Earthquakes Frequently Occur in Japan

Earthquakes frequently occur these days.
Because of that, I think my senses for detecting an earthquake have become less sharp than before.

I sometimes notice an earthquake by looking at when the light hanging from the ceiling starts swaying.

The alert system of my apartment immediately warns us with the loud sounds when any earthquake with a seismic intensity of 3.0 or more on Japanese earthquake scale is expected to occur.
It usually starts a countdown from ten to zero.
The sounds is so loud that it always scares me.
The other day, it said



"The earthquake is coming.       ZERO!"




Huh??!! Zero?!



I thought the epicenter was close to my place, and that there wasn't enough time for a countdown.




I hate earthquakes!