On 9/24/2011 10:56 PM, Richard Clark wrote:
On Sun, 25 Sep 2011 14:09:25 +1000, "Eric R
wrote:

Be very interesting if results are confirmed

The simple questions being asked (dirt being dirt and the tidal bulge
being triple the distance the neutrinos sped up) would seem to bury
that possibility.

73's
Richard Clark, KB7QHC

I think one can safely assume that the folks doing the experiment are
aware of all those potential error sources.

http://arxiv.org/abs/1109.4897 has most of the details

For instance:
"The distance between the target focal point and the OPERA reference
frame was precisely measured in 2010 following a dedicated geodesy
campaign."

the distance is 730534.61 +/- 0.20 meters, by the way.

"The high-accuracy time-transfer GPS receiver allows to continuously
monitor tiny movements of the Earth’s crust, such as continental drift
that shows up as a smooth variation of less than 1 cm/year, and the
detection of slightly larger effects due to earthquakes. The April
2009 earthquake in the region of LNGS, in particular, produced a sudden
displacement of about 7 cm, as seen in Fig. 7. All mentioned effects are
within the accuracy of the baseline determination. Tidal effects are
negligible as well."