North Baja Transect

Summary

Introduction

The North Baja Transect (NBT) stations, a collaborative effort by el Centro de Investigación Científica y de Educación Superior de Ensenada in México, San Diego State University, the Southern California Earthquake Center, the University of California, San Diego, and the University of Nevada at Reno, ran from October 1997 through June 1998. Nine of the 11 temporary three-component broadband stations used Guralp CMG40T seismometers, with response flat to velocity in the band 0.03-16 Hz. Stations SAFE and PUPE used Guralp CMG3ESP seismometers, with response flat to velocity in the 0.01-16 Hz (SAFE) and 0.03-16 Hz (PUPE) bands. Each station was equipped with a 24-bit digitizer recording at 40 samples per second. To investigate the relation between Moho depth and topography, the stations were positioned in northern Baja California, México, south of the Transpeninsular Strike-slip Province with 15-km spacing along an approximate east-west transect at 31°N. Six of the stations traversed the Stable Central Peninsula, where elevations range from nearly sea level at the Pacific coast to just under 3 km at the axis of the Peninsular Ranges. The other five stations were located east of the Sierra San Pedro Mártir fault in the Gulf Extensional Province, which included one station on the island of Roca Consag in the Gulf of California and one on the mainland México side of the Gulf at Puerto Peñasco. Most stations ran for about a 6-month period, with the exception of the island instrument, ROKO, which recorded for about a month before being disabled by sea lions. Despite the high noise level at this station, a few teleseismic events were recorded during its brief life span. Over the deployment period, the remaining stations recorded 15 large teleseismic events in the epicentral distance range 30° < Δ < 100°, 11 of which were Mw > 6.5, that were suitable for use in the analysis.

Station Map

Station map

Station List

(table version)

sta   ondate   offdate   lat   lon   elev   staname   statype   refsta   dnorth   deast   
ALAM   1997293   -1   30.986   -115.5665   2.396   El Alamito   ss   -   0   0   
BAR   1991001   -1   32.68   -116.6717   -0.001   -   -   -   0   0   
BAX   1991001   -1   28.9397   -113.557   0   -   -   -   0   0   
CBK   1991001   -1   32.8995   -116.2517   0.414   -   -   -   0   0   
CBX   1991001   -1   32.3132   -116.6637   1.25   -   -   -   0   0   
CCX   1991001   -1   31.8682   -116.664   -0   -   -   -   0   0   
CHX   1991001   -1   31.472   -115.0513   0.04   -   -   -   0   0   
COA   1991001   -1   32.8633   -115.1233   0.034   -   -   -   0   0   
COK   1991001   1998060   32.8495   -115.7278   -0.015   -   -   -   0   0   
COK   1998060   -1   32.8492   -115.7268   -0.015   -   -   -   0   0   
CPE   1991001   -1   32.88   -117.1   -0.001   -   -   -   0   0   
CPX   1991001   -1   32.4178   -115.304   0.18   -   -   -   0   0   
CRR   1991001   -1   32.8868   -115.9692   -0   -   -   -   0   0   
EAC   1991001   -1   31.8678   -116.6635   -0   -   -   -   0   0   
ECX   1991001   -1   31.657   -116.5978   1.04   -   -   -   0   0   
ELAR   1997298   -1   31.0789   -115.0916   0.54   El Arroyo   ss   -   0   0   
EMS   1991001   -1   32.7413   -114.9878   0.047   -   -   -   0   0   
EMX   1991001   -1   31.9882   -115.2417   0.01   -   -   -   0   0   
ENX   1991001   -1   31.8835   -116.6627   0.23   -   -   -   0   0   
ERP   1991001   -1   32.7432   -115.6635   -0.009   -   -   -   0   0   
ESR   1991001   -1   32.179   -114.9273   -0   -   -   -   0   0   
HGM   1991001   -1   32.6438   -115.4713   -0   -   -   -   0   0   
IKP   1991001   1998060   32.6488   -116.108   0.957   -   -   -   0   0   
IKP   1998060   -1   32.6502   -116.1095   0.957   -   -   -   0   0   
IWZ   1991001   -1   33.4653   -118.5513   0.122   -   -   -   0   0   
JUL   1991001   -1   33.0483   -116.6128   1.292   -   -   -   0   0   
LACB   1997296   -1   30.9628   -115.7968   0.672   Las Cabras   ss   -   0   0   
LCX   1991001   -1   31.8688   -116.6638   -0   -   -   -   0   0   
LIB   1991001   -1   29.91   -112.67   0   -   -   -   0   0   
LMX   1991001   -1   32.1088   -114.9627   0.025   -   -   -   0   0   
LOQI   1997290   -1   30.9517   -115.903   0.206   Los Quintos   ss   -   0   0   
OBTO   1997293   -1   31.0453   -115.4642   2.774   Observatorio   ss   -   0   0   
OLY   1991001   -1   33.4313   -117.1175   0.482   -   -   -   0   0   
PBX   1991001   -1   31.742   -116.7255   0.33   -   -   -   0   0   
PGX   1991001   -1   31.9583   -116.4427   -0   -   -   -   0   0   
PLT   1991001   -1   32.7312   -114.7293   0.061   -   -   -   0   0   
PPX   1991001   -1   31.3355   -113.633   0.015   -   -   -   0   0   
PUPE   1997301   -1   31.3353   -113.6325   0.096   Puerto Penasco   ss   -   0   0   
RDX   1991001   -1   31.9455   -115.9432   1.708   -   -   -   0   0   
ROKO   1997302   1998016   31.1057   -114.463   0.01   Roca Konsac   ss   -   0   0   
SACA   1997299   -1   31.0757   -115.2794   0.37   Santa Clara   ss   -   0   0   
SAFE   1997297   -1   30.8817   -114.7525   0.091   San Felipe   ss   -   0   0   
SAJO   1997293   -1   30.9574   -115.6864   1.039   San Jose   ss   -   0   0   
SCI   1991001   -1   32.98   -118.5467   0.219   -   -   -   0   0   
SFX   1991001   -1   30.8812   -114.7522   0.055   -   -   -   0   0   
SGL   1991001   -1   32.6493   -115.7263   0.11   -   -   -   0   0   
SPX   1991001   -1   31.0452   -115.4637   2.835   -   -   -   0   0   
SSN   1991001   -1   33.2447   -119.5063   0.259   -   -   -   0   0   
TELM   1997289   -1   30.9826   -116.1342   0.14   San Telmo   ss   -   0   0   
VST   1991001   -1   33.1567   -117.2317   0.112   -   -   -   0   0   
YMD   1991001   -1   32.5547   -114.5447   0.076   -   -   -   0   0   
YUH   1991001   1999060   32.6477   -115.923   0.186   -   -   -   0   0   
YUH   1999060   -1   32.6473   -115.9225   0.186   -   -   -   0   0   

Total: 53

Channel List

(table version)

sta   chan   ondate   chanid   offdate   ctype   edepth   hang   vang   descrip   
ALAM   BHE   1997293   31   -1   n   -0   90   90   -   
ALAM   BHN   1997293   32   -1   n   -0   0   90   -   
ALAM   BHZ   1997293   33   -1   n   -0   0   0   -   
ELAR   BHE   1997298   34   -1   n   -0   90   90   -   
ELAR   BHN   1997298   35   -1   n   -0   0   90   -   
ELAR   BHZ   1997298   36   -1   n   -0   0   0   -   
LACB   BHE   1997296   37   -1   n   -0   90   90   -   
LACB   BHN   1997296   38   -1   n   -0   0   90   -   
LACB   BHZ   1997296   39   -1   n   -0   0   0   -   
LOQI   BHE   1997290   40   -1   n   -0   90   90   -   
LOQI   BHN   1997290   41   -1   n   -0   0   90   -   
LOQI   BHZ   1997290   42   -1   n   -0   0   0   -   
OBTO   BHE   1997293   43   -1   n   -0   90   90   -   
OBTO   BHN   1997293   44   -1   n   -0   0   90   -   
OBTO   BHZ   1997293   45   -1   n   -0   0   0   -   
PUPE   BHE   1997301   46   -1   n   -0   90   90   -   
PUPE   BHN   1997301   47   -1   n   -0   0   90   -   
PUPE   BHZ   1997301   48   -1   n   -0   0   0   -   
ROKO   BHE   1997302   49   1998016   n   -0   90   90   -   
ROKO   BHN   1997302   50   1998016   n   -0   0   90   -   
ROKO   BHZ   1997302   51   1998016   n   -0   0   0   -   
SACA   BHE   1997299   52   -1   n   -0   90   90   -   
SACA   BHN   1997299   53   -1   n   -0   0   90   -   
SACA   BHZ   1997299   54   -1   n   -0   0   0   -   
SAFE   BHE   1997297   55   -1   n   -0   90   90   -   
SAFE   BHN   1997297   56   -1   n   -0   0   90   -   
SAFE   BHZ   1997297   57   -1   n   -0   0   0   -   
SAJO   BHE   1997293   58   -1   n   -0   90   90   -   
SAJO   BHN   1997293   59   -1   n   -0   0   90   -   
SAJO   BHZ   1997293   60   -1   n   -0   0   0   -   
TELM   BHE   1997289   61   -1   n   -0   90   90   -   
TELM   BHN   1997289   62   -1   n   -0   0   90   -   
TELM   BHZ   1997289   63   -1   n   -0   0   0   -   

Total: 33

Selected References

URL: http://eqinfo.ucsd.edu/deployments/north_baja_transect.php [Last updated: 2015-10-22 (295) 23:07:43 UTC]