Sun da Trench lies in

The Sunda Trench, also widely known as the Java Trench, is located in the eastern Indian Ocean [t1][t4]. It is a major oceanic trench formed by the subduction of the Indo-Australian plate beneath the Sunda Plate, which is a part of the larger Eurasian Plate [c1][t4]. Stretching approximately 3,200 kilometres, it curves around the southern coast of Sumatra and Java in the Indonesian archipelago [t4][t8]. With a maximum depth of approximately 7,290 to 7,450 metres, it represents the deepest point in the Indian Ocean [t2][t4][t10]. The trench is geologically significant as an active subduction zone associated with intense seismic activity and volcanism, including the catastrophic 2004 Indian Ocean earthquake [t4][t10]. While the Pacific Ocean contains the majority of the world's trenches, the Sunda Trench is the most prominent feature of its kind in the Indian Ocean [c2][c3].

Sources

1. [1] https://en.wikipedia.org/wiki/Sunda_Trench
2. [2] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 8: Convergent Boundary > Formation of The Indonesian Archipelago > p. 112
3. [3] https://www.sciencedirect.com/science/article/pii/S001282521830429X
4. [4] https://www.britannica.com/place/Java-Trench
5. [5] FUNDAMENTALS OF PHYSICAL GEOGRAPHY, Geography Class XI (NCERT 2025 ed.) > Chapter 12: Water (Oceans) > Oceanic Deeps or Trenches > p. 102
6. [6] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 31: Ocean Relief > Oceanic Deeps or Trenches > p. 482