G19K (AEC-AON)

Station Notes

ADOPTED BY AEC
Sand used down borehole was noticeably damp
Both Americas and AsiaPacific satellites are low on the horizon and near other terrain

Service Plan

Site Access

Helicopter

Site Contact

No site contact

Site Visits

2021_05_18 Service (R. Bierma, K Schroeder)
USArray Station Service Report
Form V1.0

STATION CODE:
AK.G19K

STATION Locale Description:
Purcell Mountains, Alaska

STATION SERVICE LOG DATE:
20210518

STATION/SENSOR DOWN TIME (UTC):
2020-2028

SERVICE DESCRIPTION:
AON upgrades

UPON ARRIVAL:
Station was in good condition. No animal damage was observed.
A pair of wine-colored smears on the side wall indicate where a bear either placed its blueberry juice saturated drooling snout or a set of berry-stained paws.

ACTIONS TAKEN:
Baler media swap
BGAN antenna cable swapped
The soil temperature sensor equipment and data loggers were removed
EQUIPMENT REMOVED:
n/a

EQUIPMENT INSTALLED:

n/a

COMMENTS:

BGAN was connected Narrow at 66.6 sig str.
One of the lost stuff sacks (reference Service Report 20191111) was found 150', completely shredded with white polyester fluff scattered around the bag in a pillowy blast radius.
Door taped prior to departure

VISITOR:
R. Bierma
K. Schroeder
J. Elsass

ON NEXT VISIT:
n/a

CHANGES AFFECT INSTRUMENT RESPONSE:
None
2020_09_22 Removal (Adopted by AEC)
USArray Station Removal Report
Form V1.5

STATION CODE: TA.G19K

STATION LOCALE DESCRIPTION: Purcell Mountains, AK, USA

STATION REMOVAL LOG DATE: 20200922

STATION/SENSOR DOWN TIME (UTC): N/A
REMOVAL DESCRIPTION: Site was adopted by AEC and has not been removed.
ACTIONS TAKEN: Site was not visited during the adoption process.
LAT/LONG OF SENSOR HOLE: N/A

Top of Casing to hole bottom (indicate if sand present or evacuated): N/A
Bottom of wellcap to grade level: N/A
SENSOR ORIENTATION MEASUREMENTS:
Measured with Octans Unit: N/A
Measured with rods on pin: N/A
Casing/wellcap marked with reference orientation: N/A
SENSOR ORIENTATION: N/A
COMMENTS:
BGAN site, remote acquisition changeover to AK network.
REMOVED: N/A
DAMAGE: N/A
LEFT AT SITE: N/A
VISITORS:
Nate Murphy
NEXT VISIT: N/A
SITE STATUS: N/A
HOLE STATUS: N/A
2019_11_11 Service (R. Bierma, J. Soderquist)
STATION CODE:
TA.G19K
STATION Locale Description:
Purcell Mountains, AK, USA
STATION SERVICE LOG DATE:
20191111
STATION/SENSOR DOWN TIME (UTC):
Sensor was down when we arrived. Sensor resurrected approximately 2145 UTC
crew onsite from 2010-2300 UTC
SERVICE DESCRIPTION:
Replace sensor and cable
Multiple firmware upgrades
Swap baler media

UPON ARRIVAL:
Half of the wellcap lid had been torn off. The sensor cable had been evicerated from the wellcap box and severed completely by a bear (or Enukins). The stuff sacks were yanked out and only 1 was accounted for down the hill. The borehole had about 12" of standing water above the sensor.
ACTIONS TAKEN:
STS5A sensor was removed from the borehole; this required two people using an orienting rod to lift and break suction, although it didn't take much force. Because the sensor cable was severed, there was no way to lock the STS5A prior to removal from the borehole; the first action with the old sensor was to connect the new sensor cable and issue a Remove command. We decided that since the sensor had been moved without being locked and had also been submerged by water in the borehole, we needed to replace both the sensor and cable.
The water was bailed out of the hole, paper towels were used to attempt to sponge some of the water, and 0.5L of dry sand poured for the base. It leveled off nicely and actually felt pretty stable and compacted. However it should be noted that the base is still water-logged sand, we didn't have sufficient sand to dig everything out and replace it. The new STS5A sensor was lowered down hole and bedded in place with 2.2L of dry sand.
XI202 firmware was updated to 4286
GCC firmware was updated to 1.20
The infrasound hose was not connected to the VIE when we arrived, so it was attached.
Baler media was swapped.

EQUIPMENT REMOVED:
STS5A sensor, bc: 5015459, sn: 130781

EQUIPMENT INSTALLED:
STS5A sensor, bc: 5015543, sn: 130803

COMMENTS:
Top of sensor was 76". Stuff sacks were pushed to 62", 27", and grade. A replacement wellcap lid was installed.
Sensor orientation measured at 0.00 with OCTANS (using NMEA display)
Data flow confirmed with Installer Command prior to departure
All the infrastructure on the Hut Antenna Mount and inside the hut was in good condition
Door was taped prior to departure.

VISITOR:
Ryan Bierma
John Soderquist
Andy Wallace (Alpine Air Alaska)
ON NEXT VISIT:
n/a
CHANGES AFFECT INSTRUMENT RESPONSE:
Yes, new sensor and cable.
2017_06_14 Install (J. Miner, K. Aderhold, D. Bloomquist)