| foreshock definitions |
| # | Definition | Sets |
| 1 | a small earthquake that often proceeds a major earthquake | 4 sets |
| 2 | small earthquake that often precedes a major earthquake | 2 sets |
| 3 | small earthquakes that often precede a major earthquake | 2 sets |
| 4 | a small tremble before an earthquake | 2 sets |
| 5 | a small earthquake that often precedes a major earthquake | 1 set |
| 6 | small earth quakes that often come before a major earthquake | 1 set |
| 7 | small earthquakes that come days or years before a major earthquake | 1 set |
| 8 | small earthquake preceding main earthquake | 1 set |
| 9 | small earthquakes that happens before a earthquake | 1 set |
| 10 | series of earthquakes, leading to a large scale earthquake | 1 set |
| 11 | smaller earthquakes that come before the main earthquake | 1 set |
| 12 | a minor tremor of the earth that precedes (comes before) a larger earthquake. | 1 set |
| 13 | small vibrations or small earthquakes seen before an earthquake occurs, unpredictable | 1 set |
| 14 | where the first motion of an earthquake occurs | 1 set |
| 15 | small earthquake that often precedes a major earthquake. | 1 set |
| 16 | a small earthquake that incurs in the vicinity of, but before, a main shock. | 1 set |
| 17 | small earthquakes often come before a earthquake | 1 set |
| 18 | small earthquakes that usually come before a major earthquake | 1 set |
| 19 | small earthquakes that often come before a major earthquake | 1 set |
| 20 | a small earthquake that occurs in the vicinity of, but before, a main shock. | 1 set |
| 21 | small quakes before a main shock | 1 set |
| 22 | small earthquakes that often come before the main earthquake | 1 set |
| 23 | a small tremble before an earthquake, may occur days or years before eq | 1 set |
| 24 | may occur days or years before the major earthquake | 1 set |
| 25 | a small burst of shaking that occurs before a large earthquake | 1 set |
| 26 | small earthquakes that come before an earthquake | 1 set |
| 27 | a little earthquake that might preceed a larger one. | 1 set |