Water chemistry and soil radon survey at the Poas volcano (Costa Rica)

Jorge Barquero (1) , Erick Fernandez (1) , Michel Monnin (2) , Jean Luc Seidel (2) , Nuria Segovia (3)

1 Observatorio Vulcanológicoy Sismológico de Costa Rica
2 HSM - Hydrosciences Montpellier
3 Instituto Nacional de Investigaciones Nucleares

Radon-in-soil monitoring at the Poas volcano (Costa Rica) has been performed together with water chemistry from the hot crater lake since 1981 and 1983 respectively. The results are discussed as a function of the eruptive evolution of the volcano over a 13 years period (1981-1994). It is shown that no definitely clear precursory radon signals have been recorded. On the contrary, ionic species concentrations are likely to be considered good precursors, together with the temperature variations of the crater lake water.

Domaines: Planète et Univers [physics]

Jorge Barquero, Erick Fernandez, Michel Monnin, Jean Luc Seidel, Nuria Segovia. Water chemistry and soil radon survey at the Poas volcano (Costa Rica). Annals of Geophysics, 2009, 48 (1), ⟨10.4401/ag-3195⟩. ⟨insu-03448774⟩