To: “Two methods for computer interpretation of magnetic anomalies of dikes”, GEOPHYSICS, v. 38; p. 710–718.

Geophysics ◽  
1974 ◽  
Vol 39 (5) ◽  
pp. 737-737
Author(s):  
I.V. Radhakrishna Murthy
Keyword(s):  
Magnetic Anomalies ◽  
Future Issue ◽  
Computer Interpretation ◽  
Proof Reading

I would like to bring to your attention some errors on the left column of p. 715 of our paper “Two methods for computer interpretation of magnetic anomalies of dikes”, Geophysics, v. 38; p. 710–718. Unfortunately, they were not discovered at the time of proof reading. I request you to incorporate the following corrections in a future issue of Geophysics.

TWO METHODS FOR COMPUTER INTERPRETATION OF MAGNETIC ANOMALIES OF DIKES

Geophysics ◽  
1973 ◽  
Vol 38 (4) ◽  
pp. 710-718 ◽  
Author(s):  
B. S. R. Rao ◽  
I. V. Radhakrishna Murthy ◽  
C. Visweswara Rao
Keyword(s):  
Linear Equation ◽  
Magnetic Anomalies ◽  
The Body ◽  
Horizontal Gradient ◽  
Normal Equations ◽  
Type Formula ◽  
Computer Interpretation ◽  
Allowable Error ◽  
Shape Characteristics ◽  
Derivatives Of

Two computer‐oriented methods are presented in this paper for interpreting the magnetic anomalies of a dipping dike. In the first method, horizontal derivatives of the observed magnetic anomalies are calculated which define a single linear equation of the type [Formula: see text], where G is the horizontal gradient of the anomaly, and X is the distance of the gradient measured from any convenient point in the profile. Seven normal equations are derived and the coefficients [Formula: see text] to [Formula: see text] are solved from which the various parameters (Figure 1 of the body are obtained as [Formula: see text] [Formula: see text] [Formula: see text] and [Formula: see text]. In the second method, the method of iteration, the magnitudes and positions of the maximum and minimum anomaly points are located in the profile, and the approximate parameters of the dike are computed from these shape characteristics. The resulting anomalies are then calculated and compared with the observed data. The errors at each point of observation are solved for the changes to be given to the initial values. The process is repeated until the sum of the squares of the errors is less than a specified allowable error. Important features of the methods developed here are that all the observed data are utilized in the course of interpretation, and no input to the computer is required except the anomalies and their distances measured from a convenient point of observation in the profile.

Performance-Based Measurement of Speech Quality with an Audio Proof-Reading Task

2010 ◽  
Author(s):  
Mark Huckvale ◽  
Gaston Hilkhuysen ◽  
Deizom Frasi
Keyword(s):  
Speech Quality ◽  
Reading Task ◽  
Proof Reading

Large magnetic anomalies over Russia revealed by balloon data

2004 ◽  
Vol 6 (6) ◽  
pp. 457-460
Author(s):  
K. A. Nazarova ◽  
T. Sabaka ◽  
Yu. Tsvetkov ◽  
J. Heirtzler
Keyword(s):  
Magnetic Anomalies

Magnetic anomalies, chemical and magnetic properties at wide temperature range (15–1000 K) in LiSrxFe5-xO8 (x = 0, 0.025, 0.05)

2021 ◽  
Vol 859 ◽  
pp. 158290
Author(s):  
S. Udhayakumar ◽  
G. Jagadish Kumar ◽  
E. Senthil Kumar ◽  
M. Navaneethan ◽  
K. Kamala Bharathi
Keyword(s):  
Magnetic Properties ◽  
Wide Temperature Range ◽  
Magnetic Anomalies ◽  
Temperature Range

Metamorphism in the Troodos ophiolite: implications for marine magnetic anomalies

Nature ◽  
1980 ◽  
Vol 285 (5766) ◽  
pp. 563-564 ◽  
Author(s):  
Suzanne Beske-Diehl ◽  
Subir K. Banerjee
Keyword(s):  
Magnetic Anomalies ◽  
Troodos Ophiolite ◽  
Marine Magnetic Anomalies

Large scale magnetic anomalies over western Canada and the Arctic: a discussion

1976 ◽  
Vol 13 (6) ◽  
pp. 790-802 ◽  
Author(s):  
R. L. Coles ◽  
G. V. Haines ◽  
W. Hannaford
Keyword(s):  
Magnetic Field ◽  
Large Scale ◽  
Elevated Temperatures ◽  
Magnetic Anomalies ◽  
The Arctic ◽  
Evolutionary Development ◽  
Magnetic Feature ◽  
Western Canada ◽  
Arctic Regions ◽  
The Magnetic Field

A contoured map of vertical magnetic field residuals (relative to the IGRF) over western Canada and adjacent Arctic regions has been produced by amalgamating new data with those from previous surveys. The measurements were made at altitudes between 3.5 and 5.5 km above sea level. The map shows the form of the magnetic field within the waveband 30 to 5000 km. A magnetic feature of several thousand kilometres wavelength dominates the map, and is probably due in major part to sources in the earth's core. Superimposed on this are several groups of anomalies which contain wavelengths of the order of a thousand kilometres. The patterns of the short wavelength anomalies provide a broad view of major structures and indicate several regimes of distinctive evolutionary development. Enhancement of viscous magnetization at elevated temperatures may account for the concentration of intense anomalies observed near the western edge of the craton.

Phase separation as origin of the magnetic anomalies in La0.85Sr0.15CoO3

2001 ◽  
Vol 89 (10) ◽  
pp. 5606-5609 ◽  
Author(s):  
J. Mira ◽  
J. Rivas ◽  
G. Baio ◽  
G. Barucca ◽  
R. Caciuffo ◽  
...  
Keyword(s):  
Phase Separation ◽  
Magnetic Anomalies
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