M 7.7 Earthquake and Tsunami (1.7 m) in Indonesia on 14 Aug 2026 21:58 UTC

Event summary

This earthquake can have a high humanitarian impact based on the magnitude and the affected population and their vulnerability.

GDACS ID EQ 1558059
Earthquake Magnitude: 7.7M
Depth: 10 Km
Lat/Lon: -8.3101 , 121.3517
Event Date: 14 Aug 2026 21:58 UTC
15 Aug 2026 05:58 Local
Exposed Population: 550 thousand (in MMI>=VII)
Inserted at: 14 Aug 2026 22:21 UTC
INFORM Coping capacity:
4.8 (Indonesia)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 Tsunami GDACS score
NEIC 2.1 1.3 2.1
us6000tkt2 Scaled population (raster) 4.97 Max wave alert 1.68m  
  C1 shakemap -1.73 Max wave realtime 1.68m  
  C2 shakemap 0.79      
  Country Vulnerability 0      
  INFORM_normalised 0.96      
Maximum expected impact using different data sources.
Virtual OSOCC
Meteo assessment
Satellite products
Analytical products
Detailed event map. European Union, 2026. Map produced by EC-JRC.
The boundaries and the names shown on this map do not imply official endorsement or acceptance by the European Union.

Updates on volcanic activity (Smithsonian)

Latest media headlines

At least two killed as magnitude 7.7 quake hits Indonesia 8/15/2026 1:53:00 AM.

A powerful magnitude 7.7 earthquake has struck off the coast of Indonesia’s Flores Island, killing two people and prompting authorities to issue a tsunami warning. The United States Geological Survey (USGS) said the quake struck early Satur
...(more)
Powerful earthquake strikes off Indonesia, tsunami warning lifted 8/15/2026 1:53:00 AM.

MAUMERE, Indonesia: A strong 7.7-magnitude earthquake struck off Flores island in eastern Indonesia early Saturday (Aug 15), sending thousands running in panic after authorities issued a tsunami warning. The epicentre of the shallow quake w
...(more)
Indonesia earthquake: Two people dead and tsunami warning issued after.. 8/15/2026 1:49:00 AM.

Residents in Sikka, on Indonesia''s Flores island, flee to higher ground after the earthquake. Video / AFP. A powerful 7.7-magnitude quake that struck east Indonesia early on Saturday killed two people and triggered a tsunami warning, an e
...(more)
7.7-magnitude quake strikes off Indonesia, tsunami warning issued 8/15/2026 1:49:00 AM.

JAKARTA, Aug. 15 (Xinhua) -- An earthquake with a magnitude of 7.7 jolted off the coast of Flores Island in Indonesia early Saturday, the country''s Meteorology, Climatology and Geophysics Agency (BMKG) said. The epicenter was located 36 km
...(more)

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Estimated casualties (PAGER)

USGS estimates the number of casualties for each earthquake for the Prompt Assessment of Global Earthquakes for Response (PAGER) product.
The graph shows the current fatalities estimate.

Exposed population

Data, images, links, services and documents

For this events, GDACS has links to information from the following sources: EC-JRC (90), NEIC (4), OCHA (1), DesInventar (2), WMO (2), USGS (5), (3), INFORM (4),