1. Global Seismograph Network - GSN:

DATES OF OPERATION:	31 Jul 1999 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:	1999, 212 - Present

DIGITAL FORMAT:
32 bit integer words for all broadband (20 sps) and very long period (0.1 sps)
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