3. Seismic Research Observatory - SRO:   [ SR ] 

DATES OF OPERATION:  07 Apr 1976 to 02 Jul 1992

SEISMOMETER TYPE:
Teledyne-Geotech Model KS-36000 borehole seismometer.    

DIGITAL FORMAT:
16 bit gain-ranged data words for all components.  Range: +2,096,128 
to -2,097,152 counts.

EVENT DETECTOR ALGORITHIM:
The Murdock event detector (Murdock, 1983) was installed on 03 May 1983.  Prior
to that time a detector developed by the  Unitech Corp., Austin, Texas was used,
which is not documented.

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 complete description of the SRO system can be found in Peterson et al. (1976).
On 10 Jun 1989 the short-period channel was switched from the low gain
to the high gain seismometer port which changes the transfer function.
All data supplied either through IRIS or the USGS will include the correct 
transfer functions.