Sunda Trench an underwater ridge, and much of the trench is at least partially filled with sediments. Mappings after the 2004 Indian Ocean earthquake of the plate boundary showed resemblance to suspension bridge cables, with peaks and sags, indicative of asperity and locked faults, instead of the traditional wedge shape expected. Some of the earliest exploration of the Trench occurred in the late 1950s when Robert Fisher, Research Geologist at the Scripps Institution of Oceanography, investigated the trench as part of a worldwide scientific field exploration of the world's ocean floor and sub-oceanic crustal-structure. Bomb-sounding, echo-train analysis and manometer were some of
Diamantina, Minas Gerais lowest rating in the country—0,467—putting it in last place. There were 2 hospitals and 31 health clinics in 2005. Educational needs were met by 30 primary schools and 9 middle schools. There were 3 institutions of higher learning: Faculdade de Ciências Jurídicas de Diamantina - FCJ (a law school), Faculdade de Filosofia e Letras de Diamantina - FAFIDIA (humanities), and Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM (federal public). Diamantina is twinned with: Diamantina, Minas Gerais Diamantina () is a Brazilian municipality in the state of Minas Gerais. Its estimated population in 2006 was 44,746 in a