[Strategerist]

Actually there's no info that any PEOPLE "felt" the Sumatran quake in Oklahoma.

Seismometers in Oklahoma, as they did all over the world, EASILY felt the Sumatran earthquake. Thing is this is routine.

You can build your own seismometer for a few hundred dollars that will easily pick up earthquakes all over the world, including ones much weaker than the Sumatran quake.

I haven't seen any reports of any change in activity or new eruptions of volcanoes near the Sumatran quake.

[Prophet in the wilderness]

Well,, before I start,,I am not a Scientist, or have a PHD. So, from what I can see, this large earthquake " Could have " affected all of the earths tectonic plates throughout the world , kind of like broken patches of ice in a pond or lake.
Were is, in one area, ( SUMATRAN QUAKE ) relieved or put more pressure on those tectonic plates in that area, so, on the far sides of those plates, pressure was either relieved or more pressure was put upon it.
In common sense, expect more earthquakes in the next few weeks on the far sides of the tectonic plates that were affected.