HRV Seismogram Archival Project: Scanned Images (1949)Archival Project Top Page
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DigitSeis: Digitization Software
Choose month or day of interest. Once the file of interest is found, please use the right button of your mouse to save the image to your computer.
|← 1948||Back to List of Years||1950 →|
Dates are given as "m1/d1 - m2/d2" where m1 is the starting month, d1 is the starting day, m2 is the ending month, and d2 is the ending day. For the exact time of the start and end of the record, download the information (back side of seismogram) file that accompanies each seismogram file.
The instrument type is either "SP" for short-period recording and "LP" for long-period recording.
The components are "Z" for vertical, "NS" for north-south, and "EW" for east-west. Some of the long-period recordings have two components, e.g., "Z/EW". The "Z/EW" entries are repeated in the first and third columns under "Components" and they are identical copies.
Original Images: The link to each component, e.g., Z, allows the original TIFF image of the seismic recording to be downloaded (1200 dpi in colour for front, 400 dpi in grey for back). Note that the size of the file given in brackets can be large and may take a while to download. The image of the back side of each recording (often showing more detailed information about the recording such as the start and end times) can be obtained from the "Info" link. The information files are typically 60 MB.
Reduced Images: The link to "JPG" provides images that have been converted to JPEG format with some flattening applied. The file sizes are much smaller, and these should be used for initial input for DigitSeis.
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Department of Earth and Planetary Sciences / Harvard University / 20 Oxford Street / Cambridge / MA 02138 / U.S.A. / Telephone: +1 617 495 2350 / Fax: +1 617 496 1907 / Email: firstname.lastname@example.org