I've read that there is a strong correlation between the timing of earthquakes and the volume of gasses like hydrogen and methane leaking out of the earth. The volume of gas can change very significantly before and after an earthquake. There is newfound attention on this topic because there is a race to discover and harvest natural geologic hydrogen (look up latest news about "natural hydrogen").I found this research pretty mind blowing and took these notes to highlight this topic.
Underground “Natural Hydrogen”: Notes on Research Review Paper by Viacheslav Zgonnik - https://docs.google.com/document/d/1ucnE0B_WQA4zo8tTTsZyBu0i...
syllablehq|2 years ago
Hydrogen is associated with Earthquakes and can maybe even predict them!
In areas with recent tectonic activity: “Higher hydrogen concentrations were observed,” and “hydrogen gas was observed in ground water.” [pg 20]
“[Correlated with earthquakes,] hydrogen concentrations measured at continuous monitoring sites show abrupt changes in concentration over several orders of magnitude, up to 10 times, in a short period of time.” [pg 40]
“Indeed, at epicenters of large earthquakes a reduction in the ozone layer above them has been observed.” [pg 40]
“A systematic study of hydrogen in aquifers shows that H2 concentrations are in- versely correlated with the age of the area's last tectonic activity.” [pg 41]
“Another study shows that hydrogen concentrations in earthquake-associated faults are usually much higher than concentrations in non-earthquake faults.” [pg 41]
‘During earthquakes hydrogen concentrations in fault zones have been shown to increase by several orders of magnitude.” [pg 41]
“Numerous articles discuss hydrogen as a good earthquake indicator and the possibility of monitoring hydrogen for the prediction of seismic events.” [pg 41] More detail below