Volcanic activity Alban Hills

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aerial view showing main caldera , several secondary ones around rim


examination of deposits have dated 4 recent eruptions 2 temporal peaks, around 36,000 , 39,000 years ago. area exhibits small localised earthquake swarms, bradyseism, , release of carbon dioxide , hydrogen sulfide atmosphere. uplift , earthquake swarms have been interpreted caused growing spherical magma chamber 5-6 kilometres below surface; think may erupt again; if so, there risk rome, 25 30 km away.


there documentary evidence may describe eruption in 114 bc, absence of holocene geological deposits has largely discredited volcanic event , instead account considered description of forest fire.


the volcano emits large amounts of carbon dioxide can potentially reach lethal concentrations if accumulates in depressions in ground in absence of wind. asphyxiation of 29 cows in september 1999 prompted detailed survey, found concentration of gas @ 1.5 m above ground in residential area on northwestern flank exceeded occupational health threshold of 0.5%. 8 sheep killed in similar incident in october 2001.




volcanic lakes view monte cavo.








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