[IGSMAIL-6366] small earthquake displacement at CONZ

[Jim.Ray]

FYI, the CONZ station operators have confirmed that an
observed position shift there on about 2011-02-12 of
about -16 mm in N and about +14 mm in E was most likely
caused by a M6.9 earthquake at 17:00 local time located
about 50 km from Concepcion, Chile.  Any height change
was no more than a few mm.  This displacement is of
course in addition to any longer-term post-seismic
motions due to last year's major earthquake.

Uwe Hessels notes that "If somebody wants to have a more
detailed look on it, the 1sec data are available on the
BKG IGS server in Frankfurt (igs/highrate-permanent)."

--Jim Ray