling data and we will investigate its consequences in estimating the error of the geoid model. Our results show that the 4-parameter corrective surface is suitable for modelling the systematic trends of the differences between the gravimetric and GNSS geoid heights in Sweden, Denmark and Finland, but a filtered discrepancies by a confidence interval of 95% should be used for Sweden. A 7-aparameter model is suitable for the filtered discrepancies with the confidence interval of 95% in Norway. Based on the selected corrective surface and our newly developed regional iterative variance estimator, the confidence interval for the error of NKG2015 geoid model in Sweden, Denmark and Norway yielded 0-6.5 mm, 1.8-5.2 mm, 14.8-17.7 mm, respectively with a confidence level of 95%. We could not estimate the geoid error in Finland because the given error of the GNSS/levelling heights is significantly larger than the size of residuals. Based on the selected corrective surfaces and our presented local variance estimator, the average error of geoid becomes 3.6, 2.4, 8.8 and 5.8 mm with a confidence interval of 68%, respectively, over Sweden, Denmark, Norway and Finland.

Keywords
estimation; GNSS/levelling; hypothesis testing; normality; confidence interval; variance
National Category
Geophysics
Research subject
ENGINEERING, Geodesy
Identifiers
urn:nbn:se:hv:diva-14937 (URN)10.1515/jogs-2019-0010 (DOI)000505064500001 ()
Available from: 2020-02-05 Created: 2020-02-05 Last updated: 2020-03-10Bibliographically approved
Sundararajan, N., Eshagh, M., Saibi, H., Meghraoui, M., Al-Garni, M. & Giroux, B. (Eds.). (2019). On Significant Applications of Geophysical Methods: Proceedings of the 1st Springer Conference of the Arabian Journal of Geosciences (CAJG-1), Tunisia 2018. Cham: Springer International Publishing
Open this publication in new window or tab >>On Significant Applications of Geophysical Methods: Proceedings of the 1st Springer Conference of the Arabian Journal of Geosciences (CAJG-1), Tunisia 2018
Show others...
2019 (English)Collection (editor) (Other academic)
Abstract [en]

This edited volume is based on the best papers accepted for presentation during the 1st Springer Conference of the Arabian Journal of Geosciences (CAJG-1), Tunisia 2018. This special volume is of interest to all researchers practicing geosphysicists/seismologists, students of PG and UG in the fields of multifaceted Geoscience. Major applications with relevant illustrations presented in the volume are from Middle East. And therefore, this book no doubt would serve as a reference guide to all geoscientists and students in the broad field of Earth Science. This volume covers significant applications of gravity and magnetic methods, electrical and electromagnetic methods, refraction and reflection seismic methods besides a large number of study on earthquakes, tectonics and geological settings etc. The salient features of this volume are the interpretation and modeling of geophysical data of different nature

Place, publisher, year, edition, pages
Cham: Springer International Publishing, 2019. p. 190
Series
Advances in Science, Technology & Innovation, ISSN 2522-8714, E-ISSN 2522-8722
Keywords
Geosciences
National Category
Geophysics Other Earth and Related Environmental Sciences
Research subject
ENGINEERING, Geodesy
Identifiers
urn:nbn:se:hv:diva-13745 (URN)10.1007/978-3-030-01656-2 (DOI)978-3-030-01655-5 (ISBN)978-3-030-01656-2 (ISBN)
Available from: 2019-03-21 Created: 2019-03-21 Last updated: 2019-08-21Bibliographically approved
Eshagh, M. (2019). Work-integrated learning and Surveying Engineering Education. In: Kristina Johansson (Ed.), VILÄR 5-6 december 2019, University West, Trollhättan: Abstracts. Paper presented at VILÄR 5-6 december 2019, University West, Trollhättan (pp. 8-8). Trollhättan: University West
Open this publication in new window or tab >>Work-integrated learning and Surveying Engineering Education
2019 (English)In: VILÄR 5-6 december 2019, University West, Trollhättan: Abstracts / [ed] Kristina Johansson, Trollhättan: University West , 2019, p. 8-8Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

Surveying Engineering Education (SEE) programmes are often of three years and the students learn how to model the shape of the Earth's surface by specific instruments, applying mathematics and computer software. They are inherently practically-oriented and majority of their courses contain simulated practical assignments close to the job market. Work-integrated learning (WIL), which is an approach to intentionally involve learners with practical works so that the learn the concepts by using them, is a suitable for SEEs. Different WIL models such as simulated assignment, collaborative learning with help of industry, and cooperative education, are applicable in SEE, which can increase the students' self-confidence, motivation, academic performance, and employability potential in addition to prepare them for working environments. Here, the focus is on the cooperative education in SEE, which is done outside universities. Literatures about WIL lacks attention to SEEs, there is a need for more researches with focus on the state-of-the-actual in this subject rather to see challenges in the work placement of students in business-oriented private sectors. Our literature study and interviews of three graduates from three subsequent graduation years and two students having experience in work placement showed clear supports of the governmental organisations. However, some students experienced difficulties in private companies. The job has been stressful for them and they were sometimes used like labours. Making clear agreements with private companies, clarifying the roles and missions of the students and companies, covering the costs and compensating time are important factors, which need to be considered. Inviting active engineers from companies for performing simulated assignments close to reality at campus will be very helpful for preparing the students for work placement for practical parts of the courses. It is also recommended that cooperative education needs to be performed with a full supervision of university.

Place, publisher, year, edition, pages
Trollhättan: University West, 2019
Keywords
Survey engineering, work-integrated learning
National Category
Learning
Research subject
Work Integrated Learning
Identifiers
urn:nbn:se:hv:diva-14886 (URN)978-91-88847-43-0 (ISBN)978-91-88847-44-7 (ISBN)
Conference
VILÄR 5-6 december 2019, University West, Trollhättan
Available from: 2020-01-20 Created: 2020-01-20 Last updated: 2020-01-20Bibliographically approved
Eshagh, M., Johansson, F., Karlsson, L. & Horemuz, M. (2018). A case study on displacement analysis of Vasa warship. Journal of Geodetic Science, 8(1), 43-54
Open this publication in new window or tab >>A case study on displacement analysis of Vasa warship
2018 (English)In: Journal of Geodetic Science, ISSN 2081-9919, E-ISSN 2081-9943, Vol. 8, no 1, p. 43-54Article in journal (Refereed) Published
Abstract [en]

Monitoring deformation of man-made structures is very important to prevent them from a risk of collapse and save lives. Such a process is also used for monitoring change in historical objects, which are deforming continuously with time. An example of this is the Vasa warship, which was under water for about 300 years. The ship was raised from the bottom of the sea and is kept in the Vasa museum in Stockholm. A geodetic network with points on the museum building and the ship's body has been established and measured for 12 years for monitoring the ship's deformation. The coordinate time series of each point on the ship and their uncertainties have been estimated epoch-wisely. In this paper, our goal is to statistically analyse the ship's hull movements. By fitting a quadratic polynomial to the coordinate time series of each point of the hull, its acceleration and velocity are estimated. In addition, their significance is tested by comparing them with their respective estimated errors after the fitting. Our numerical investigations show that the backside of the ship, having highest elevation and slope, has moved vertically faster than the other places by a velocity and an acceleration of about 2 mm/year and 0.1 mm/year2, respectively and this part of the ship is the weakest with a higher risk of collapse. The central parts of the ship are more stable as the ship hull is almost vertical and closer to the floor. Generally, the hull is moving towards its port and downwards

Keywords
error estimation; coordinate and displacement time series; significance test
National Category
Infrastructure Engineering
Research subject
ENGINEERING, Geodesy
Identifiers
urn:nbn:se:hv:diva-12231 (URN)10.1515/jogs-2018-0006 (DOI)000438302000006 ()
Available from: 2018-03-29 Created: 2018-03-29 Last updated: 2019-10-22Bibliographically approved
Eshagh, M., Steinberger, B., Tenzer, R. & Tassara, A. (2018). Comparison of gravimetric and mantle flow solutions for sub-lithopsheric stress modeling and their combination. Geophysical Journal International, 213(2), 1013-1028
Open this publication in new window or tab >>Comparison of gravimetric and mantle flow solutions for sub-lithopsheric stress modeling and their combination
2018 (English)In: Geophysical Journal International, ISSN 0956-540X, E-ISSN 1365-246X, Vol. 213, no 2, p. 1013-1028Article in journal (Refereed) Published
Abstract [en]

Based on Hager and O’Connell’s solution to mantle flow equations, the stresses induced by mantle convection are determined using the density and viscosity structure in addition to topographic data and a plate velocity model. The solution to mantle flow equations requires the knowledge of mantle properties that are typically retrieved from seismic information. Large parts of the world are, however, not yet covered sufficiently by seismic surveys. An alternative method of modeling the stress field was introduced by Runcorn. He formulated a direct relation between the stress field and gravity data, while adopting several assumptions, particularly disregarding the toroidal mantle flow component and mantle viscosity variations. A possible way to overcome theoretical deficiencies of Runcorn’s theory as well as some practical limitations of applying Hager and O’Connell’s theory (in the absence of seismic data) is to combine these two methods. In this study, we apply a least-squares analysis to combine these two methods based on the gravity data inversion constraint on mantle flow equations. In particular, we use vertical gravity gradients from the Gravity field and steady state Ocean Circulation Explorer that are corrected for the gravitational contribution of crustal density heterogeneities prior to applying a localized gravity-gradient inversion. This gravitational contribution is estimated based on combining the Vening Meinesz-Moritz and flexural isostatic theories. Moreover, we treat the non-isostatic effect implicitly by applying a band-limited kernel of the integral equation during the inversion. In numerical studies of modeling, the stress field within the South American continental lithosphere we compare the results obtained after applying Runcorn and Hager and O’Connell’s methods as well as their combination. The results show that, according to Hager and O’Connell’s (mantle flow) solution, the maximum stress intensity is inferred under the northern Andes. Additional large stress anomalies are detected along the central and southern Andes, while stresses under most of old, stable cratonic formations aremuch less pronounced or absent. A prevailing stress-vector orientation realistically resembles a convergent mantle flow and downward currents under continental basins that separate Andean Orogeny from the Amazonian Shield and adjacent cratons. Runcorn’s (gravimetric) solution, on the other hand, reflects a tectonic response of the lithosphere to mantle flow, with the maximum stress intensity detected along the subduction zone between the Nazca and Altiplano plates and along the convergent tectonic margin between the Altiplano and South American plates. The results also reveal a very close agreement between the results obtained from the combined and Hager and O’Connell’s solutions. © The Author(s) 2018. Published by Oxford University Press on behalf of The Royal Astronomical Society.

Keywords
Gravitation; Integral equations; Least squares approximations; Lithology; Numerical methods; Plates (structural components); Seismology; Stresses; Structural geology; Viscosity, Continental basins; Continental lithosphere; Gravity anomalies and Earth structures; Gravity field and steady state ocean circulation explorers; Least squares analysis; Maximum stress intensity; Satellite gravity; Seismic information, Tectonics
National Category
Geophysics
Research subject
ENGINEERING, Geodesy
Identifiers
urn:nbn:se:hv:diva-12246 (URN)10.1093/gji/ggy033 (DOI)000448720300021 ()2-s2.0-85044350246 (Scopus ID)
Available from: 2018-04-09 Created: 2018-04-09 Last updated: 2019-10-22Bibliographically approved
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Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-0067-8631

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