A strong inland earthquake in southwestern Japan trapped people inside a shopping center and damaged infrastructure. Here's what made this quake unusual and why aftershocks remain a concern.

Source: [Live Science](https://www.livescience.com/planet-earth/earthquakes/6-8-earthquake-traps-shoppers-as-mall-collapses-in-japan-heres-why-the-seismic-event-was-unusual)

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