1. Observatorio Vulcanológico y Sismológico de Costa Rica Universidad Nacional Heredia Costa Rica
2. Department of Earth and Planetary Sciences University of New Mexico Albuquerque NM USA
3. Department of Earth and Planetary Sciences McGill University Montreal Québec Canada
4. Gas Sensing Lab, CICANUM, Physics School Universidad de Costa Rica San José Costa Rica
5. Dipartimento DiSTeM Università di Palermo Palermo Italy