Figures index

From

Delineation of Crustal Structure at VLC Seismographic Station Using Joint Inversion of Receiver Functions and Dispersion Data

Ohaegbuchu H. E., Igboekwe M. U., Chukwu G. U.

Journal of Geosciences and Geomatics. 2015, 3(4), 109-115 doi:10.12691/jgg-3-4-3
  • Figure 1. Broadband seismographic stations of MEDNET
  • Figure 2. Cellular structural model extended down to 350 km depth for the cell containing VLC station (d0) and its neighbours. Yellow to brown colours represent crustal layers, blue to violet colours indicate mantle layers. Red dots denote all seismic events collected by ISC with magnitude greater than 3 (1904-2006). For each layer VS variability range is reported. The uncertainty on thickness is represented by texture (modified from Brandmayr et al [4])
  • Figure 3. Group velocity dispersion curve (left) and receiver functions (right) jointly inverted. The blue lines are the experimental data while the red lines indicate the chosen theoretical receiver functions, corresponding to the best percent of fit
  • Figure 4. Initial models used for the inversion
  • Figure 5. Final S-wave velocity models of the joint inversion.
  • Figure 6. Chosen solution for VLC station, result of the joint inversion of receiver functions and dispersion data. The high velocity LID, centered at a depth of about 100 km, seems to reveal the presence of a subducted slab
  • Figure 7. Shear wave velocity cross-section of the study area with distribution of earthquake hypocenters (black dots) with depth
  • Figure 8. (a) LogN-h, distribution of number of earthquakes with respect to depth, obtained by grouping hypocenters in 5-km of interval. (b) LogE-h distribution of logarithm of energy released with respect to depth