火山灰

• Reading: かざんばい
• Romaji: kazanbai
• Kanji breakdown: 火 (ka/hi) — fire | 山 (san/yama) — mountain | 灰 (hai) — ash
• Pronunciation: /ka.zaɴ.baɪ/

Meaning

Volcanic ash. Fine particulate matter ejected from a volcano during an eruption, capable of spreading across vast distances.

A compound noun used in geology, meteorology, and disaster management. Volcanic ash consists of tiny rock and glass fragments distinct from wood ash. In Japan, eruptions of Sakurajima and other active volcanoes regularly deposit 火山灰 on nearby cities. Ash falls can disrupt aviation, agriculture, and daily life, and are tracked by the Japan Meteorological Agency.

Examples

1. 噴火後、街全体が火山灰に覆われ、空が白く霞んだ。 After the eruption, the entire town was blanketed in volcanic ash and the sky turned a hazy white.
2. 火山灰が農作物に積もり、今年の収穫に深刻な影響が出た。 Volcanic ash settled on crops, causing serious damage to this year's harvest.
3. 飛行機は火山灰を避けるため、航路を大幅に変更せざるを得なかった。 The aircraft had no choice but to significantly reroute to avoid the volcanic ash.

Usage Guide

Context: geology, disaster management, meteorology, aviation

Tone: neutral

Origin & History

Compound of 火山 (kazan, 'volcano') and 灰 (hai, 'ash'). 火山 itself combines 火 (fire) and 山 (mountain), making the full compound literally 'fire mountain ash.'

Cultural Context

Era: Modern

Generation: All ages

Social background: Universal