<meta name="description" content="On October 17, 1989, at 5:04:15 p.m. (P.d.t.) a magnitude 7.1 earthquake severely shook the greater San Francisco and Monterey Bay areas. The epicenter was located approximately 14.5 km (9 mi) northeast of Santa Cruz and 96.6 km (60 mi) south-southeast of San Francisco, near Loma Prieta Peak in the Santa Cruz Mountains. This publication contains over 100 high-resolution photographs of that event.">
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<h1>The October 17, 1989, Loma Prieta, California, Earthquake—Selected Photographs</h1>
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<i>By</i> John K. Nakata, Charles E. Meyer, Howard G. Wilshire, John C. Tinsley, William S. Updegrove, D.M. Peterson, Stephen D. Ellen, Ralph A. Haugerud, Robert J. McLaughlin, G. Reid Fisher, <i>and</i> Michael F. Diggles
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Digital Data Series DDS-29
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Version 1.1
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1999
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U.S. DEPARTMENT OF THE INTERIOR
<br>BRUCE BABBITT, Secretary
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U.S. GEOLOGICAL SURVEY
<br>Charles G. Groat, Director
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<h2>Introduction</h2>
On October 17, 1989, at 5:04:15 p.m. (P.d.t.), a magnitude 7.1 earthquake severely shook the San Francisco and Monterey Bay regions. The epicenter was located approximately 14.5 km (9 mi) northeast of Santa Cruz and 96.6 km (60 mi) south-southeast of San Francisco, near Loma Prieta peak in the Santa Cruz Mountains. The hypocenter was at a depth of 13.5 km (8.4 mi) along the boundary of the Pacific and North American Plates. This boundary is expressed at the surface as the San Andreas Fault Zone.
<h2>About the Loma Prieta earthquake CD—ROM</h2>
This CD—ROM contains 103 digitized color 35-mm images from Open-File Report 90-547 (Nakata and others, 1990). Our photographic coverage reflects the time and resources available immediately after the event and is not intended to portray the full extent of earthquake damage. This CD—ROM provides images for use by the interested public, multimedia producers, desktop publishers, and the high-end printing industry. The digital images are stored in the "photocd" folder and can be read across Macintosh, Windows, DOS, OS/2, SGI, and UNIX platforms which have applications that can read Kodak's <i>Photo-CD (YCC) file format</i>. Up-to-date information about Photo CD is on the World Wide Web at <A HREF="http://www.kodak.com/go/photocd"> http://www.kodak.com/go/photocd</A>. Also included on this CD—ROM are Windows and Macintosh viewers and engines for keyword or geographic searches (Adobe Acrobat Reader with Search). At the time of this publication, Kodak's policy on the distribution of color-management files is still unresolved, and so none is included on this CD-ROM. However, using the Universal Ektachrome or Universal Kodachrome transforms found in your software will provide excellent color.
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<B>Feel free to use any of these images but please cite the photographer and the U.S. Geological Survey</B>.
<h2>View photographs on the screen in GIF and JPEG format</h2>
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SRC="thumbs/001tn_small.gif"><br>Index map of photographic sites (48 KB)
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<ul>
<li><a href="web_pages/sf.html">I. San Francisco Sites</a>
<li><a href="web_pages/bay_bridge.html">II. Bay Bridge</a>
The preview thumbnail and screen-resolution images listed above are in GIF and JPEG formats, respectively, but undergo resolution loss due to downsizing, compression and (or) color-palate reduction relative to the original Photo CD images provided below.
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<A HREF="thumbs/"> <b>CLICK HERE</b></A> to browse the thumbnails (GIF's at about 192 x 128 pixels; /thumbs folder).
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<A HREF="screens/"> <b>CLICK HERE</b></A> to browse the screen-resolution images (JPEG's at about 768 x 512 pixels; /screens folder).
<h2>Acrobat PDF version of photographs</h2>
Because there are no freeware applications that will view or print PCD files, we have provided an Adobe Acrobat Photo CD (PCD) version of this report. Using Adobe Acrobat Reader (versions 3.01 and 4.0 provided on this CD—ROM in the Acrobat folder), you can print high-resolution copies of each photograph with its caption. To download newer versions of Acrobat Reader, if available, you can click on the button below.
<A HREF="dds-29.pdf"> <b>CLICK HERE</b></A> to view a PDF version of the photographs (dd-29.pdf; 40 MB). The images in this file are 600 dpi, sufficient resolution for making high-quality copies on most desktop printers.
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<A HREF="slideshow.pdf"> <b>CLICK HERE</b></A> to view a slideshow (slideshow.pdf; 36 MB). The images in this file are 1024 x 768 pixels. To get the slideshow to advance automatically in your copy of Adobe Acrobat Reader, set File, Preferences, Full Screen, to Advance Every 2 Seconds.
<h2>Photo CD (PCD) version of photographs</h2>
For users who have commercial software that can read and print PCD files, the photographs are provided on this CD—ROM in that format in the "photocd" folder. In the hierarchy of file formats, <I>Photo CD (YCC)</I> resides above BMP, EPS, GIF, JPEG, MOV, PCX, PICT, PSD, TIF, TIFF, etc., enabling end users to go from YCC to other formats, but not in the other direction without losing image quality. Each 24-bit color image is stored as five resolutions:
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<B> 1. Thumbnail</B>—[192 x 128 pixels] Contact-sheet-size images for quick previewing of the entire collection.
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<B> 2. FPO "For Placement Only"</B>—[384 x 256 pixels] A proxy for high-resolution images to determine placement in page-layout programs.
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<B> 3. Screen Resolution</B>—[786 x 512 pixels] Ideal for computer viewing and multimedia projects.
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<B> 4. HDTV High-Definition Television</B>—[1536 x 1024 pixels] Sufficient resolution for high definition TV, newspapers, and high-quality half-page layouts.
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<B> 5. High Resolution</B>—[3072 x 2048 pixels] Provides the printing industry with resolution sufficient for high-quality full-page layouts at 300 dpi/150 lpi and 24-bit color.
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<A HREF="photocd/"> <b>CLICK HERE</b></A> to browse the PCD image collection (PCD's at 3072 x 2048 pixels; /photocd folder).
<h2>Other sources of information about the Loma Prieta earthquake</h2>
