noun
disaster occurrence; outbreak of a disaster
Refers to the event of a disaster happening or striking. Often used in news reports and official announcements.
台風による災害発生が懸念されている。
There are concerns about the occurrence of disasters due to the typhoon.
災害発生時には、まず身の安全を確保してください。
When a disaster occurs, first ensure your own safety.
Compound of 災害 (disaster) and 発生 (occurrence). The kanji 災 means 'calamity', 害 means 'harm', 発 means 'departure/emit', and 生 means 'life/birth'. The reading はっせい is a standard rendaku-influenced reading of 発生.