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Fig. 4 | Earth, Planets and Space

Fig. 4

From: Mathematical review on source-type diagrams

Fig. 4

Projections to produce source-type diagrams. Steps to produce each source-type diagram using each projection are illustrated in sequential order. The original source-type diagram (middle column) and the source-type diagram after normalization (right column) are shown for each projection. For most diagrams, the corresponding surface in the moment tensor eigenvalue space is also shown (left column). In each 2D source-type diagram, the projected area is shown in green; solid lines represent sharp interfaces, across which a trace of a gradual change in the moment tensor can generate a curve with a cusp. h Spherical azimuthal projection diagrams \(\left( {p, q} \right)\) and \(\left( {\tilde{p}, \tilde{q}} \right)\). i Spherical cylindrical projection diagrams \(\left( {\gamma , \zeta } \right)\) and \(\left( {\tilde{\gamma }, \tilde{\delta }} \right)\). j Modified spherical cylindrical projection diagrams \(\left( {a, b} \right)\) and \(\left( {\tilde{a}, \tilde{b}} \right)\). k Spherical cylindrical orthogonal projection diagrams \(\left( {\chi , \zeta } \right)\) and \(\left( {\tilde{\chi }, \tilde{\zeta }} \right)\)

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