| Abbreviation | Definition |
|---|---|
| RPIZ | Ross Polynya Ice Zone |
| RPP | Rui Palmeira Pluton |
| RPPV | Resultant Peak Particle Velocity |
| RQD | Rock Quality Designation |
| RR | Reykjanes Ridge |
| RR | Rugged Ridge |
| RRG | Red River Gorge |
| RRN | Red River of the North |
| RRV | Red River Valley |
| RS | Residual soil |
| RSM | Remote Sensing Manual |
| RT | Relative Timing |
| RTA | Riberalta, Bolivia, seismograph station |
| RTOC | Real-Time Operating Centre |
| RTZ | Rio Tinto Zinc |
| RV | Rock Valley |
| RVDS | Rotary Vertical Drilling System |
| RVO | Rabaul Volcano Observatory |
| RVO | Rabaul Volcanological Observatory |
| RVSP | Reversed Vertical Seismic Profile |