1. Global Seismograph Network - GSN: IRIS -2 System
DATES OF OPERATION: 21 Jan 2004 to Present.
SEISMOMETER TYPE AND ADC:
Streckeisen STS-1 vertical seismometer for broad-band vertical channels (00
location code).
Streckeisen STS-2 (low-gain) seismometer for for higher sample rate broad-band
channels (10 location codes). ADC is a Quanterra Q-680, 12 channel.
DIGITAL FORMAT:
24 bit integer data words for all broad-band (20 sps), long period (1 sps),
very long period (0.1 sps), and ultra long period (0.01) channels. Range:
+8,388,607 to -8,388,608 counts.
EVENT DETECTOR ALGORITHM:
The Murdock/Hutt event detector (Murdock, 1991) is used for the HH? channels.