# Zhen 震: Thunder

Canonical page: https://thefreeiching.com/trigrams/zhen
Last updated: 2026-10-07

- **Symbol:** ☳ 震
- **Natural image:** Thunder
- **Quality:** the arousing, movement
- **Family role:** Eldest son
- **Lines, bottom to top:** 100 (1 = solid yang, 0 = broken yin)

A trigram is a stack of three lines. Each hexagram is two trigrams: one below (the lower, inner or earlier situation) and one above (the upper, outer or later situation). Zhen appears in sixteen of the sixty-four hexagrams, eight times as the upper trigram and eight as the lower.

## Zhen as the upper trigram

- [16 Enthusiasm](https://thefreeiching.com/library/16)
- [32 Duration](https://thefreeiching.com/library/32)
- [34 Great Power](https://thefreeiching.com/library/34)
- [40 Deliverance](https://thefreeiching.com/library/40)
- [51 The Arousing](https://thefreeiching.com/library/51)
- [54 The Marrying Maiden](https://thefreeiching.com/library/54)
- [55 Abundance](https://thefreeiching.com/library/55)
- [62 Small Preponderance](https://thefreeiching.com/library/62)

## Zhen as the lower trigram

- [3 Difficulty at the Beginning](https://thefreeiching.com/library/3)
- [17 Following](https://thefreeiching.com/library/17)
- [21 Biting Through](https://thefreeiching.com/library/21)
- [24 Return](https://thefreeiching.com/library/24)
- [25 Innocence](https://thefreeiching.com/library/25)
- [27 Nourishment](https://thefreeiching.com/library/27)
- [42 Increase](https://thefreeiching.com/library/42)
- [51 The Arousing](https://thefreeiching.com/library/51)

See also the [eight trigrams](https://thefreeiching.com/trigrams).

## Cite this page

The Free I Ching. "Zhen 震: Thunder." https://thefreeiching.com/trigrams/zhen (updated 2026-10-07).

*The I Ching is a tool for reflection, not a prediction. Nothing here forecasts events or replaces professional advice. Short quotations with a link back are welcome. Please do not republish a page in full. The open data files at [/data](https://thefreeiching.com/data) are licensed CC BY 4.0.*

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Source: The Free I Ching (https://thefreeiching.com/trigrams/zhen). The I Ching is a tool for reflection, not a prediction. Nothing here forecasts events or replaces professional advice.