| Abstract: | Analysis of slope angle and rock type using a geographic information system indicates that about 68 percent of the San Juan metropolitan area has low to no susceptibility to earthquake-induced landslides. This is at least partly due to the fact that 45 percent of the San Juan metropolitan area is constructed on slopes of 3 degrees or less, which are too gentle for landslides to occur. The areas with the highest susceptibility to earthquake-induced landslides account for 6 percent of the surface area. Almost one-quarter (24 percent) of the San Juan metropolitan area is moderately susceptible to earthquake-induced landslides. These areas are mainly in the southern portions of the San Juan metropolitan area, where housing development pressures are currently high because of land availability and the esthetics of greenery and hillside views. The combination of new development and moderate earthquake-induced landslide susceptibility indicate that the southern portions of the San Juan metropolitan area are be at greatest risk. |
| Genre: | USGS Numbered Series |
| ProdID: | 31369 |
| Citation Author: | Santiago, Marilyn; Larsen, Matthew C. |
| Citation Contributing Office: | Geological Survey (U.S.) |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | - |
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| Citation End Page: | |
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| Citation Keywords: | |
| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | 0182916 |
| Citation LatS: | 0181529 |
| Citation LonE: | -0655401 |
| Citation LonW: | -0661601 |
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| Citation No Pagination: | |
| Citation Number Of Pages: | |
| Citation Online Only Flag: | Y |
| Citation Phsyical Description: | 2 Plates |
| Citation Projection: | Lambert conformal conic |
| Citation Public Comments: | In cooperation with the Puerto Rico Planning Board |
| Citation Publisher: | Geological Survey (U.S.) |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 2001-39 |
| Citation Search Results Text: | Map Showing Susceptibility to Earthquake-Induced Landsliding, San Juan Metropolitan Area, Puerto Rico; 2001; OFR; 2001-39; Santiago, Marilyn; Larsen, Matthew C. |
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| Citation Volume: | |
| Citation Year: | 2001 |
| Type: | citation/reference |
| Text: | Map Showing Susceptibility to Earthquake-Induced Landsliding, San Juan Metropolitan Area, Puerto Rico; 2001; OFR; 2001-39; Santiago, Marilyn; Larsen, Matthew C. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (INDEX PAGE): | http://pr.water.usgs.gov/public/online_pubs/ofr_01-39/ |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | Geological Survey (U.S.) |
