1. Global Seismograph Network - GSN:  IRIS-2 System  [ IU ]

DATES OF OPERATION:  	28 Jun 1991 to Present.

SEISMOMETER TYPE:
Streckeisen Model STS-1 VBB 3 component system.  ADC is Martin Marietta EDME.

DIGITAL FORMAT:
24 bit integer data words for all components.   Range: +8,388,607 to -8,388,608.

EVENT DETECTOR ALGORITHM:  None

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

COMMENTS:
A description of the IRIS-2 system can be found in USGS Open-File Report 89-471, Peterson et al (1989).