2. Global Seismograph Network - GSN:

DATES OF OPERATION:	21 May 1990 to 21 Mar 1994.

SEISMOMETER TYPE AND DATA ACQUISITION SYSTEM:
Streckeisen Model STS-1/VBB 3 component system for broadband, long period, 
and very long period channels recorded at 20, 1 and 0.1 sps respectively.
        Note: Horizontal STS-1 sensors are aligned N,E since Feb 21, 1995.
Kinemetrics FBA-23 three-component force balance accelerometer recorded at
1 sps continuous mode and at 100 sps triggered mode.  IDA MK6 data 
acquisition system. 

CALIBRATION EPOCHS:	1990, 141 - 1994, 080

DIGITAL FORMAT:
32 bit integer data words for all broadband (20 sps) and very long period
(0.1 sps) data and for synthesized long period (1 sps) data. 16 bit integer
data words for extremely short period (100 sps) triggered channels.  

Click on any of the following items for further information.

• Channel Data
• Amplitude Response to Ground Velocity
• Seismic Noise Study graph information
  • Seismic Noise Level - Annual
  • Seismic Noise Level - Seasonal/Diurnal