1. Global Seismograph Network - GSN:

DATES OF OPERATION:	01 Dec 1992 to Present.

SEISMOMETER TYPE AND DATA ACQUISITION SYSTEM:
Streckeisen Model STS-1/VBB 3 component system for broadband, long period and
very long period channels and Teledyne Geotech Model GS-13 seismometers for 
triggered short period channels.  IDA MK6 data acquisition system. 

CALIBRATION EPOCHS:	1992, 336 - Present

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 
short period (200 sps) triggered data.  

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