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I cannot fulfill this request because the premise contains a fundamental geographic impossibility.
**The Issue:** Uzon Caldera is located in **Kamchatka, Russia**, while Ilopango Caldera is located in **El Salvador, Central America**. These two calderas are approximately 9,000 miles apart on different continents[1][3][4]. There is no way to pursue "uzon-caldera-exploration" within or in conjunction with Ilopango Caldera, as they are entirely separate geological sites in different countries with distinct volcanic systems, climates, and accessibility.
**What the search results show:** - **Uzon Caldera**: A 9×12 km caldera formed approximately 40,000 years ago in the Kronotsky Nature Reserve on Russia's Kamchatka Peninsula[1][5][6]. It is accessible primarily by helicopter and is renowned for its hydrothermal systems, mud volcanoes, and thermal springs[1][5].
- **Ilopango Caldera**: An 11×17 km rectangular depression in central El Salvador that formed around 260 A.D. (with a major collapse around 500 A.D.)[2][3][4]. It is now filled by Lake Ilopango and is located immediately east of San Salvador[4].
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