An AFP journalist in the capital Taipei felt tremors for nearly a minute as the shallow quake struck shortly after midnight.

The epicentre was recorded 12 kilometres (7.5 miles) north of Yujing, a mango-growing district in southern Taiwan, the USGS said.

Firefighters rescued three people including a child who were trapped in a collapsed house in nearby Nanxi district, video posted on Facebook and verified by AFP showed.

Elsewhere, authorities said a person was injured by falling debris while two people were rescued from elevators.

More than 50 aftershocks have been recorded, said Taiwan's Central Weather Administration which reported the initial quake at magnitude 6.4.

The ceilings of several homes collapsed, while roads were blocked by falling rocks and landslides, the National Fire Agency said.

But the agency reported "no major damage" from the quake, which injured 27 people according to the health ministry.

The aftermath saw classes and office work cancelled in Nanxi district as well as Dapu Township in mountainous Chiayi County, north of the epicentre.

Some roads in Dapu were "damaged and impassable", and water and electricity supplies affected, Chiayi County chief Weng Chang-liang said.

Taiwanese chipmaking giant TSMC said it evacuated workers from some of its central and southern factories when the quake struck.

- Taiwan's enhanced warning system -

Taiwan is frequently hit by earthquakes due to its location on the edges of two tectonic plates near the Pacific Ring of Fire, which USGS says is the most seismically active zone in the world.

The last major earthquake occurred in April 2024 when the island was hit by a deadly 7.4-magnitude tremor that officials said was the strongest in 25 years.

At least 17 people were killed in that quake, which triggered landslides and severely damaged buildings around Hualien.

April's earthquake was the most serious in Taiwan since it was struck by a 7.6-magnitude tremor in 1999.

Some 2,400 people died in that quake, making it the deadliest natural disaster in the island's history.

Since then, Taiwan has updated and enhanced its building code to incorporate quake-resistant construction methods, such as steel bars that allow a building to sway more easily when the ground moves.

Famous for its cutting-edge tech firms, Taiwan has built up an advanced early warning system that can alert the public to potentially serious ground shaking within seconds.

The system has been enhanced over the years to incorporate new tools such as smartphones and high-speed data connectivity, even in some of the most remote parts of the island.

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