Recent motion of the African plates - Disaster Management Institute ...

Fig. 7. Velocity vector diagrams for HRAO and RBAY sites on the Transgariep (TG) block.Measured velocity vectors from Table 1 (diamond symbol with standard error bars on thickersolid line to origin) are compared with NB- and SM-ITRF2000 velocity models from Figs. 3 & 4above (respectively solid square on thin solid, and solid circle on dash-dotted lines) and NBandSM-ITRF97 velocity models from Sella et al. (2002; respectively open square on thinsolid, and open circle on dashed lines).Fig. 8. NB-SM angular velocity poles (numbered ring symbols) in relation to the wide plateboundary zone and GPS sites (labelled diamond symbols) in Southern and Eastern Africa.NB rotates anticlockwise relative to SM about the pole location. Recent motion pole (No. 1)from this study overlaps with the NUVEL1A-based (~3 Myr) solution of Chu & Gordon (1999;pole No. 5). Other poles are from Sella et al. (2002, pole No. 2), DeMets (2002, pole No. 3),and Kreemer (2002, pole No. 4). NB-SM poles farther west or south (Table 2) are not shown.18