Seismic Network Operations
IU PAB
San Pablo, Spain
IU PAB commences operations on: 1992,294
Host:  National Geographical Institute 

Latitude:  39.545 
Longitude:  4.35 
Elevation:  950 
Datalogger:  Q330 
Broadband:  STS1VBB_w/E300 
Accelerometer:  FBA_EST_EpiSensor_Accelerometer 
Telemetry Status at the NEIC:  Last Data In Less Than 10 Minutes 
Vault Condition: The seismometers are located in a tunnel approximately 60 feet from the entrance. The vault has concrete walls with an arched ceiling. Piers are isolated from the concrete floor and are attached to bedrock.
Site Geology: The rock is granite, and there are about 3 meters of overburden.
Location Code  Channel Code  Instrument  Flags  Sample Rate  Dip  Azimuth  Depth 

00  BH1  Streckeisen STS1VBB w/E300  CG  20.00  0.00  0.00  0.00 
00  BH2  Streckeisen STS1VBB w/E300  CG  20.00  0.00  90.00  0.00 
00  BHZ  Streckeisen STS1VBB w/E300  CG  20.00  90.00  0.00  0.00 
00  LH1  Streckeisen STS1VBB w/E300  CG  1.00  0.00  0.00  0.00 
00  LH2  Streckeisen STS1VBB w/E300  CG  1.00  0.00  90.00  0.00 
00  LHZ  Streckeisen STS1VBB w/E300  CG  1.00  90.00  0.00  0.00 
00  VH1  Streckeisen STS1VBB w/E300  CG  0.10  0.00  0.00  0.00 
00  VH2  Streckeisen STS1VBB w/E300  CG  0.10  0.00  90.00  0.00 
00  VHZ  Streckeisen STS1VBB w/E300  CG  0.10  90.00  0.00  0.00 
10  BH1  Streckeisen STS2 Highgain  CG  40.00  0.00  0.00  0.00 
10  BH2  Streckeisen STS2 Highgain  CG  40.00  0.00  90.00  0.00 
10  BHZ  Streckeisen STS2 Highgain  CG  40.00  90.00  0.00  0.00 
10  HH1  Streckeisen STS2 Highgain  TG  100.00  0.00  0.00  0.00 
10  HH2  Streckeisen STS2 Highgain  TG  100.00  0.00  90.00  0.00 
10  HHZ  Streckeisen STS2 Highgain  TG  100.00  90.00  0.00  0.00 
10  LH1  Streckeisen STS2 Highgain  CG  1.00  0.00  0.00  0.00 
10  LH2  Streckeisen STS2 Highgain  CG  1.00  0.00  90.00  0.00 
10  LHZ  Streckeisen STS2 Highgain  CG  1.00  90.00  0.00  0.00 
10  VH1  Streckeisen STS2 Highgain  CG  0.10  0.00  0.00  0.00 
10  VH2  Streckeisen STS2 Highgain  CG  0.10  0.00  90.00  0.00 
10  VHZ  Streckeisen STS2 Highgain  CG  0.10  90.00  0.00  0.00 
10  VMU  Streckeisen STS2 Standardgain  CH  0.10  0.00  0.00  1.00 
10  VMV  Streckeisen STS2 Standardgain  CH  0.10  0.00  0.00  1.00 
10  VMW  Streckeisen STS2 Standardgain  CH  0.10  0.00  0.00  1.00 
20  HN1  Kinemetrics FBA EST EpiSensor Accelerometer  TG  100.00  0.00  0.00  0.00 
20  HN2  Kinemetrics FBA EST EpiSensor Accelerometer  TG  100.00  0.00  90.00  0.00 
20  HNZ  Kinemetrics FBA EST EpiSensor Accelerometer  TG  100.00  90.00  0.00  0.00 
20  LN1  Kinemetrics FBA EST EpiSensor Accelerometer  CG  1.00  0.00  0.00  0.00 
20  LN2  Kinemetrics FBA EST EpiSensor Accelerometer  CG  1.00  0.00  90.00  0.00 
20  LNZ  Kinemetrics FBA EST EpiSensor Accelerometer  CG  1.00  90.00  0.00  0.00 
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Availability, Since 1972
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As part of the annual calibration process, the USGS runs a sequence that includes a random, a step, and several sine wave calibrations. Â The USGS analyzes the random binary calibration signal in order to estimate the instrument response. Â The figures below show the results from the analysis of the most recent processed calibration at the station.
We use an iterative threestep method to estimate instrument response parameters (poles, zeros, sensitivity and gain) and their associated errors using random calibration signals. First, we solve a coarse nonlinear inverse problem using a least squares grid search to yield a first approximation to the solution. This approach reduces the likelihood of poorly estimated parameters (a localminimum solution) caused by noise in the calibration records and enhances algorithm convergence. Second, we iteratively solve a nonlinear parameter estimation problem to obtain the least squares bestfit Laplace pole/zero/gain model. Third, by applying the central limit theorem we estimate the errors in this pole/zero model by solving the inverse problem at each frequency in a 2/3rdsoctave band centered at each bestfit pole/zero frequency. This procedure yields error estimates of the 99% confidence interval.
Loc  Chan  Cal Date  EpochSpan  Grade  Amp Nominal Error (dB)  Amp Best Fit Error (dB)  Phase Nominal Error (degree)  Phase Best Fit Error (degree)  Sensor  Cal Type 

00  BH1  2013:122  2012:034 to No Ending Time  A  0.064413  0.021805  0.26529  0.3035  STS1VBBE3  Random 
00  BHZ  2013:122  2012:034 to No Ending Time  A  0.019672  0.010567  0.14497  0.20716  STS1VBBE3  Random 
00  BH2  2013:122  2012:034 to No Ending Time  A  0.020964  0.014362  0.15306  0.10333  STS1VBBE3  Random 
10  BHZ  2013:123  2011:239 to No Ending Time  A  0.014863  0.014456  0.10067  0.097384  STS2HG  Random 

Current IssuesThe ?H2 component is showing LP pulsing.

20090821Upgraded to Q330 digitizer.