Its related to something called "internal vertigo" or "rocking dizziness", and in some cases, it can also be linked to anxiety or inner ear imbalances.
Your fear of earthquakes might also be intensifying this sensation. Sometimes, when weâre anxious or hyper-aware, our brain can misinterpret bodily signals, making us feel movement that isnât there â like a floating or rocking sensation.
Next Steps
Consult a neurologist or ENT specialist or a psychiatrist