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. Streckeisen Model STS-2 triaxial seismometer
for short period channels recorded at 40 sps continuous mode (channel
designator eh*). A Guralp Systems model CMG-3T 3-component seismometer
for short-period channels continuously recorded at 40 sps (channel 
designator sh*) was operated from 15 Dec. 1996 to 3 Mar. 2002. 
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.

• Amplitude Response to Ground Velocity
• Seismic Noise Study graph information
  • Seismic Noise Level - Annual
  • Seismic Noise Level - Seasonal/Diurnal
• Channel Data