Source of information about a major crisis in Norway 2019

The original question was phrased by the source as follows: "Dersom en større krisesituasjon skulle inntreffe, som for eksempel en stor transportulykke, naturkatastrofe, terrorangrep, omfattende forurensning eller lignende - hvor vil du i første omgang søke informasjon om krisen?/ If a major crisis situation would occur, such as a major transport accident, natural disaster, terrorist attack, extensive pollution or similar - where would you initially search for information about the crisis?"