JAKARTA, Dec. 6 (Xinhua) — A shallow under-land quake measuring 5.7-magnitude jolted Lombok of West Nusa Tenggara province of central Indonesia early on Thursday, the meteorology and geophysics agency said here.

The quake struck at 08:02 a.m. local time, with the epicenter located 23 km northwest of Mataram, the provincial capital, and 10 km under-earth, Muhammad Fadil, an official of the agency, told Xinhua via telephone.

Indonesia is prone to quakes as it lies on a vulnerable quake-affected zone called the Pacific Ring of Fire.