1064 PHLEGRAEAN FIELDS UNDER PRESSURE: pink Lake Avernus and extreme temperatures
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1064 PHLEGRAEAN FIELDS UNDER PRESSURE: pink Lake Avernus and extreme temperatures
1 Mar 2026
The Phlegraean Fields, a complex volcanic system, are showing signs of pressure and temperature changes. While the pink hue of Lake Avernus is a chemical-biological phenomenon, the overall system remains dynamic with ongoing deformation, gas emissions, and high temperatures. Daily monitoring and data collection are crucial for understanding and responding to these changes.
https://youtu.be/3kRGB10T47E?si=uzVQn55q5rQQmmVT
- Lake Avernus Observation: Drones observed Lake Avernus tinged with pink.
- Pisciarelli Fumarole Activity: Less visible degassing but increased pressure and forceful hydrothermal mud expulsion, reminiscent of the activity preceding a significant tremor in March 2025.
- Pisciarelli Temperature Trend: Stable at 105.8°C, but monthly and annual trends show persistence, indicating ongoing energy supply in the hydrothermal system.
- Solfatara Crater Pressure and Temperature: High internal pressure from gas push, with a constant high temperature of 184.9°C at the Boccagrande fumarole.
- Lake Avernus Pink Hue: Caused by a chemical-biological phenomenon due to changes in water composition, likely from the proliferation of halophilic microorganisms or precipitation of iron-rich minerals.
- Volcanic Activity Indicators: The pink lake colour, while not directly caused by bradyseism, indicates a dynamic system due to changing environmental parameters.
- Campi Flegrei Caldera Monitoring: Ongoing deformation, gas emissions, high temperatures, mud expulsion, and drying pools suggest the caldera remains active.
- Importance of Transparency and Monitoring: Continuous observation, data collection, and transparent communication are crucial for understanding and responding to the caldera’s activity.
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