Pacific Northwest Geodetic Array
Central Washington University

Photograhic gallery

Pacific Northwest Tiltmeters

Photographs from the biaixal tiltmeter near Olympia at the Shelton airport.


Corner vault with
mounts and end caps for both tiltmeter arms.

Mounting electronics & float reservoirs.

Working tiltmeter with voltage meter.

Close up view of solar panels.

Driving steel monument piles 30ft deep with pneumatic hammer.

Looking across the east-west arm of a 500 meter tiltmeter.

Radio telemetry links to computer. Data saved every five mins, for each of the six recording instruments

Complete corner vault
with solar and telemetry packages, Note yellow building in upper left corner where the data is archived.

Each manhole is
capped with a rebar
reinforced concrete cap.

Surface view of vault entry.