1. Global Seismograph Network - GSN:

DATES OF OPERATION:	30 Jan 1999 to Present. 

SEISMOMETER TYPE AND ADC:
Streckeisen model STS-1/VBB, 3 component system for broadband, long period,
and very long period channels.  Teledyne Brown model GS-13 seismometers for
triggered short period channels.  IDA MK7 data acquisition system.

CALIBRATION EPOCHS:	1999, 030 - 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 (200 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