A child measures your reaction, not the event
Small children cannot grasp what an earthquake is, but they read the
tremor in a caregiver's voice, the tightness in their face and the
silence in the house with complete accuracy. So the first step is not
talking to the child — it is slowing your own breathing before you do.
You do not have to appear calm. You have to be predictable.
Silence does not protect a child, it isolates them
When adults say nothing so the child "won't worry", the child still
collects information: through a half-open door, from a neighbour, from
a television left on. They fill the gaps with their imagination, and a
child's imagination is usually more frightening than the truth. A
plain, accurate, age-appropriate account is always safer than an
invented silence.
This is not one conversation but many
Children digest information in fragments, not in one sitting. Asking
the same question a fifth time does not mean they did not hear you; it
means they are testing whether the answer is still safe. Answering
with the same calm and, where you can, the same words makes the
repetition itself soothing.