1. Global Seismograph Network - GSN:

DATES OF OPERATION:     23 May 1997  to Present.

SEISMOMETER TYPE AND ADC:
Teledyne Brown Model KS-54000.  A borehole three component system for 
broadband long period, and very long period channels recorded at 20 sps, 
1 sps, and 0.1 sps respectively. Guralp Systems model CMG-3T 3-component 
seismometer for short-period channels continuously recorded at 40 samples 
per second (channel designator sh*). Streckeisen Model STS-2 triaxial 
seismometer for short period channels recorded at 40 sps continuous mode 
(channel designator eh*). IDA MK7 data acquisition system.

CALIBRATION EPOCHS:	1997, 143 - Present

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