Moderate magnitude 4.0 earthquake at 164 km depth31 Aug 14:30 UTC: First to report: EMSC after 4 minutes.31 Aug 14:32: Now using data updates from BMKG31 Aug 14:33: Magnitude recalculated from 3.9 to 4.0.I didn't feel itI felt this quakeEarthquake detailsDate & timeAug 31, 2026 14:25:51 UTC - Local time at epicenterMonday, Aug 31, 2026, at 10:25 pm (Asia/Makassar GMT +8)Statusconfirmed (manually revised)Magnitude4.0Depth164 kmEpicenter latitude / longitude8.45°S / 119.49°EKabupaten Manggarai Barat, East Nusa Tenggara, IndonesiaSeismic antipode8.45°N / 60.51°WVenezuelaShaking intensityII Very weak shakingFelt0 reportsPrimary data sourceBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)Nearest volcanoGilbanta (19 km / 12 mi)Weather at epicenter at time of quakeScattered Clouds 26.3°C (79 F), humidity: 68%, wind: 1 m/s (2 kts) from SEstimated seismic energy released6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 tons of TNT) | equivalent to ONE quake of magnitude 4.0 | about seismic energy14 minutes agoAug 31, 2026 14:25 GMT / Aug 31, 2026 10:25 pm (Makassar time)Lat / Lng: -8.45 / 119.49: Flores Region, IndonesiaSource: BMKGOther sources: RaspberryShake: 4.0 / 164 km, EMSC: 4.1 / 142 kmDetail info | You felt it? - Report it!';storedMarkers.push(['quake-23326044',-8.45000,119.49000,'14 minutes ago: Mag. 4.0, Flores Region, Indonesia',html,'quakes-6-24.png',25,25,12,12,125]); function mkRep(id,notFelt){var nFelt=notFelt||false;var src="https://www.volcanoesandearthquakes.com/app/earthquake-report.php?quakeId="+id;if(nFelt==true){src+="¬Felt=true";}window.open(src,"","status=0,toolbar=0,location=0,directories=0,menubar=0,resizable=1,scrollbars=1,height=400,width=350");} function locationHashChanged(e){-1!=e.oldURL.indexOf("#popupMap")&&closePopup()} window.onhashchange = locationHashChanged; function comment(e){var t=e.parentNode,a=(t.dataset.id,document.getElementById("commentForm"));"none"==a.style.display?(t.appendChild(a),a.style.display="block"):a.style.display="none"}function sendComment(e){var t=e.parentNode,a=t.parentNode.dataset.id,n=document.getElementById("commentContent"),p=n.value.trim();if(p){var o="id="+a+"&quakeId="+thisQuakeId;o+="&comment="+decodeURIComponent(p),mkRequest("//reports.volcanodiscovery.com/app/eqReportComment.php","post",o,function(e){e.responseText;alert("Thank you for submitting your comment!"),t.style.display="none",n.value=""})}}function flagReport(e){var t=e.parentNode.dataset.id;if(confirm("Report this as inappropriate?")){var a="id="+t+"&quakeId="+thisQuakeId+"&flagAsInappropriate=1";mkRequest("//reports.volcanodiscovery.com/app/eqReportComment.php","post",a,function(t){var a=t.responseText;alert(a),e.style.display="none"})}}function likeReport(e){var t="id="+e.parentNode.dataset.id+"&quakeId="+thisQuakeId+"&like=1";mkRequest("//reports.volcanodiscovery.com/app/eqReportComment.php","post",t,function(t){t.responseText;e.style.opacity=.5})}]]>[smaller] [bigger]Most recent quakes Top 20 past 24 hrs Quakes in BaliNearby placesThe closest larger town where the quake might have been felt is Komodo, a town with 2,000 inhabitants in Indonesia, in 15.6 km (10 mi) distance south of the epicenter. People likely experienced very weak shaking there.The following table shows some of the places that might have been affected (or not) by the shaking.DistancePlaceMax. shaking intensity(*)RegionCountry16 km (10 mi)S of epicenterKomodo(pop: 2,000)II: Very weakKabupaten Manggarai Barat, East Nusa TenggaraIndonesia44 km (27 mi)E of epicenterLabuan Bajo(pop: 188,700)II: Very weakKabupaten Manggarai Barat, East Nusa TenggaraIndonesia57 km (36 mi)W of epicenterSape(pop: 5,000)II: Very weakKabupaten Bima, West Nusa TenggaraIndonesia62 km (39 mi)E of epicenterKondas(pop: 500)II: Very weakKabupaten Manggarai, East Nusa TenggaraIndonesia84 km (52 mi)W of epicenterBima(pop: 161,400)I: Not feltWest Nusa TenggaraIndonesia109 km (67 mi)E of epicenterRuteng(pop: 41,500)I: Not feltKabupaten Manggarai, East Nusa TenggaraIndonesia112 km (70 mi)S of epicenterTambolaka(pop: 35,800)I: Not feltKabupaten Sumba Barat Daya, East Nusa TenggaraIndonesia113 km (70 mi)W of epicenterDompu(pop: 55,000)I: Not feltWest Nusa TenggaraIndonesia159 km (99 mi)SE of epicenterWaingapu(pop: 35,900)I: Not feltKabupaten Sumba Timur, East Nusa TenggaraIndonesia221 km (137 mi)W of epicenterPototano(pop: 5,000)I: Not feltKabupaten Sumbawa, West Nusa TenggaraIndonesia228 km (142 mi)W of epicenterSumbawa Besar(pop: 62,800)I: Not feltKabupaten Sumbawa, West Nusa TenggaraIndonesia243 km (151 mi)E of epicenterEnde(pop: 87,300)I: Not feltEast Nusa TenggaraIndonesia491 km (305 mi)SE of epicenterKupang(pop: 442,800): Not feltEast Nusa TenggaraIndonesiaNotes:(*) Shaking intensity according to the Modified Mercalli Intensity Scale (MMI) and estimated using seismic models.User-reports for this quakeThere are no user reports for this quake yet.If you felt it, be the first to report it!Get the Android appCompare Quake DataData for the same earthquake as reported by different agenciesThe more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.MagDepthTime GMT2026-08-31EpicenterAgency4.0164 km102 mi14:25:51Flores Region, IndonesiaBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)4.0164 km102 mi14:25:51Flores Region, Indonesia0 km (0 mi) epicenter difference with BMKGRaspberryShake (RaspberryShake)4.09142 km88 mi14:25:53FLORES REGION, INDONESIA12 km (7.7 mi) epicenter difference with BMKGEMSC (European-Mediterranean Seismological Centre)Aftershocks for this quakeNo aftershocks have been recorded so far. When aftershocks are detected, we will update this section.What are aftershocks?Larger earthquakes (above magnitude 5 or so) such as this one are usually followed by smaller ones known as aftershocks that occur in the same area during the days, weeks, months or even years after the main shock.[More info]What about this quake?Based on its magnitude, the fault that was active during the quake likely ruptured beneath a surface area of approximately 1 km2 (0 square miles) as a first-order estimate. The length of the rupture zone thus was probably around 2 km (1 mi).[More info]Recorded aftershocks, latest first (0 quake)Aug 31, 2026 10:25 pm (Makassar)14 minutes ago4.0164 km0 km - This quakeFlores Sea, East Nusa Tenggara, 22 km E of Gili Banta Island, IndonesiaMain Shock (this quake)MoreMap of aftershocksEarthquake statisticsAverage number of earthquakesBased on data from the past 26 years and our earthquake archive back to 1900, there are about 375 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 6 or higher: 0.07 quakes per year (or 1 quake every 14.1 years)Mag. 5 or higher: 2.2 quakes per yearMag. 4 or higher: 29.8 quakes per yearMag. 3 or higher: 131 quakes per year (or 10.9 quakes per month)Mag. 2 or higher: 373 quakes per year (or 31.1 quakes per month)Mag. 1 or higher: 376 quakes per year (or 31.3 quakes per month)The area where this quake occurred has a high level of seismic activity. It has had at least 9 quakes above magnitude 6 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 10 to 15 years.Number of quakes per yearPrevious quakes in the same area of this earthquake