| New Search |
| Fault Name | State |
|---|---|
| Portland Hills fault | Oregon |
| GEOMETRY | |
| Dip (degrees) | 60 |
| Dip direction | SW |
| Sense of slip | reverse |
| Rupture top (km) | 0 |
| Rupture bottom (km) | 15 |
| Rake (degrees) | 90 |
| Length (km) | 50 |
| MODEL VALUES | |
|---|---|
| Probability of activity | 1 |
| Minimum magnitude | 6.5 |
| Maximum magnitude | 7.05 |
| b-value | 0.8 |
| Assigned Dip | Fault-Parallel Slip Rate | Width | Annual Rate | a-value |
|---|---|---|---|---|
| 60 | 0.12 | 17.3 | 7.07e-05 | 0.890 |
| Comments |
|---|
| Although no scarps have been described on Quaternary deposits that overlie the fault, there are geomorphic and geophysical data to support recent movement. Assigned vertical clip rate is from Geomatrix Consultants, Inc. (1995). |
| Selected References |
|---|
| Geomatrix Consultants, Inc., 1995, Seismic design mapping, State of Oregon: Technical report to Oregon Department of Transportation, Salem, Oregon, under Contract 11688, January 1995, unpaginated, 5 pls., scale 1:1,250,000. |