Large efforts have been made by the volcano observatories and institutions responsible for data collection and evaluation. Thus data presented here can be used on the condition that these organizations and people are given proper credit for their work, following normal practice in scientific communication:

• If data from this repository contributes an important part of the work, co-authorship should be offered to the listed contributors and the data-set should be cited.
• If data from this repository contributes only a small, but still important part of the work, the data-set should be cited.

To cite a data-set include the information provided in the respective metadata. For example:

Delgado, H., Arellano, S., Rivera, C., Fickel, M., Alvarez, J., Galle, B., SO₂ flux of -POPOCATEPETL- volcano, from the NOVAC data-base; 2020; [Data set]; v.001; doi:10.17196/novac.popocatepetl.001

Additional data, data with higher time resolution and raw data may be made available upon request to the respective Volcano Observatories and the Database contacts.

This data-set has license: CC BY 4.0.