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| True | False | Statement |
| All main shocks are preceded by foreshocks. | ||
| All main shocks are followed by aftershocks. | ||
| Aftershocks are more common that foreshocks. | ||
| Foreshocks are generally weaker than aftershocks. | ||
| Main shocks can be triggered by foreshocks. | ||
| An aftershock can be a bigger earthquake than the main shock that preceded it. |
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