1. Global Seismograph Network - GSN:

DATES OF OPERATION:	16 Jun 1995 to Present.

SEISMOMETER TYPE AND DATA AQUISITION 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: 	1995, 167 - Present

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