Pictures of Equipment
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The K2 Strong Motion Accelerograph
The K2 datalogger with force balanced accelerometers, the seismometer, and
communications equipment that are typically used:
The K2 as it would be set up at an actual digital site. The metal frame is
used to keep things from bumping up against the seismometer while it is in
operation. The K2 is crooked in its frame for a specific reason. It must
be aligned in a northerly direction so that the North-South and East-West
ground motions are indeed what are sensed by the device.
A closer view of the internals of the K2 accelerograph. The metal bar in
the lower lefthand corner of the case is the battery holder. The three
ground motion sensors (for vertical, N-S, and E-W motions) are in the top
lefthand corner of the device, covered by a protective grille. The data
conversion/storage/communications hardware is in the right half of the
device. The orange rectangular object to the left is the rechargable
battery which powers the K2 during power shortages.
The Central Site Data Acquisition System
This is a picture of the central site data acquisition system. The tower
contains the actual data receiving hardware, as well as a computer and
data storage system. The large terminal on the table allows system
administrators to modify and maintain the system.
An Example of a TriNet Station
This is a photo of a digital seismic station. It uses a Quanterra
digital datalogger. The two cylindrical objects on the floor
are the broadband sensor and the strong motion accelerograph by which the
datalogger records ground motions.