Significant M5.7 AFTERSHOCK struck on Monday Morning in the Flores Sea near Ende (Indonesia).

Written by Earthquakelist.org on August 17th, 2026.

In the Flores Sea 66 kilometer from Ende, Indonesia, a significant M5.7 aftershock occurred in the morning of Monday August 17th, 2026.

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Earthquake Summary

This earthquake hit under water in the Flores Sea, 27 kilometers (17 mi) off the coast of Indonesia, 66 kilometer north of Ende in East Nusa Tenggara. The center of this earthquake had a quite shallow depth of 49 km. Shallow earthquakes usually have a larger impact than earthquakes deep in the earth.

Date and Time:	Aug 17, 2026 08:46 (Makassar Time) - Aug 17, 2026 00:46 Universal Time.
Location:	66 km north of Ende, East Nusa Tenggara, Indonesia. Coordinates 8°15'59"S 121°30'53"E.
Map:	Map of area around epicenter. Click to open in Google Maps.
Magnitude:	MAG 5.7 Detected by 188 stations. Maximum Error Range ±0.044 .
Depth:	49 km (30 mi) A quite shallow depth.
Max. Intensity:	V Moderate On the Modified Mercalli Scale.
Tsunami Risk:	Low tsunami risk Earthquakes under MAG-6.5 do not usually cause tsunami's. Always stay cautious - More info here.

Nearby towns and cities

This earthquake may have been felt in Indonesia . Located 66 kilometer (41 mi) north of the epicenter of this earthquake, Ende (East Nusa Tenggara, Indonesia) is the nearest significant population center. Ende experienced an earthquake intensity (MMI Scale) of roughly IV. That level implies light shaking and likely no damage.

The table below provides an overview of all places in proximity of today's earthquake. Where available, the estimated intensity on the Modified Mercalli Intensity Scale in each place is included. Places where this information is omitted likely experienced little impact.

Overview of nearby places

Earthquake Intensity Map

The graph below overlays a map of the region around the epicenter with earthquake intensity data provided by the US Geographic Survey. The highest intensity level detected for this earthquake is V.

This is likely an aftershock

This earthquake is likely an aftershock of the MAG-7.7 earthquake that struck 2 days earlier. That main earthquake hit 19 km (12 mi) west of the epicenter of this MAG-5.7 aftershock.

Overview of foreshocks and aftershocks

More earthquakes coming?

The risk of aftershocks decreases rapidly over time. Usually, aftershocks are at least one order of magnitude lower than a main shock.

It's always adviced to be cautious of the risk of a larger shock following any significant earthquake, however this risk is fairly small. There is a roughly 94 percent change that no larger main shock will follow in the days following this earthquake.

Read: How to Stay Safe during an Earthquake (cdc.gov).

Earthquakes like this happen often in the region

Earthquakes of this strength are very common in the region. In total, 15 earthquakes with a magnitude of 5.7 or higher have been registered within 300km (186 mi) of this epicenter in the past 10 years. This comes down to an average of once every 8 months.

Low tsunami risk

Based on early data it appears this earthquake was not strong enough (lower than MAG-6.5) to be likely to cause destructive tsunami's. However this earthquake appeared to have hit at a shallow depth under sea, so stay cautious and monitor advice from local authorities.

Tsunami Risk Factors

Sources

Last updated 17/08/26 02:58 (). This article is automatically generated based on available data. We keep checking multiple sources for additional information. This article gets updated as new details on this earthquake become available.

1. US Geographic Society (USGS): Earthquake usd0015eay
2. European-Mediterranean Seismological Centre (EMSC): Earthquake 20260817_0000023
3. Geonames.org: World Cities Database
4. Google Maps: Static API
5. Earthquakelist.org: Historic Earthquakes Database

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