Two earthquakes measuring nearly magnitude 6 struck Kepulauan Batu, Indonesia, in the morning hours on Sunday, according to the European Mediterranean Seismological Centre (EMSC).
The first earthquake, pegged by the EMSC at a magnitude 6.1 struck Kepulauan Batu early Sunday, followed by another 5.8 magnitude quake just hours later.
The epicenter was located 320.1 km (198.9 miles) E of Katobu and 320.5 km (199.1 miles) E of Raha, Indonesia.
58 000 people are estimated to have felt weak shaking.
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.
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