Publications on Landslides in Pennsylvania
If your local library does not have the following books and other publications, it can obtain them through interlibrary loan from a larger public or university library. If a publication in the list below is followed by the symbol
, it is available online at the link provided.
General Information on Landslides
Delano, H. L., and Wilshusen, J. P., 2001, Landslides in Pennsylvania: Pennsylvania Geological Survey, 4th ser., Educational Series 9, 2nd ed., 34 p.
View or download
View or download
Creath, W. B., 1996, Homebuyers’ guide to geologic hazards: Westminster, Colo., American Institute of Professional Geologists, 30 p. More information and instructions on ordering [select “Publications” after linking to this site; please note that further information on the publication below is also at this site]
Nuhfer, E. B., Proctor, R. J., and Moser, P. H., 1993, Citizens’ guide to geologic hazards: Westminster, Colo., American Institute of Professional Geologists, 134 p. More information and instructions on ordering [select “Publications” after linking to this site]
Spiker, E. C., and Gori, P. L., 2003, National landslide hazards mitigation strategy—A framework for loss reduction: U.S. Geological Survey Circular 1244, 56 p.
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Turner, A. K., and Schuster, R. L., eds., 1996, Landslides—investigation and mitigation: Washington, D. C., National Academy Press, Transportation Research Board Special Report 247, 673 p. More information and instructions on ordering
Varnes, D. J., 1958, Landslide types and processes, in Eckel, E. B., ed., Landslides in engineering practice: National Research Council, Highway Research Board Special Report 29, p. 20–47.
1:24,000-Scale Maps Grouped by 1- by 2-Degree Quadrangles
These maps were prepared by the U.S. Geological Survey in the late 1970s and early 1980s as part of an Appalachians-wide study of landslides. They show landslides and related features that were identified from aerial photographs with minimal field checking (average one day per quadrangle of field work). They are not intended to be used to indicate landslide susceptibility of specific sites, but rather as a guide to areas where more detailed investigation is appropriate when making decisions about land use or development.

| INDEX TO LANDSLIDE-INVENTORY MAPS | |
| The colored areas show 1- by 2-degree sheets for which landslide-inventory maps were prepared by the U.S. Geological Survey. The inventory maps may be accessed on this site by selecting the map areas above or the links in the list below. | |
1 | Hackman, R. J., and Thomas, R. E., 1978, Landslides and related features, Ohio, West Virginia, and Pennsylvania [Clarksburg 1- by 2-degree sheet]: U.S. Geological Survey Open-File Report 78–1056, 128 maps. View or download |
2 | Davies, W. E., Olmacher, G. C., and Pomeroy, J. S., 1978, Landslides and related features, Ohio, West Virginia, and Pennsylvania [Canton 1- by 2-degree sheet]: U.S. Geological Survey Open-File Report 78–1057, 118 maps. View or download |
3![]() | Pomeroy, J. S., and Davies, W. E., 1979, Landslides and related features, Pennsylvania [Pittsburgh 1- by 2-degree sheet]: U.S. Geological Survey Open-File Report 79–1314, 128 maps. View or download |
4![]() | Pomeroy, J. S., 1981, Landslides and related features, Pennsylvania [Warren 1- by 2-degree sheet]: U.S. Geological Survey Open-File Report 81–238, 112 maps. View or download |
Landslide-Susceptibility Map of Williamsport Area
Delano, H. L., and Wilshusen, J. P., 1999, Landslide susceptibility in the Williamsport 1- by 2-degree quadrangle: Pennsylvania: Pennsylvania Geological Survey, 4th ser., Environmental Geology Report 9, 192 p.

This report consists of a text containing three kinds of information about landslides in the Williamsport 1- by 2-degree quadrangle: (1) a characterization of the types of landslides, including detailed descriptions of typical examples; (2) a partial inventory of more than 1,300 recent and older slides, published in data tables and on page-sized topographic quadrangle maps; and (3) a description of susceptibility zones, which are shown on an accompanying two-color plate at 1:250,000 scale.
Other Maps and Reports
These are mostly formal reports published by the U.S Geological Survey and can be purchased from them or viewed online as indicated below. Each was prepared for a different purpose—some as reports of geologic research, some as tests of ways to look at landslide susceptibility.
Pomeroy, J. S., 1982, Landslides in the Greater Pittsburgh region, Pennsylvania: U.S. Geological Survey Professional Paper 1229, 48 p.
View or download
Briggs, R. P., Pomeroy, J. S., and Davies, W. E., 1975, Landsliding in Allegheny County, Pennsylvania: U. S. Geological Survey Circular 728, 18 p.
View or download
Pomeroy, J. S., and Davies, W. E., 1975, Map of susceptibility to landsliding, Allegheny County, Pennsylvania: U.S. Geological Survey Miscellaneous Field Studies Map MF–685–B, 2 sheets, scale 1:50,000. (This is essentially the same information as that shown on the quadrangle maps in Open-File Reports 78–1057 and 79–1314, presented at county scale.) More information and instructions on ordering
Pomeroy, J. S., 1980, Storm-induced debris avalanching and related phenomena in the Johnstown area, Pennsylvania, with references to other studies in the Appalachians: U.S. Geological Survey Professional Paper 1191, 24 p.
View or download
Pomeroy, J. S., 1982, Mass movement in two selected areas of western Washington County, Pennsylvania: U.S. Geological Survey Professional Paper 1170–B, 17 p.
View or download
Pomeroy, J. S., 1986, Slope movements in the Warren-Allegheny Reservoir area, northwestern Pennsylvania: U.S. Geological Survey Bulletin 1650, scale 1:50,000.
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Pomeroy, J. S., 1978, Map showing landslides and areas most susceptible to landsliding, Butler County, Pennsylvania: U.S. Geological Survey Miscellaneous Field Studies Map MF–1024, 2 sheets, scale 1:50,000. More information and instructions on ordering
Briggs, R. P., 1974, Map of overdip slopes that can affect landsliding in Allegheny County, Pennsylvania: U.S. Geological Survey Miscellaneous Field Studies Map MF–543, scale 1:125,000. More information and instructions on ordering
Kohl, W. R., 1976, Map of overdip slopes that can affect landsliding in Armstrong County, Pennsylvania: U.S. Geological Survey Miscellaneous Field Studies Map MF–730, scale 1:125,000. More information and instructions on ordering
Pomeroy, J. S., 1986, Map showing slope movements in the Oak Forest quadrangle, Greene County, southwestern Pennsylvania: U.S. Geological Survey Miscellaneous Field Studies Map MF–1794, scale 1:24,000. More information and instructions on ordering
Please address comments or questions regarding this page to Helen Delano, 717-702-2031.
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