A strong earthquake registered by the USGS as M6.4 hit off the coast of Sumba, Indonesia at 05:10 UTC (13:10 local time) on January 22, 2019. The agency is reporting a depth of 27 km (16.7 miles). The quake was preceded by M6.0 at 23:59 UTC, January 21, M4.9 at 00:08, M4.5 at 00:56 and M4.8 at 01:57 UTC.
The epicenter was located 65 km (40 miles) SSW of Bogorawatu, 142 km (88 miles) WSW of Waingapu and 209 km (130 miles) SSE of Dompu, Indonesia.
There are about 95 000 people living within 100 km (62 miles).
A tsunami was not generated.
An estimated 561 000 people are estimated to have felt light shaking and 15 192 000 weak.
The USGS issued a green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage.
Overall, the population in this region resides in structures that are vulnerable to earthquake shaking, though resistant structures exist. The predominant vulnerable building types are unreinforced brick with concrete floor and precast concrete frame with wall construction.
Recent earthquakes in this area have caused secondary hazards such as landslides that might have contributed to losses.
There were no immediate reports of damage.
Estimated population exposure to earthquake shaking
Selected cities exposed
Featured image credit: Google, TW/SAM