jälkiläiset

Jälkiläiset, also known as "aftershocks," are seismic events that occur after a larger earthquake, known as the mainshock. They are typically less powerful than the mainshock and can continue for days, weeks, or even months after the initial event. The frequency and intensity of aftershocks decrease over time, following a pattern known as the Omori law, which states that the rate of aftershocks decreases exponentially with time.

Aftershocks are caused by the readjustment of the Earth's crust following the mainshock. This process can involve the release of additional stress along the fault or the triggering of new faults. The distribution of aftershocks can provide valuable information about the geometry and behavior of the fault that ruptured during the mainshock.

The study of aftershocks is crucial for understanding earthquake sequences and improving earthquake hazard assessments. By analyzing aftershocks, seismologists can better predict the likelihood and magnitude of future earthquakes in a region. This information is essential for developing effective earthquake preparedness and mitigation strategies, ultimately helping to protect lives and infrastructure.