Denpasar, Bali, Sept. 25 -- A magnitude 5.7 earthquake that struck parts of Bali and East Java on Thursday was caused by activity along an active fault line, Indonesia's Meteorology, Climatology, and Geophysics Agency (BMKG) reported.

"This was a shallow earthquake triggered by an active fault," said BMKG's Director of Earthquakes and Tsunamis, Daryono, in a statement.

BMKG later revised the earthquake's magnitude to 5.3 following further analysis.

As of 5:40 p.m. Central Indonesian Time (WITA), five aftershocks had been recorded, the strongest of which measured magnitude 3.3.

The tectonic quake was felt most strongly in Banyuwangi, East Java, and Penebel, Bali, with an intensity level of IV on the Modified Mercalli Intensity (MMI) sc...