NEW SACS SO₂ ALERT SYSTEM:
a multi-sensor approach with SCIAMACHY, OMI, GOME2, IASI and AIRS

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       Volcanic activity has been really important in May-June 2011 with 3 major eruptions
(Grímsvötn volcano in Iceland, Puyehue-Cordon Caulle volcano in Chile and Nabro volcano in Erithrea).

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