Lukas LotarWijayantoIndonesia's Meteorology, Climatology, and Geophysics AgencyEuropean-Mediterranean Seismological CentreUS Geological Survey

7.7-magnitude earthquake strikes off Flores island in Indonesia, triggering tsunami warning and prompting evacuations; aftershocks including 6.1 follow

A 7.7-magnitude earthquake struck off Flores island in eastern Indonesia early Saturday, prompting tsunami warnings and mass evacuations. The quake, initially recorded at 6.9, was followed by aftershocks, including one measuring 6.1, as residents fled to higher ground amid fears of tsunami waves.

ThePrint+1 source15 August 2026 · 00:09 UTC
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A 7.7-magnitude earthquake struck off the coast of Flores island in eastern Indonesia early Saturday, triggering tsunami warnings and prompting evacuations. The quake, which occurred at a depth of 10 km (6.21 miles), was initially recorded at 6.9 before being upgraded by the European-Mediterranean Seismological Centre (EMSC).17

The epicentre was located about 68 kilometres (42 miles) northwest of Ende, according to the US Geological Survey (USGS). Following the initial tremor, strong aftershocks were felt, including one measuring 6.1.38

Residents reported panic as the quake struck. Lukas Lotar, a 31-year-old hospital customer service official, said, “Suddenly it started to shake and I panicked.” He noted that patients fled the hospital and observed cracked walls.

The Indonesian Meteorology, Climatology, and Geophysics Agency (BMKG) warned of potential tsunami waves, with modelling indicating risks for East Nusa Tenggara, South Sulawesi, and West Nusa Tenggara. An alert was issued for waves ranging from 0.5 to 3 metres (1.6 to 9.8 feet).46

In Maumere, residents evacuated to higher ground as the sea receded, a common sign before a tsunami. Authorities reported no casualties but detected tsunami waves between 19 and 30 centimetres.5

Key Insight
“The quake, initially recorded at 6.9, was upgraded to 7.7 by the USGS, with its epicenter 68 km northwest of Ende. BMKG warned of potential tsunami waves up to 3 meters, and residents in Maumere and Nagekeo evacuated as sea receded, though no casualties were reported.”
CuriousCats studied:
1
ThePrint
“Aug 15 (Reuters) – An earthquake of magnitude 7.6 struck off the coast of Indonesia on Saturday in the Flores region, the European-Mediterranean Seismological Centre (EMSC) said.”
ThePrint →
2
NDTV
“A strong 7.7-magnitude earthquake struck off Flores island in eastern Indonesia early Saturday, the US Geological Survey and Indonesian authorities said, triggering a tsunami warning and prompting hundreds to evacuate.”
NDTV →
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