Monday, August 4, 2014

Indo-Australian Plate Action

The mid-ocean ridges of the Indian ocean continue to drive the Indian and Australian plates north and north east and that continues to cause issues - aka: earthquakes - all along the convergent boundaries those plates "share" with the Asian and Pacific plates.  A 6.1 quake yesterday at the northeast corner of the Indian plate in southern China caused well over 100 deaths, thousands of injuries and destroyed tens of thousands of buildings.  Over the last week, quakes of magnitudes just below that follow all along that Indo-Asian boundary and the shaking continued with lots of 4 and 5 magnitude quakes following the island arcs created by the subduction of the northern edge of the Aussie plate with the basalt of the Pacific sea floor.  Just a guess...but that is likely to continue...for the next 10 to 50 or 100 million years.
Across the Pacific, central and northern South America were shifting and shaking pretty good over the last 7 days.  A 6.3 quake in southern Mexico in late August leads the list but the quakes continued down the isthmus that is central America and all the way down to Peru along the western edge of South America.
The US was mostly quiet this week; small quakes in California, Alaska and fracking quakes in Oklahoma were about it.  Central Va. has been still since the 2.1 shake the last Friday in August and as we approach the 3rd anniversary of the quake that changed thinking along the east coast those of us in the shaky zone would like to see it stay that way.  If wishes were horses...  We know that quiet is not something the earth is likely to be, for at least another billion years or so, get out and enjoy what ever the planet throws your way, today on Earth.

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