1. Global Seismograph Network - GSN:

DATES OF OPERATION:	18 Feb 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 & Teledyne Geotech Model GS-13 seismometers 
for triggered short period channels.  IDA MK7 data acquisition system.   

CALIBRATION EPOCHS:	1999, 049 - 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