An earthquake (지진, jijin) is read as one of the more serious dreams in this entire category, because of what it attacks specifically: the ground itself, the thing everything else in the dream stands on. Where a storm disrupts the sky above you, an earthquake disrupts your foundation.
Traditionally, this is read as sudden, major upheaval in something you'd assumed was stable — a job, a relationship, your health, or your finances shifting abruptly rather than gradually. The dream doesn't specify which area of life is affected; interpreters generally look at whatever felt most at stake elsewhere in the dream, or in your waking circumstances, to narrow the reading.
Buildings or structures collapsing during the earthquake intensifies the warning considerably — read as the actual end of something (an era, a role, a relationship) rather than just a disruption to it. Surviving the earthquake unharmed, by contrast, is read fairly optimistically: whatever upheaval is coming, you come through it intact.
This dream sits close to a very ordinary psychological reading too — earthquake dreams are commonly reported during periods of genuine instability or anxiety about losing control over major life circumstances, independent of any specific cultural tradition. The two readings reinforce rather than contradict each other here: something in your foundation may genuinely be shifting, whether or not the dream is telling you anything you don't already sense.