There has been another earthquake,  with a tsunami warning quickly following,  which really put everyone on alert.   Fortunately it was just a warning without any real danger and didn't lead to an actual disaster that no one wanted.   Viewing this event from a positive point of view,  it is a reminder to us that on normal, calm days,  we should keep our alertness high,  so that if one day we were faced with danger,  we won't panic.