Archives by Stations

Introduction
These archives contain seismograms and related materials of the "Reference Stations of the World". These Reference Stations are chosen for their strategic locations and long durations in operation.

Volunteers are welcome.  Please contact William H. K. Lee at: <lee@usgs.gov>

1. San Juan, Puerto Rico    

A seismographic station in Puerto Rico has been in operation as Vieques (VQS) from 1903-1924, as San Juan (SJP) from 1926-1963, and San Juan (SJG) from 1963 to the present. For SJP, the station information is given in the file: SanJuan_Charlier1953.pdf  Station information about VQS and SJG is now in preparation.

Each seismogram on microfilm was scanned at 8-bit gray scale and high resolution (2400 dpi or better, so that it is equivalent to 300 dpi or better for the original-size seismogram before microfilming) and image editing was performed for quality control. The filename include station code, year, month, date, and component of the seismogram.

[in development: image files will be linked here]

Supported by volunteers.