| Abbreviation | Definition |
|---|---|
| QKV | Quaking Viable |
| QMO | Quartz Mountain State Park seismograph station |
| QNR | Quinn River Seismograph station |
| QOZ | General term used for sand dunes |
| QPO | Quasi-Periodic Oscillation |
| QTF | Quaternary Tectonic Faulting |
| QTZ | Quartz |
| QYF | Holocene Young alluvial Fan deposits |
| QYW | Holocene Young alluvial Wash deposits |
| QZ | Quartzsite |
| QZG | Quezaltepeque seismograph station |
| QZH | Quanzhou seismograph station |
| QZO | Quartz Mountain State Park seismograph station |
| R | River |
| R | Rocks |
| RAP | Rapindik, New Britain, Seismological Station |
| RAT | Rock Abrasion Tool |
| RBC | Round Brilliant Cut |
| RBM | River Basin Management |
| RBOD | Right Bank Outfall Drain |