In the observations is highlighted an ash fall in San José in January and February of 1866 (4 and 8 Days respectably). These ashes come from a estrombolean eruptions of the Turrialba volcano in January and February (Volcanic Explosivity Index 3). San José is 45km from Turrialba volcano but during this event ash fall was reported also in Puntarenas (115 km distance to the volcano) (Duarte González, 2014).---The data of this dataset might have been revised during the review process. This might therefore be an old version. To be sure, please check the respective dataset at doi:10.1594/PANGAEA.871480