Sunda Trench is considered to be part of the Pacific Ring of Fire as well as one of a ring of oceanic trenches around the northern edges of the Australian Plate. In 2005, scientists found evidence that the 2004 earthquake activity in the area of the Java Trench could lead to further catastrophic shifting within a relatively short period of time, perhaps less than a decade. This threat has resulted in international agreements to establish a tsunami warning system in place along the Indian Ocean coast. For about half its length, off of Sumatra, it is divided into two parallel troughs by
West Java Java Province to Central or East Java Provinces is literally said to be moving from Sunda to Java worlds. Bandung, the capital city of West Java, is considered as the cultural heartland of Sundanese people. Many indigenous Sundanese artforms were developed in this city. The nearby province of Banten, which was formerly part of West Java before it became its own province, is similar in this regard and is also considered to be part of "Pasundan" as well. The musical arts of Sunda, which is an expression of the emotions of Sundanese culture, express politeness and grace of Sundanese. Degung