Full Breakdown
Major 7.7-Magnitude Earthquake Strikes Flores Island, Indonesia
8/15/2026, 11:26:53 AM
Core Event: August 15, 2026, 7.7-Magnitude Quake Off Flores
On the morning of August 15, 2026, a shallow undersea earthquake of magnitude 7.7 struck off the eastern coast of Indonesia’s Flores Island. The United States Geological Survey recorded the epicenter 68 km north-northwest of Ende in East Nusa Tenggara province, with a depth reported as 10 km by Indonesia’s Meteorology, Climatology and Geophysics Agency (BMKG) and 15 km by Reuters. The tremor was felt across Flores and neighboring provinces and was followed by aftershocks of magnitudes 6.1, 5.9 and 5.6. A local tsunami warning was issued, then lifted about three hours later after waves of less than 1 metre were recorded.
Background & Context
Indonesia sits on the Pacific “Ring of Fire,” a tectonic belt that generates frequent large earthquakes and volcanic eruptions.
Data & Statistics
- Magnitude & Depth: 7.7; depth 10 km (BMKG) or 15 km.
- Aftershocks: Three major aftershocks of 6.1, 5.9 and 5.6 magnitude (USGS).
- Exposure: USGS estimates roughly 500,000 people experienced very strong or severe shaking.
- Tsunami: Recorded wave heights between 19 cm and 30 cm; brief sea-level recession observed.
- Evacuations: About 2,000 residents in Nagekeo Regency self-evacuated to higher ground.
- Casualties: Reports vary—CNBC cited 20 deaths, Reuters and ABC News reported at least two, while the governor said five; injuries range from four to six.
Official Statements & Responses
BMKG’s earthquake and tsunami director Wijayanto warned of potential tsunami generation for East Nusa Tenggara, South Sulawesi and West Nusa Tenggara, urging residents to stay away from beaches and riverbanks. The national disaster mitigation agency BNPB confirmed the reported death tolls and noted ongoing damage assessments to homes, warehouses and government facilities. Governor Emanuel Melkiades Laka Lena said at least five people died from collapsing rubble while sleeping.
On-the-Ground Reports
Residents described panic and movement toward higher ground. Arnold Welianto, a villager in Talibura, said he was awakened by strong shaking, fled with his child, and saw the sea recede before crowds filled the roads. Hospital staff in Maumere reported patients being moved outside as walls cracked. Yohanna Embu observed a collapsed waiting-room at the Pelni port terminal. Reuters-verified video showed a building in Maumere’s port town collapsing as people screamed and ran.
Conflicting Reports & Gaps
- Death Toll: Figures range from two to twenty; no unified casualty number confirmed.
- Depth of Epicenter: BMKG and the Guardian cite 10 km; Reuters reports 15 km.
- Tsunami Wave Height: BMKG modelling projected up to three metres, yet measured heights were 19-30 cm.
- Damage Assessment: Authorities have not released comprehensive counts of destroyed structures, leaving the scale of property loss uncertain.
Verbatim Quotes
- “The water remained low for quite some time, so everyone panicked and ran - I went around to the community health centre, and the people there had already been evacuated.” — Arnold Welianto
What’s Next
The tsunami warning has been lifted, but BMKG continues to monitor coastal tide gauges. BNPB is aggregating casualty data and conducting damage surveys, while rescue teams remain active in Maumere and attempting to reach the landslide-blocked Nagekeo Regency. Ongoing aftershocks are expected to complicate recovery efforts.
