1. Global Seismograph Network - GSN:

DATES OF OPERATION:	10 Mar 1999 to Present. 

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

CALIBRATION EPOCHS:	1999, 069 - Present

DIGITAL FORMAT:
32 bit integer data words for all broadband (20 sps) and very long period
(0.1 sps) data and for synthesized long period (1 sps) data.  16 bit integer
data words for short period (200 sps) triggered data.

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