震
zhèn · HSK 7
to shake
🫨 earthquake 地震 = ground + 震; 雨 rain on top over 辰, a storm that shakes things
The 雨 radical up top means rain or weather; the bottom 辰 gives the zhèn sound. Together it is the violent weather that makes the ground tremble, as in 地震 (earthquake) and 震动 (to vibrate).
震 — rain radical 雨 + chen 辰 (phonetic)
A semantic-phonetic compound: 雨 'rain' gives the meaning (weather/sky phenomena), while 辰 supplies the sound. Originally referred to thunder and the shaking it causes, then extended to mean 'shake, quake, tremble' as in earthquakes (地震).