**Welcome to the 1997 Geologic Hazard Photos CD-ROM**

Photographs of geologic hazards represent a unique form of data that
capture the transience of Earth\'s periodic upheavals. The images taken
of damage caused by these events are a permanent record that would
otherwise have been erased forever by cleanup and reconstruction
projects. Photographs serve as a reminder that such events can---and
probably will---recur, and that we should be prepared to handle their
consequences.

The National Geophysical Data Center (NGDC) and World Data Center A for
Solid Earth Geophysics collected photos of geologic hazards from many
private and governmental sources and have complied these photos into
thirty-six sets of slides. The current release contains all of the
slides from the 1994 Hazards CD-ROM, plus an additional 14 new slide
sets and completely revised software. The slides are presented in
digital format on these three CD volumes.

-   Volume 1 presents **general earthquake topics**,

-   Volume 2 contains images from **earthquake events**, and

-   Volume 3 depicts **landslides, tsunami damage, and volcanic events
    and features.**

We view this as an evolving product. Your suggestions for future
improvements are welcomed.

***Getting Started***

GeoVu software is provided on each CD for access and display of the
image files and their captions. GeoVu will operate on PCs running
Microsoft Windows 3.x or Windows 95, and on Macintosh, UNIX Sun, and
UNIX Silicon Graphics computers. Although GeoVu is present on each CD,
you only need to install the software one time.

Instructions for installing and running GeoVu on the different platforms
are found in the software\\geovu\\pc, software\\geovu\\mac,
software\\geovu\\unix_sgi, and software\\geovu\\unix_sun directories.
More detailed information on GeoVu is provided in the
software\\geovu\\documnt directory.

**Directory Structure**

The three CDs contain similar directory structures. There are three main
directories: **document**, **software**, and **images**.

***Document Directory***

The **document** directory contains the Geologic Hazards User Guide in
several different digital formats. It also contains HTML files to browse
the various image sub-directories.

***Software Directory***

The **software** directory contains the GeoVu and FreeForm software.
Each of the platform subdirectories (pc, mac, unix_sgi, unix_sun)
contains software and installation instructions specific for that
platform.

Additional documentation for GeoVu can also be found in the
**software\\geovu\\documnt** directory. This includes the following
files:

-   gvquick "Getting Started with GeoVu", which covers installation and
    the basics of running GeoVu, available in MS Word 7.0 (\~75kb),
    Adobe Acrobat (\~65kb), PostScript (\~110kb), and text (\~20kb)
    formats,

-   gvhelp \"GeoVu User\'s Guide\", which provides descriptions of GeoVu
    features and options, available in MS Word 7.0 (\~100kb), Adobe
    Acrobat (\~120kb), and PostScript (\~235kb) formats,

-   gvtools \"GeoVu Tools\", which describes the tools and utilities
    available to the data publisher to make data collections
    GeoVu-compatible, available in MS Word 7.0 (\~225kb), Adobe Acrobat
    (\~200kb), PostScript (\~400kb) formats.

Brief instructions for downloading future upgrades of GeoVu from NGDC\'s
File Transfer Protocol (FTP) site and installing the software are in
gvquick.

***Images Directory***

Photos are contained in the **images** directory. Each thematic image
set is represented by a 6-digit number containing a TIF, JPG, and GIF
version of the images. TIF and JPG images are 24-bit, and GIF images are
8-bit. The 6-digit representations are defined as follows:

1.  **Volume 1: Earthquakes---General Topics**

    1.  647001 Earthquake Damage--General

    2.  647004 Earthquake Damage to Transportation Systems

    3.  647005 Earthquake Damage to Schools

    4.  647010 Faults

    5.  647022 The Behavior of Columns During Earthquakes

    6.  647023 Seismic Creep

2.  **Volume 2: Earthquake Events**

    1.  647002 San Francisco, California, April 18, 1906

    2.  647003 Mexico City, Mexico, September 1985

    3.  647007 Great Alaska (Prince William Sound) Earthquake, March 28,
        1964

    4.  647008 Southern California, 1979--1989

    5.  647009 Central California, 1980--1984

    6.  647011 The Armenian USSR, December 1988

    7.  647012 Loma Prieta, California, October 1989, Set 1---Loma
        Prieta Vicinity

    8.  647013 Loma Prieta, California, October 1989, Set 2---San
        Francisco/Oakland

    9.  647014 Northern Iran, Engineering Aspects, June 21, 1990

    10. 647016 The Cape Mendocino (California) Earthquakes, April 25 and
        26, 1992

    11. 647017 The Landers and Big Bear (California) Earthquakes, June
        28, 1992

    12. 647018 Northridge, California, January 17, 1994. Set
        1---Community of Northridge

    13. 647019 Northridge, California, January 17, 1994. Set 2---Other
        Communities

    14. 647020 The San Fernando Valley (California) Earthquakes:
        February 9, 1971 and January 17, 1994

    15. 647021 The Great Hanshin-Awaji (Kobe) Earthquake, January 17,
        1995

    16. 647025 The Shikotan, Kuril Islands, Earthquake, October 4, 1994

3.  **Volume 3: Landslides, Tsunamis, and Volcanoes**

    1.  647006 Landslides

    2.  647015 Environmental Hazards and Mud Volcanoes in Romania

    3.  647024 Erosional Landforms

    4.  648001 Tsunamis--General

    5.  648002 The Major Tsunamis of 1992---Nicaragua and Indonesia

    6.  648003 The Hokkaido Nansei-Oki Tsunami, July 12, 1993

    7.  739001 Volcanoes in Eruption, Set 1

    8.  739002 Volcanic Rocks and Features

    9.  739003 Volcanoes in Eruption, Set 2

    10. 739004 The Eruption of Mount Saint Helens, May 1980

    11. 739005 Hawaii Volcanism: Impact on the Environment

    12. 739006 Hawaii Volcanism: Lava Forms

    13. 739007 Mount Pinatubo, Philippines: June 1991 Eruptions

    14. 739008 The Crater Peak (Mount Spurr), Alaska: Eruptions of 1992

    15. 739009 Mount Pinatubo Revisited; A Study of Lahar Erosion

    16. SLIDE01 Global Relief Slide Sets