Bering site visits July 7-8

Laura LeBlanc and Martin Truffer flew to the Bering Glacier sites on July 7-8, 2007, with ERA Helicopters pilot Jan Gunderson. The main purpose of the trip was to replace the L22 seismometers with borehole L22s. They ended up doing a lot of maintenance due to flooded instrument enclosures.
The good news is that the instruments recorded a lot of data, generally through late June when the snow all melted and either tipped over the seismometers or flooded the enclosures.
The GPS data indicate a horizontal velocity of 4.2 meters per day at the uppermost site.

CRAK GPS antenna after cutting down the tripod	Just before leaving CRAK	Station BMG July 8 2007. The L22 is under water.
BMG, after fixup. The borehole just to the left of the box is 5 meters deep with an L22.	Mt Stellar, with landslide activiity, July 8 2007	Station MILR, July 8 2007.
Station MILR, July 8 2007. The battery box is sitting on top of the L22 and the 6TD is underwater.	Station MILR, July 8 2007. The battery box is sitting on top of the L22 which is inside of the orange dry bay.	6TD, in a dry bag, which is completely filled with water.
MILR	Wet 6TD	L22 under battery box
Station MILR, July 8 2007.	MILR, happy lead acid batteries	MILR
Water inside of the trimble box, so this station must have flooded at some point. MILR	MILR, corrosion from being flooded	MILR, after fixup. Borehole is just in front of the box, and is 5 meters deep with an L22.