Guralp CMG-3ESP placed on a cemented tile at the bottom of the hole. Depth is slightly more than a meter. No bedrock here, just a lot of cobbles. Filling in the hole. Setting up the DAS in the observtory with the Palmtop.
Wires go though hole in bottom of window frame to sensor, solar panels, and GPS clock.
Guo Biao doing the honors. The setup of the recording system in the observatory, looking to the east with morning sun streaming in. Sensor is located just outside and to the left. The observatory, looking west. The sensor is located in the right front corner within the walls.