1. Global Seismograph Network - GSN: 

DATES OF OPERATION:     14 Jun 1996 to Present.

SEISMOMETER TYPE AND ADC:
Streckeisen STS-2 very broad band seismometer, Geotech KS-54000 borehole 
seismometer and Kinemetrics FBA-23 low-gain accelerometer.  ADC is Quanterra
QX80.
	Note:  The Geotech 54000 has a non-standard orientation.

DIGITAL FORMAT:
24 bit integer data words for all broadband, long period, very long period and
ultra long period channels.  Range: +8,388,607 to -8,388,608 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.

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/Diurn al