For the first time in several decades, the volcano which produced Mexico's deadliest historical eruption is once again showing signs of unrest. What I am referring to is the El Chichon / Chichonal volcano, which produced a plinian eruption that resulted in 2,000 casualties and cooled world temperatures in 1982. This recent uptick in activity has involved an increase in earthquakes which is seemingly linked to a recent change in this volcano's hydrothermal system. Today's video will discuss through the opinion and analysis of a geologist.
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Sources/Citations:
[1] Brown, S.K., Jenkins, S.F., Sparks, R.S.J. et al. Volcanic fatalities database: analysis of volcanic threat with distance and victim classification. J Appl. Volcanol. 6, 15 (2017). https://doi.org/10.1186/s13617-017-00..., CC BY 4.0.
[2] U.S. Geological Survey
[3] VEIs, dates/years, composition, tephra layer name, DRE estimates, and bulk tephra volume estimates for volcanic eruptions shown in this video which were assigned a VEI 4 or larger and are not Eyjafjallajökull's 2010 eruption or the Hunga Tonga-Hunga Ha'apai's 2022 eruption are sourced from the LaMEVE database (British Geological Survey © UKRI), https://www2.bgs.ac.uk/vogripa/view/c..., Used with Permission
[4] Source of Volcanic Explosivity Index (VEI) methodology and criteria: Newhall, C. G., and Self, S. (1982), The volcanic explosivity index (VEI) an estimate of explosive magnitude for historical volcanism, J. Geophys. Res., 87(C2), 1231–1238, doi:10.1029/JC087iC02p01231. Accessed / Read by / geologyhub on Oct 5th, 2022.
[4] CENAPRED
[5] Phivolcs
0:00 El Chichon Update
0:13 1982 Eruption
0:59 Increased Earthquakes
2:22 Geologist Interpretation
4:14 An Unlikely Hypothetical
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