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
1943 Central Java earthquake 1943 Central Java earthquake The 1943 Central Java earthquake occurred on July 23 at 14:53:10 UTC with a moment magnitude of 7.0 near Java, which was under Japanese occupation. The Yogyakarta depression area is mostly covered by alluvium and the volcanic deposit of Mount Merapi. The Yogyakarta depression area is located between the volcanic arc of the Central Java and the Java Trench. The earthquake affected the Yogyakarta depression area in Central Java. It caused about 213 deaths and over 3,900 injuries. More than 12,600 houses collapsed. This earthquake caused damage in Central Java from Garut in the west to