1.
seismic intensity; earthquake intensity level
A measurement on the Japanese seismic intensity scale indicating how strongly an earthquake is felt at a specific location.
震度五強だった。
The seismic intensity was upper 5.
震度三の地震があった。
There was an earthquake of intensity 3.
この地域では最大震度六弱が観測された。
A maximum seismic intensity of lower 6 was recorded in this area.
震度四以上の地震が起きたら避難してください。
Please evacuate if an earthquake of intensity 4 or higher occurs.
The Japanese seismic intensity scale (震度階級) measures how strongly shaking is felt at a given location, distinct from magnitude (マグニチュード) which measures total energy released. The scale runs from 0 to 7, with 5 and 6 each split into 弱 (lower) and 強 (upper), giving 10 levels total.
COMMON COLLOCATIONS:
- 震度五強: upper 5 intensity
- 震度六弱: lower 6 intensity
- 最大震度: maximum seismic intensity
- 震度計: seismometer
CULTURAL NOTE:
Japanese earthquake reports always include 震度 readings for each affected area. This scale is unique to Japan and is managed by the Japan Meteorological Agency. Learners living in Japan will encounter this term frequently in news and emergency alerts.
SIMILAR WORDS:
- 深度: depth — same pronunciation but different meaning
- 進度: degree of progress — also the same pronunciation