1. Global Seismograph Network - GSN:

DATES OF OPERATION:	15 Feb 1995 to Present.

SEISMOMETER TYPE AND ADC:
Teledyne Brown model KS-54000 borehole 3 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
short period channels recorded at 100 sps triggered mode from 1994, 212 to
1995, 040, and at 40 sps continuous mode from 1995,046 to the present.
IDA MK7 data acquisition system.   

CALIBRATION EPOCHS:	1995, 046 - Present

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