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- W4255461320 abstract "Abstract. In this paper we focus on the potential risks caused by the sub-10 micron fraction of volcanic ash (particulate matter: PM10) after the basaltic explosive eruptions from Mt Etna volcano (Italy), which have dramatically increased in frequency over the last 20 years. We present results deriving from the study of the ash concentration in the air following the lava fountain episode from the New South-East Crater of Etna on 15 November 2011, which caused tephra fallout over the eastern slope of the volcano. Short-duration tests of PM10 measurements were carried out at three different sites using a TSI® DustTrakTM aerosol monitor a few hours after the end of the eruption, and readouts of the air quality were repeated at the same sites a month later without volcanic activity. Furthermore, ash samples were characterized by grain-size, componentry, morphological and petro-chemical analyses. By comparing PM10 levels measured a few hours after the 15 November lava fountain and on 15 December, we found that relatively low amounts (500–1500 g m-2) of tephra fallout cause high levels of PM10 in the air. This is because the coarse particles, like basaltic ash, are readily broken up by traffic and hence remobilized into the air, due to their intrinsic, physical and morphological features. We believe that in the future the impact from ash fallout in the Etnean territory should receive proper attention in order to avoid potential health problems; this may be achieved by accomplishing simple but effective actions, first and foremost the prompt removal of the ash deposits from the urbanized areas." @default.
- W4255461320 created "2022-05-12" @default.
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- W4255461320 date "2015-06-16" @default.
- W4255461320 modified "2023-09-26" @default.
- W4255461320 title "PM<sub>10</sub> measurements in urban settlements after lava fountain episodes at Mt Etna, Italy: pilot test to assess volcanic ash hazard on human health" @default.
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- W4255461320 doi "https://doi.org/10.5194/nhessd-3-3925-2015" @default.
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