| N | Name | Lead time* | Origin place | Alarm rate** | Estimated PG | Probable mechanism*** |
| 1 | Seismic foreshocks | 30 - 40 days | Ground | ~20% | ~0.8 - 2 | Fracturing by WGM |
| 2 | Water flux, gas chemistry | 20 - 50 days | Ground | ? | > 1 | WGM |
| 3 | AE-tide synchronism | 21 - 28 days | Ground | ~80%,one site | ~3 - 5 | Fracture triggering |
| 4 | ULF magnetic field noise | 20 - 50 days | Ground | ? | ~1 | EKE by WGM |
| 5 | IR temperature from satellite | 6 - 12 days | Ground surface | ? | >1 | WGM |
| 6 | VLF, LF sounding | 1 - 7 days | Upper atmosphere | ~50%,one site | ~3 - 5 | AGW |
| 7 | HF scattering | 2 - 5 days | Troposphere | ? | ~2 - 4 | AGW |
| 8 | ULF/ELF changes | 2 - 7 days | Troposphere | ~70%,one site | ~2 - 6 | AGW or infrasound |
| 9 | ULF depression | 2 - 4 days | Ionosphere | ~50%,one site | ~2 - 4 | IT modification |
| 10 | VLF signal scattering | 2 - 10 days | Ionosphere | ? | ~0.5 - 5 | IT modification |