Date: Thu, 21 May 1998 08:03:26 -0500 To: debbie@iris.washington.edu From: cj brewster Subject: FDSN update (GUMO) Cc: gsnmaint@asl.cr.usgs.gov To whom it may concern, Following information is submitted for update to the GUMO FDSN information. Notes: 1. The KS36000 seismometer was replaced with a KS54000 seismometer in Jan 1993. 2. The Martin Marietta ADC was replaced with a Quanterra Q-680 ADC in Nov 1997. 3. The Guralp CMG-3T seismometer was install in Nov 1997. **************************************************************************** **************************** GUMO - Guam, Mariana Islands (photo) Information for GUMO as of May 1998 Station: Guam, Mariana Islands Director: Dr. A.W. Green Network Affiliation: IRIS/USGS - GSN Address: Guam Observatory U.S. Geological Survey Box 8001, MOU #3 Agana, Guam 96910 Network Contact: Albuquerque Seismic Laboratory Building 10002 Kirtland AFB East Albuquerque, NM 87115 Telephone: 671 355 5259 Open Station: Yes Phone No. 671-637-4647 Fax: 671 637 8286 Parent Organization: U.S. Geological Survey Email: paul@kuentos.guam.net Coordinates: Latitude: 13.5878N Longitude: 144.8663E Elevation to Sensor: 14 Depth to Sensor: 100 Geology: Barrigada limestone believed to be about 250 meters thick underlain by basalts and volcanic congolmerates. Vault Conditions: Borehole. The strong motion system for the HL_ and LL_ channels is located in the recording building about 20 meters distant from the borehole. The sensors are on the concrete floor inside the data processing cabinet. The very short period sensor is located on an old concrete pier approximately 42.9 meters from the borehole. Site Description: N/A Addresses from which to obtain data. Station Instrumentation 1. Global Seismograph Network - GSN: IRIS-2 System [IU] 08 Jul 1991 to present 2. Seismic Research Observatory - SRO: [ SR ] 22 Nov 1988 to 01 Jul 1991 3. Seismic Research Observatory - SRO: [ SR ] 11 Apr 1985 to 21 Nov 1988 4. Seismic Research Observatory - SRO: [ SR ] 16 Jun 1975 to 11 Apr 1985 **************************************************************************** ******************************** GUMO - STATION INSTRUMENTATION 1. Global Seismograph Network - GSN: IRIS -2 System DATES OF OPERATION: ???? to Present. SEISMOMETER TYPE AND ADC: Teledyne/geotech Model KS-54000 borehole seismometer. Guralp CMG-3T short period seismometer for channels HHZ, HHN, HHE, SHZ, SHN, and SHE. Kinemetrics FBA-23 Low-Gain sensor for HLZ, HLN, HLE, LLZ, LLN and LLE components. ADC 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. 24-bit integer data words for very short period event triggered data (80 sps) and continuous very short period (40 sps) data. EVENT DETECTOR ALGORITHM: The Murdock event detector (Murdock, 1991) is used for the EL_ components. 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 detailed description of the IRIS-2 system can be found in Peterson et al (1989). **************************************************************************** ***************************** GUMO Channel Data These nominal values may significantly vary from the true sensitivity of the particular instrument installed at the site. Please refer to the appropriate dataless SEED volume for the current sensitivity or possible changes in sensitivity over time. Channel Data: Channel Sampling Rate Sensitivities BCI 20.000 sps event triggered 419430 C/V @ 0.02 Hz BHE 20.000 sps continuous 1.000 x 10^9 C/m/s @ 0.02 Hz BHN 20.000 sps continuous 1.000 x 10^9 C/m/s @ 0.02 Hz BHZ 20.000 sps continuous 1.000 x 10^9 C/m/s @ 0.02 Hz HHE 80.000 sps event triggered 8.3886 x 10^9 C/m/s @5 Hz HHN 80.000 sps event triggered 8.3886 x 10^9 C/m/s @5 Hz HHZ 80.000 sps event triggered 8.3886 x 10^9 C/m/s @5 Hz HLE 80.000 sps event triggered 53687 C/m/s^2 @ 1 Hz HLN 80.000 sps event triggered 53687 C/m/s^2 @ 1 Hz HLZ 80.000 sps event triggered 53687 C/m/s^2 @ 1 Hz LHE 1.000 sps continuous 4.000 x 10^9 C/m/s @ 0.02 Hz LHN 1.000 sps continuous 4.000 x 10^9 C/m/s @ 0.02 Hz LHZ 1.000 sps continuous 4.000 x 10^9 C/m/s @ 0.02 Hz LLE 1.000 sps continuous 53687 C/m/s^2 @ 1 Hz LLN 1.000 sps continuous 53687 C/m/s^2 @ 1 Hz LLZ 1.000 sps continuous 53687 C/m/s^2 @ 1 Hz SCI 40.000 sps event triggered 419430 C/V @ 0.02 Hz SHE 40.000 sps continuous 8.3886 x 10^9 C/m/s @ 5 Hz SHN 40.000 sps continuous 8.3886 x 10^9 C/m/s @ 5 Hz SHZ 40.000 sps continuous 8.3886 x 10^9 C/m/s @ 5 Hz UHE .010 sps continuous 4.510 x 10^9 C/m/s @ 0.003 Hz UHN .010 sps continuous 4.510 x 10^9 C/m/s @ 0.003 Hz UHZ .010 sps continuous 4.510 x 10^9 C/m/s @ 0.003 Hz VHE .100 sps continuous 1 .600 x 10^10 C/m/s @ 0.02 Hz VHN .100 sps continuous 1.600 x 10^10 C/m/s @ 0.02 Hz VHZ .100 sps continuous 1.600 x 10^10 C/m/s @ 0.02 Hz For prompt response or technical assistance please send messages to: gsnmaint@asl.cr.usgs.gov Thank You C.J. Brewster **************************************************************** Albuquerque Seismological Laboratory U. S. Geological Survey Bldg 10002, Kirtland AFB-East Albuquerque, New Mexico 87115-5000 Voice: (505) 846-5646 Fax: (505) 846-6973 Email: gsnmaint@asl.cr.usgs.gov Web: http://aslwww.cr.usgs.gov ****************************************************************