COSTA RICA
VOLCAN POAS
[2706 m.a.s.l]. It has three craters, only one active. It measures 1500 metres lengh (the second widest crater of the world), and 300 metres of depth. On its bottom there is the most active bubling lake in the world. Its geiser eruptions shoot at 40 metres above. To the north from the main crater, Von Frantzius crater (the oldest one) is situated. The third crater Botos is filled with blue water lake and ringed by thick forests. The first mention of Poas volcanic activity dates back to 1834. Its eruption from 1889 made an earthquake, due to which, a piece of volcanic wall was torn off and a deep hole filled with water was made. (Fraijanes Lake). During the eruption from 1910, the ash cloud was shot 8.000 metres into the air. In 1952-1954 there were similar clouds ashes substituted by deep tremors. Since 1989 the increase of gas emissions has been observed. It`s in charge of acid rains, that destroyed the strawberry plantations on the western side of volcanoe.
PROVINCE OF ALAJUELA
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