On 19 August 2018 a major earthquake struck with high intensity on the northeast corner of Lombok (Sambelia and Labuhan Lombok settlements) and northwest Sumbawa (Poto Tano settlement) at 22:56 local time, a few km to the east of a series of quakes that had been rocking the area for the past 3 weeks.

[1] The Indonesian BMKG announced that it was a new major earthquake and not an aftershock.

The earthquake occurred on the same overall structure, the Flores back-arc thrust fault.

However, according to scientists, it happened on a different thrust fault as there are many individual structures within the belt.

[3] Heavy tiles fell from the local mosque, and 143 patients were treated outdoors in makeshift tents for injuries on Sumbawa.