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Additional Supporting Information may be found in the online version of this article.

FilenameFormatSizeDescription
ggge20150-sup-0001-SuppInfo.pdf1537K

Supporting Information Figure S1a. P-wave arrival time delays plotted against back azimuths and great circle distances for events recorded on collocated stations between various networks; (a) GOMA and KGMA, (b) INZA and UVZA, (c) LONG and MAUS, (d) PAND and MBEY, (e) KMBO2002 and KMBO2010.

ggge20150-sup-0002-SuppInfo.pdf1704K

Supporting Information Figure S1b. S-wave arrival time delays plotted against back azimuths and great circle distances for events recorded on co-located stations between various networks; (a) GOMA and KGMA, (b) INZA and UVZA, (c) LONG and MAUS, (d) PAND and MBEY, (e) KMBO2002 and KMBO2010.

ggge20150-sup-0003-SuppInfo.pdf474K

Supporting Information Figure S2. Histograms of relative arrival time residuals for (a) P-waves and (b) S-waves.

ggge20150-sup-0004-SuppInfo.pdf415K

Supporting Information Figure S3. 3D model space representation of the knot locations used in this study. The red box (1000-100 km depths, −20-4¡ latitude, 25-42¡ longitude) with the smallest knots spacing defines the region where the highest resolution is expected. Geological features are the same as in Figure 2.

ggge20150-sup-0005-SuppInfo.pdf463K

Supporting Information Figure S4. Trade-off between relative arrival-time residual reduction (data fitting) and model roughness for P-wave (top) and S-wave (bottom) inversion velocity model. The red symbols correspond to combinations of flattening and smoothing parameters tested, with the blue circle indicating the optimum parameters used for the final tomography models. These values were selected to balance reasonable RMS travel time residual reductions with realistic model roughness values.

ggge20150-sup-0006-SuppInfo.pdf3346K

Supporting Information Figure S5. Horizontal cross-sections sliced through (a-c) the P-wave velocity model (d-f) the S-wave velocity model at 700, 800 and 900 km depths. Areas with hit counts of < 5 are darkened. Black squares represent station locations and the East African Rift is shown with bold black lines. The bold white line shows the outline of the Tanzania Craton.

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