The map above simulates a 300-kiloton nuclear airburst over Jakarta, Indonesia — roughly the size of a modern deployed warhead. The coloured rings show the estimated fireball, the zones of heavy, moderate and light blast damage, the reach of the thermal flash and the ionizing-radiation dose. Drag the marker or change the weapon in the full simulator to explore other scenarios.
The metropolitan area is home to about 34 million people — the rings above are drawn to real scale over their homes.
The marker is over Menteng and Setiabudi, the government and business heart of Central Jakarta, a few kilometres south of the National Monument. The 1.9 km zone of total destruction covers the Sudirman–Thamrin business corridor and the embassy district; the 4.7 km collapse ring reaches Monas, the Presidential Palace, Tanah Abang market and the Kuningan towers. Third-degree burns extend to about 7.5 km, over the kampungs of Tanah Abang, Senen and Mampang that pack several tens of thousands of people into each square kilometre; the 14.5 km ring of broken windows reaches Kota Tua, the port of Tanjung Priok's approaches, Kemang and the Senayan stadium.
Greater Jakarta is the second-largest urban area in the world, around 34 million people, and the city itself is flat, low-lying and built up without a break, so the rings fall almost entirely on inhabited ground. Indonesia has no nuclear weapons and no nuclear-armed neighbour, which makes this a pure what-if; the effects article explains what each ring would mean on the ground.
Language 
