Bigyeokjincheonroe (飛擊震天雷) is a bomb used for military purposes in the mid-Joseon Dynasty. It was first invented by Lee Jang-son, a scientisit in the Joseon Dynasty, during the reign of King Seonjo. It is a kind of time bomb with a range of 500 to 600 steps (1 step) when fired through the Daewan port. It is loaded with pieces of iron (ice iron), so that fragments fly out when it explodes.

Gunpowder exploded inside, which was the best weapon to capture Jin, but no one used it in actual combat. On September 1, 1592, Seonjo 25, when Park Jin restored Gyeongju, Bigyeokjincheonroe was fired outside the castle, and it had a great effect. 《Anniversary of King Seonjo》 records that when BigyeokJincheonroe was fired into the castle, the enemies, who did not know what it was, pushed, pulled, and touched each other to watch, and then the cannon exploded, killing 20 people including the enemy general. 

In addition to being designated as a treasure by the Army Museum, the Bigyeokjincheonroe that still remains is excavated from the Gohyeon Fortress Site in Gohari, Gojeon-myeon, Hadong-gun, Gyeongsangnam-do, fragments excavated from the Jinju Fortress Site, and excavated from Seokmari, Samseo-myeon, Jangseong-gun, Jeollanam-do and stored in the Yonsei University Museum.

Area
Jeonju
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Material
Japanese snowbell
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Size
35 x 45 / 60 x 60
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Producer / Design
Auroi
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Making
No. 45 Jeollabuk-do Intangible Cultural Property Jiusan (Hanji Umbrella)