Headline:
High Alert: Megathrust Threat Looms Large for Jakarta
Subhead:
Study warns of massive earthquake and tsunami potential in Java’s southern region, posing significant risk to the Indonesian capital.
Article:
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CNBC Indonesia, 01/04/2024
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Megathrust, the most powerful type of earthquake, poses a real threat to Jakarta. This is due to one of the locations of the megathrust zone, the Sunda Strait, being extremely close to the capital.
Key Takeaways:
- Megathrust earthquakes pose a significant threat to Jakarta.
- The Sunda Strait, near Jakarta, is a prime location for these earth-shattering events.
- An earthquake in this region could trigger a tsunami, with waves reaching Jakarta in about 2.5 hours.
- The potential height of tsunami waves is estimated between 20 meters in southern Java, 3-15 meters in the Sunda Strait, and 1.8 meters in Jakarta’s northern coast.
- Mitigation strategies, both structural and non-structural, are crucial to minimize the impact of such disasters.
In an alarming revelation, Nuraini Rahma Hanifa, a researcher from the Center for Geological Disaster Research at the Indonesian Institute of Sciences (BRIN), has highlighted the threat of a megathrust earthquake in southern Java. Such an event could generate a tsunami similar to the one that devastated Aceh in 2004.
According to Rahma, the megathrust segment in southern Java, inclusive of the Sunda Strait, harbors substantial tectonic energy, capable of triggering earthquakes measuring up to 9.1 on the Richter scale. Thiscould lead to intense shaking and a tsunami that could ripple through the Sunda Strait and reach Jakarta in approximately 2.5 hours.
Historical evidence, such as the 2006 Pangandaran tsunami, which was caused by a marine landslide near the Nusa Kambangan island, supports these findings. Moreover, research suggests that the energy building up in this zone has been accumulating for centuries, and the last major event occurred in 1699. Given the 400-600 year cycle, the region is long overdue for another cataclysmic earthquake.
To mitigate these dangers, BRIN emphasizes the importance of both structural and non-structural measures. Structural mitigation includes building tsunami barriers, wave breakers, and ordering the evacuation of coastal areas within a safe distance (at least 250 meters from the shore). Non-structural mitigation involves public education, tsunami drills, and identifying safe evacuation routes and locations.
For densely populated urban areas like Jakarta, building retrofitting is also crucial to strengthen existing structures and enhance their ability to withstand earthquakes.
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In light of the grave tsunami threat, it is crucial for authorities, communities, and individuals to take immediate action and prepare accordingly. The lessons learned from the 2004 Indian Ocean tsunami should serve as a stark reminder of the importance of preparedness and mitigation efforts.
Next Article:
Megathrust Waiting to Strike Java & Sumatra? Here’s What Experts Say
