1. Global Seismograph Network - GSN:

DATES OF OPERATION:	03 Jan 1970 to Present.

SEISMOMETER TYPE AND ADC:
Teledyne Brown Model KS54000 borehole 3 component system for broadband, long
period, very long period channels and Streckeisen model STS-2/VBB, 3 component
system for triggerd short period channels.  IDA MK7 data acquisition system. 

CALIBRATION EPOCH:	1997, 069 - Present

DIGITAL FORMAT:
32 bit integer data words for broadband (20 sps), long period (1 sps), very
long period (0.1 sps) channels.  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