Ch. 10 · Accidents & Disaster

An Earthquake Early Warning is issued for areas where seismic intensity of 4 or higher is predicted when the expected magnitude of earthquake motion is approximately seismic intensity 4 or higher.

[True / False · Hard]

Answer: ✕ False

Explanation

The Rules of the Road, under "2. When an Earthquake Early Warning is Issued," states that an Earthquake Early Warning is issued for areas where seismic intensity of 4 or higher is predicted when the expected magnitude of earthquake motion is approximately seismic intensity 5-lower or higher. The question states "seismic intensity 4 or higher," but the correct threshold is "seismic intensity 5-lower or higher."

Driving school curriculumStage 2 – Topic 13: Responding to traffic accidents

Hikari
Hikari
Seismic intensity 4 sounds about right for an early warning, doesn't it?
Momoka
Momoka
Actually, that's wrong! The threshold is seismic intensity 5-lower or higher, not 4—so this statement is false.
Hikari
Hikari
Oh wow, 5-lower is way stronger than 4!
Momoka
Momoka
Yep! The warning only kicks in for serious quakes, so remember: 5-lower is the magic number!

Source: Ch. 10 Accidents & Disaster · Section (第３節 災害などのとき) · ２ 緊急地震速報が発表されたとき

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Source content excerpted from the NPA “Rules of the Road” instructional manual, in the public domain under Japanese Copyright Act Article 13(2). Explanations are AI-assisted and copyrighted by the MenkyoQuest editorial team.