Red SO2 Map Over Jakarta Not Necessarily Dangerous, Geology Agency Clarifies

Indonesia's Geology Agency has clarified that a red map indicating high concentrations of sulfur dioxide (SO2) over Jakarta, stemming from the eruption of Mount Anak Krakatau, does not immediately signify dangerous air pollution levels. The agency stated on its official Instagram account that the eruption also releases SO2 gas, which has caused public concern circulating on social media. "In addition to volcanic ash and pyroclastic flows, the eruption of G. Anak Krakatau in the Sunda Strait also releases SO2 gas, and information circulating on social media regarding SO2 gas has sparked public anxiety," the agency said. The SO2 map displayed dark red patches above Jakarta and West Java, extending towards Lampung and the Indian Ocean. The agency explained that while SO2 (sulfur dioxide) is a colorless, toxic gas with a very pungent odor, its danger depends on its altitude in the troposphere. At certain heights, it is not directly inhaled by the public. Geology Agency officials emphasized that the satellite map shows the total amount of SO2 in the atmospheric column at a specific altitude, not the concentration of gas at ground level. They reiterated that the red map does not mean the air in Jakarta is dangerous. "This red map does not mean the air in Jakarta is dangerous. The meaning of the red color is an anomaly of SO2 concentration higher than normal air in the atmospheric layer, not a surface air quality number," the agency stated. Despite this clarification, the government has urged the public to remain vigilant about any sulfurous odors (SO2) from the volcano's activity. Citizens are advised to limit outdoor activities, wear masks, and avoid drinking rainwater, which may become acidic and harmful to the body.