![]() It has been polished to a mirror like finish on all sides and features sagenite crystal formations scattered throughout agate. An extended series of websites includes comprehensive career development resources. This is a gorgeous, 2.9' wide slab of Indonesian 'Sumatra Flame' Sagenite Agate. AAAS also acts as an umbrella organization for a federation of more than 270 affiliated scientific groups. Public engagement activities are creating an open dialogue with scientists on societal issues such as global climate change. Below northern Sumatra, we find that the slab is folded at depth, exhibiting geometry similar to that of the volcanic arc and the trench at the surface. The deviation between observed and calculated clearly shows that the age of subducting lithosphere alone cannot be used to reconstruct shallow slab dips, and that further parameters need to be incorporated into the calculations, such as horizontal and vertical mantle flow, and down-going plate motions. Science education initiatives have laid the groundwork for standards-based learning and provide web-based support tools for teachers. Observed SSD (0125 km) for the Andaman, Sumatra and Java regions are 24.6, 23.9, and 22.7, respectively, while our calculated SSD are 29, 25.5, and 36, respectively. Science and policy programs include the major annual forum on Science & Technology policy, S&T policy fellowships within the US Congress and government agencies, and the tracking of US funding for R&D research. Global efforts include programs and partnerships worldwide, from Asia to Europe to Africa, and extensive work in human rights using geospatial technology to corroborate abuses. The mission, to "advance science, engineering, and innovation throughout the world for the benefit of all people," has propelled the organization to the forefront of national and international initiatives. We interpret a vertical slab tear crossing the entire upper mantle north of west Sumatra where there is a strong lateral kink in slab morphology, slab holes between c.200400 km below East Java. ![]() 2School of Physics, Universiti Sains Malaysia, 11800, Pulau Penang, Malaysia. AAAS, founded in 1848, has evolved into the world's largest multidisciplinary scientific society with nearly 130,000 members and subscribers. Seismic tomographic imaging of P wave velocity perturbation beneath Sumatra, Java, Malacca Strait, Peninsular Malaysia and Singapore ABEL UYIMWEN OSAGIE 1, and ISMAIL AHMAD ABIR 2 1Department of Physics, University of Abuja, P.M.B 117, Abuja, Nigeria.
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