| Abbreviation | Region | Min Lon | Max Lon | Min Lat | Max Lat |
|---|---|---|---|---|---|
| AFC | Africa | 30W | 60E | 40S | 40N |
| CIO | Central Indian Ocean | 55E | 110E | 40S | 10N |
| EPO | Eastern Pacific Ocean | 178W | 130W | 40S | 40N |
| H01 | Pacific West of South America (Hole1) | 140W | 85W | 40S | 25N |
| H02 | North Atlantic (Hole2) | 65W | 10W | 15N | 40N |
| H05 | Western Pacific (Hole5) | 125E | 178E | 5N | 40N |
| NAM | North America | 140W | 55W | 15N | 40N |
| SAM | South America | 95W | 25W | 40S | 20N |
| SAS | South Asia | 55E | 130E | 5N | 40N |
| WMP | Warm Pool | 105E | 178E | 40S | 10N |