Seismometer Type: 
Streckheisen Model STS-2 Hi gain VBB Triaxial components nominal 20000, Volt secounds/Meter sensitivity.  ADC is Quanterra Model Q-680.
Digital Format:
 24 bit integer data words for all broadband long period very long period and, ultra long period channels.  Range 8388607 to -8388608 counts, 16 bit integer data words for mass position and all environmental channels., Range  32767 to -32768
Event Detector Algorithm:
 The Murdock event detector (Murdock 1991) is used for the event detected compon, ents.
      Additional Information:
 A detailed description of the IRIS-2 system  can be found in Peterson, et al (1989).