3. Global Seismograph Network - GSN:

DATES OF OPERATION:	22 Aug 2000 to 8 Dec 2007.

SEISMOMETER TYPE AND ADC:
Teledyne Geotech 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.
Guralp Systems model CMG-3T 3-component seismometer for short-period channels 
continuously recorded at 40 sps.
Kinemetrics FBA-23 3-component force balance accelerometer recorded at 1 sps continuous
mode and at 100 sps triggered mode.
The data acquisition system is IDA MK7.

CALIBRATION EPOCHS:	2000,235 - 2007,342 
                            
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.

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