| 1 | Scientists recorded the magnitude of the earthquake at 8.9. | |
| 2 | Quake locations and magnitudes are indicated by black circles. | |
| 3 | Although the five foreshocks differed from each other in total magnitude, their waveforms were remarkably similar. | |
| 4 | Initial reports indicated that Sunday' s earthquake, while bigger in magnitude, caused no where near the damage. | |
| 5 | At least 25 aftershocks have been reported so far, with the biggest being 6.3 magnitude. |