Indonesia, as part of the Pacific Ring of Fire and the meeting point of three major tectonic plates (Indo-Australia, Pacific, and Eurasia), faces the threat of 13 Megathrust segments capable of triggering devastating earthquakes. These segments include the Mentawai-Suberut and Sunda Strait Megathrust zones. Recent warnings from the National Research and Innovation Agency (BRIN) and the Meteorology, Climatology, and Geophysics Agency (BMKG) highlight the potential hazards posed by the Megathrust Mentawai-Siberut and Sunda Strait Megathrust earthquakes, similar to the 2004 Aceh earthquake and tsunami. Among the most vulnerable Megathrust segments is the Southern coast of Java extending to the Sunda Strait, with the potential to cause earthquakes up to M 8.7 and tsunamis up to 20 meters high. Jakarta faces the risk of tsunamis ranging from 1 to 1.8 meters, reaching the city approximately 2.5 hours after a large tsunami hits the Southern coast of Java. Mitigation efforts involving structural and non-structural measures, such as building tsunami barriers, coastal area planning, and community education on disaster preparedness, are essential to anticipate and reduce the impact of such disasters.