1. CNN. Mt. Nyiragongo Volcano: 92 Earthquakes and Tremors Recorded in Past 24 Hours – CNN. Available from: https://edition.cnn.com/2021/05/30/africa/drc-volcano-tremors-intl/index.html. [Last accessed on 2021 Jun 23].
2. Dynamics of the mount nyiragongo lava lake;Burgi;J Geophys Res Solid Earth,2014
3. CNN. Taal Volcano: Philippines Raises Danger Level as thousands Evacuate – CNN. Available from: https://edition.cnn.com/2021/07/01/asia/mass-evacuation-philippines-volcano-intl-hnk/index.html. [Last accessed on 2021 Jul 02].
4. Decker B, Decker R. Volcano – Six Types of Eruptions | Britannica; 2018. Available from: https://www.britannica.com/science/volcano/Six-types-of-eruptions. [Last accessed on 2021 Jun 22].
5. Health hazards from volcanic gases: A systematic literature review;Hansell;Arch Environ Health,2004