## 4 Three-Dimensional Magnetic Field Modeling
### Easternmost Mediterranean  
[PERSON] et al. [28], based on integrated seismic-gravity-magnetic (with thermal data attraction) analysis, have verified the existence of oceanic crust in the Levant Basin (in the EMM middle zone) and the presence of continental crust under the Eratosthenes Seamount. Investigating the EMM deep structure requires thorough attention to the basaltic crust blocks with the discovered reverse magnetization [22; 28]. This issue was justified as a Kiana paleomagnetic hyperzone of inverse polarity [19; 23], which requires a separate comprehensive examination. Three-dimensional magnetic-gravity modeling conducted along three interpreting profiles, supported by seismic data along the same lines (the location of these profiles is shown in Figure 12) and areal tectonic-geodynamic studies, unambiguously indicate the existence of the Earth's crust blocks with reverse magnetization. Figure 12: Location of profiles I, II, III, and IV superimposed on the geodynamic–bathymetric map of the Easternmost Mediterranean (modified after [19; 28]). (1) Interplate faults, (2) intraplate faults, (3) deep fault separating the Alpine belt and oceanic depression, (4) bathymetry. Thus, this research, for the first time, presents combined coordinated seismic-magnetic-gravity models for three crossing profiles (Profiles I, II, and III are shown in Figures 13-15, respectively). The most challenging process was the 3D magnetic field modeling (hundreds and hundreds of iterations were applied), considering very complex and magnetically variable media. It was shown [34] that integrated interpretation of three independent geophysical fields (assuming that three anomalous points characterize each field) increases the interpretation reliability using the error function three times. In our case, the number of anomalous points is many times larger; consequently, the interpretation reliability is increased. Figure 13: Results of 3D magnetic-gravity modeling along Profile I (see the location of this profile in Figure 12) (modified after [19; 28]). Figure 14: Results of 3D magnetic-gravity modeling along Profile II (see the location of this profile in Figure 12) (modified after [19,28]). Figure 13 displays the results of 3D combined magnetic-gravity modeling along Profile I. The complexity of 3D magnetic field modeling exceeds the gravity field modeling by several times. The main peculiarities of the PGM for Profile I are the revealed crystal block with inverse magnetization (about \(-120^{\circ}\)) in the center of profile [28] (slightly yellow colored) and a crystal block of continental crust with inverse magnetization in the eastern part of this profile (about \(-45^{\circ}\)) (brightly brown colored). The same inversely magnetized blocks were discovered in Profile II (Figure 14) and Profile II (Figure 15). Another example shows the developed PGM along the profile crossing the Dead Sea Transform (DST) within the Sea of Galilee (Profile IV), also obtained using 3D combined gravity-magnetic field modeling (Figure 16) (the location of this profile is shown in Figure 12). A preliminary PGM of this profile was constructed on the data of [29; 31; 44; 52; 53; 54; 55]. Figure 15: Results of 3D magnetic-gravity modeling along Profile III (see the location of this profile in Figure 12) (modified after [19; 28]). Predominantly, the low-density sedimentary deposits and salt accumulated in the DST zone produce the negative gravity anomaly along Profile IV (Figure 16). A comprehensive analysis of magnetic field behavior indicates that it has a more complex character. Such a magnetic field behavior cannot be explained by effects from subsurface basalts (and by anomalies from any basaltic plates (bodies) occurring at low depths). The present magnetic pattern in these physical-geological conditions may be provided only by a deep crystal block with an inverse magnetization. It confirms the detecting crystal block with the same magnetization direction in the land's easternmost part of Profile I (see Figure 13).