1. Global Seismograph Network - GSN:

DATES OF OPERATION:	11 Jun 1995 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 triaxial
seismometer for triggered short period channels.  IDA MK7 data acquisition
system.

CALIBRATION EPOCHS:	1995, 162 to Present

DIGITAL FORMAT:
32 bit integer data words for broadband (20 sps), long period (1 sps), very
long period (0.1 sps) and short period (40 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