nonvolcanic tremor

Once again it is time to acknowledge that I will never read all of the papers I've flagged in my RSS reader... but I can at least go through the abstracts. While my summaries here may be slightly in error due to the fact that I haven't actually read the papers in question, here is what I'm skimming: Clay might trigger earthquakes - Many clay minerals break down, when heated, to produce H2O + different clay minerals. If this water is produced inside a clay-lined fault zone, and not allowed to leave, it might weaken the fault enough to produce an earthquake (cf. the beer can experiment).…