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12-20-2016, 12:53 PM
Marc,
Yes, I saw the M7 normal quake...was that central America? But it came a few days after a similar size normal quake in the subduction zone offshore Honshu, in the rupture area of the 2011 M9 quake. I recall I sent an email to earth scientist Leonardo "Nano" Seeber and others, and Nano thought it was interesting that this was not a stretching quake in the slab, but instead was above the slab (maybe above the megathrust?).
The thrust quakes in SW and the normal one in Central America (?) are not cause and effect: the plates don't change velocity on this time scale. It is not how quakes work. The plates are always moving the same way, but the faults are locked, and they flex and eventually rupture.
Chris
Yes, I saw the M7 normal quake...was that central America? But it came a few days after a similar size normal quake in the subduction zone offshore Honshu, in the rupture area of the 2011 M9 quake. I recall I sent an email to earth scientist Leonardo "Nano" Seeber and others, and Nano thought it was interesting that this was not a stretching quake in the slab, but instead was above the slab (maybe above the megathrust?).
The thrust quakes in SW and the normal one in Central America (?) are not cause and effect: the plates don't change velocity on this time scale. It is not how quakes work. The plates are always moving the same way, but the faults are locked, and they flex and eventually rupture.
Chris