World-Wide Standardized Seismographic Network Film Chip Scans

These are the scanned digital images of microfilm copies of paper seismic records from the World-Wide Standardized Seismographic Network (WWSSN). This data set spans from 1962 to 1978 and contains about 3.7 million single-day records, which is about 5% of the entire archive. Overall the data set contains 153 magnitude 6+ earthquakes and 156 nuclear explosions. All scans were done using 400 ppi or greater resolution in TIFF format. The scans contained in this data release are detailed in Alejandro and others (2019). Details of the instrumentation can be found at Peterson, J., and Hutt, C. R. (2014). Data are organized by station and date. It is possible to digitize these data into time series data using digitization software, such as Ishii, M., and H. Ishii (2022). An archive of waveforms digitized from these data is available in Lee (2022). An example of analyzing and determining the quality of these data can be found in: Ringler, A. T., and others (2020).

Data files for this data release are numerous and cannot be easily displayed for browsing in the ScienceBase interface. Therefore, the data files are provided via a Globus Access Portal (linked under Related External Resources). Globus* is a fast, secure, and reliable way to move large data files and will automatically resume transfers when there are network disruptions. Learn more at https://www.globus.org/data-transfer.  
 
* Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 

Alejandro A. C. B., Hutt, C. R., Ringler, A. T., Moore, S. V., Anthony, R. E., and Wilson, D. C. (2019). The Albuquerque Seismological Lab WWSSN Film Chip Preservation Project, Seismological Research Letters, 90, 1, 401-408, https://doi.org/10.1785/0220180275.

Ishii, M., and H. Ishii (2022). DigitSeis: Software to extract time series from analogue seismograms: Progress in Earth and Planetary Science, 9, 1, https://doi.org/10.1186/s40645-022-00508-0.

Lee, T. H. (2022). http://seismology.harvard.edu/research/analogue/WWSSNmicrofiche.html.

Peterson, J., and Hutt, C. R. (2014). World-Wide Standardized Seismograph Network: A Data Users Guide: U.S. Geological Survey Open-File Report, 2014-1218, 74 p., https://doi.org/10.3133/ofr20141218.

Ringler, A. T., D. C. Wilson, E. Wolin, T. Storm, and L. Sandoval (2020). Calibration analysis and noise estimates of WWSSN station ALQ (Albuquerque, New Mexico): Seismological Research Letters, 91, 3, 1359-1366, https://doi.org/10.1785/0220190201.