The earthquake was a shallow earthquake caused by deformation due to local fault. The result of source mechanism analysis shows the earthquake had normal fault mechanism.
Jakarta (ANTARA) - An earthquake measuring 5.9 on the Richter scale shook Tojo Una-Una district, Central Sulawesi province on Monday, but no tsunami warning was issued, according to the Meteorology, Climatology and Geophysics Agency (BMKG) .

The epicenter of the earthquake, which struck at 10:52 a.m. WIB (Western Indonesia Time), was located at sea, 55 kilometers northeast of Tojo Una-Una district, at a depth of 10 kilometers, the agency said.

The quake was a shallow earthquake, it added.

“The earthquake was a shallow earthquake caused by deformation due to local fault. The result of source mechanism analysis shows the earthquake had normal fault mechanism,” head of the BMKG's Earthquake and Tsunami Center, Bambang Setiyo Prayitno, said in a statement released on Monday.


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The earthquake was felt at Modified Mercalli Intensity (MMI) scale III-IV in Ampana and at MMI III in Poso, Wakai, BMKG reported.

The tremor was also felt at MMI II-III in Malili, Palu and at MMI II in Toli-Toli, it added.

An earthquake of MMI IV can be felt by several people within and outside their homes, and is accompanied with creaking of windows or doors and other wall sounds.

Meanwhile, an earthquake of MMI III is considered weak and can only be felt indoors as a vibration.


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No immediate reports were received of any material damage, injuries, or fatalities in Monday's quake.

By 11.30 a.m. WIB, no aftershocks had been recorded, based on the result of BMKG’s monitoring.

Central Sulawesi had borne the brunt of a 7.4-magnitude earthquake on September 28, 2018.

The strong earthquake had been followed by a tsunami and soil liquefaction in Palu, capital of Central Sulawesi province. It had claimed 2,102 lives, injured 4,612, and rendered 680 others missing.

A total of 68,451 homes had incurred serious damage, while 78,994 people had been displaced in the 2018 quake.


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Translator: Devi Nindy SR/Suharto
Editor: Fardah Assegaf
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