Is it true that Mount Fuji's volcano erupted on February 14, 2024? No, that's not true: According to live footage and social media from the Fuji City fire department, there are no reports that the landmark volcano erupted on February 14, 2024, when a user on TikTok posted this claim.
The claim appeared on TikTok (archived here) by @dyrhvq8clwhiace on February 14, 2024. The video shows a picture of Mount Fuji, along with the caption (translated from Japanese to English by Lead Stories staff):
Emergency report!! Mount Fuji Exploded!!
This is what the post looked like on TikTok at the time of writing:
(Source: TikTok screenshot taken on Wed Feb 21 23:01:58 2024 UTC)
Several live feeds (archived here and here) showing the mountain during the same day on February 14, 2024, show Mount Fuji did not erupt. 
(Source: Screenshot taken from Mount Fuji Live Camera Thurs Feb 22 01:27:21 2024 UTC)
The Fuji City fire department's social media (archived here and here) accounts did not report any activity that might be related to an eruption of Mount Fuji, and it showed a picture of the landmark mountain in pristine condition in a post on February 19, 2024 (archived here).
