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The quake had a shallow depth of 35 km (22 mi) and was not felt (or at least not reported so).Quake Data | Interactive map | User reports | Earlier quakes here | Quakes in Indonesia | East Nusa Tenggara | West Nusa TenggaraHint: Click on the image to see different maps of this quake!Light magnitude 3.9 earthquake at 35 km depth6 Aug 21:33 UTC: First to report: BMKG after 3 minutes.6 Aug 21:37: Magnitude recalculated from 3.3 to 3.9. Hypocenter depth recalculated from 43.00 to 35.00 km (from 27 to 22 mi). Epicenter location corrected by 5 km (3.1 mi) towards NNW.I didn't feel itI felt this quakeEarthquake detailsDate & timeAug 6, 2026 21:29:41 UTC - Local time at epicenterFriday, Aug 7, 2026, at 05:29 am (Asia/Makassar GMT +8)Statusconfirmed (manually revised)Magnitude3.9Depth35 kmEpicenter latitude / longitude9.46°S / 120.42°EKabupaten Sumba Timur, East Nusa Tenggara, IndonesiaSeismic antipode9.46°N / 59.58°WVenezuelaShaking intensityIII Weak shaking near epicenterFelt0 reportsPrimary data sourceBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)Nearest volcanoPoco Leok (87 km / 54 mi)Weather at epicenter at time of quakeLight Rain 25.5°C (78 F), humidity: 78%, wind: 8 m/s (17 kts) from ESEEstimated seismic energy released4.5 x 1010 joules (12.4 megawatt hours, equivalent to 10.7 tons of TNT) | equivalent to ONE quake of magnitude 3.9 | about seismic energy12 minutes agoAug 6, 2026 21:29 GMT / Aug 7, 2026 05:29 am (Makassar time)Lat / Lng: -9.46 / 120.42: Sumba Region, IndonesiaSource: BMKGOther sources: EMSC: 3.3 / 43 km, RaspberryShake: 3.9 / 35 kmDetail info | You felt it? - Report it!';storedMarkers.push(['quake-23250358',-9.46000,120.42000,'12 minutes ago: Mag. 3.9, Sumba Region, Indonesia',html,'quakes-5-24.png',18,18,9,9,124]); 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 Waingapu, a town with 36,000 inhabitants in Indonesia, in 28 km (17 mi) distance southwest of the epicenter. People likely experienced weak shaking there.The following table shows some of the places that might have been affected (or not) by the shaking.DistancePlaceMax. shaking intensity(*)RegionCountry28 km (17 mi)SW of epicenterWaingapu(pop: 35,900)III: WeakKabupaten Sumba Timur, East Nusa TenggaraIndonesia95 km (59 mi)N of epicenterRuteng(pop: 41,500)II: Very weakKabupaten Manggarai, East Nusa TenggaraIndonesia107 km (66 mi)NW of epicenterKondas(pop: 500)II: Very weakKabupaten Manggarai, East Nusa TenggaraIndonesia122 km (76 mi)NW of epicenterLabuan Bajo(pop: 188,700)II: Very weakKabupaten Manggarai Barat, East Nusa TenggaraIndonesia130 km (81 mi)W of epicenterTambolaka(pop: 35,800)II: Very weakKabupaten Sumba Barat Daya, East Nusa TenggaraIndonesia141 km (87 mi)NW of epicenterKomodo(pop: 2,000)II: Very weakKabupaten Manggarai Barat, East Nusa TenggaraIndonesia153 km (95 mi)NE of epicenterEnde(pop: 87,300)II: Very weakEast Nusa TenggaraIndonesia187 km (116 mi)NW of epicenterSape(pop: 5,000)I: Not feltKabupaten Bima, West Nusa TenggaraIndonesia217 km (135 mi)NW of epicenterBima(pop: 161,400)I: Not feltWest Nusa TenggaraIndonesia218 km (135 mi)NE of epicenterMaumere(pop: 87,700)I: Not feltKabupaten Sikka, East Nusa TenggaraIndonesia238 km (148 mi)NW of epicenterDompu(pop: 55,000)I: Not feltWest Nusa TenggaraIndonesia358 km (223 mi)E of epicenterKupang(pop: 442,800)I: 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 GMT2026-08-6EpicenterAgency3.935 km22 mi21:29:41Sumba Region, IndonesiaBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)3.343 km27 mi21:29:40SUMBA REGION, INDONESIA5 km (3.1 mi) epicenter difference with BMKGEMSC (European-Mediterranean Seismological Centre)3.935 km22 mi21:29:41Sumba Region, Indonesia0 km (0 mi) epicenter difference with BMKGRaspberryShake (RaspberryShake)Previous quakes in the same area of this earthquake12 minutes agoAug 6, 2026 21:29 GMT / Aug 7, 2026 05:29 am (Makassar time)Lat / Lng: -9.46 / 120.42: Sumba Region, IndonesiaSource: BMKGOther sources: EMSC: 3.3 / 43 km, RaspberryShake: 3.9 / 35 kmDetail info | You felt it? - Report it!',3.9,39, '#bb202a', 0.9,1.5, '#bb202a', 0.27);map2.addToMap('thisQuake',-9.46,120.42,'12 minutes ago: Mag. 3.9, Sumba Region, Indonesia','Earthquake: Mag 3.9 / 35 km (22 mi) depth12 minutes agoAug 6, 2026 21:29 GMT / Aug 7, 2026 05:29 am (Makassar time)Lat / Lng: -9.46 / 120.42: Sumba Region, IndonesiaSource: BMKGOther sources: EMSC: 3.3 / 43 km, RaspberryShake: 3.9 / 35 kmDetail info | You felt it? - Report it!','default'); // this will be local to this table obj function putQuakeOnMap(id,lat,lon,time,title,html,mag,zIndex) { qTableOlder.putQuakeOnMap(id,lat,lon,time,title,html,mag,zIndex); } map2.circleScale=0.5;qTableOlder.usePalette=1;qTableOlder.startVal=qTableOlder.referenceTime-(80*365.25*86400);qTableOlder.endVal=qTableOlder.referenceTime; qTableOlder.assignMap(map2); (async function(){await new Promise(r => setTimeout(r,4000));map2.map.setZoom(7)})(); })(); (function(){let done=false;async function loadPrevious(){if(done)return;done=true;while(typeof mkRequest=="undefined")await new Promise(r=>setTimeout(r,500));mkRequest("https://server2.allquakes.com/api/getPrevious.php?quakeId=23250358","get","",function(httpObj){let r=httpObj.responseText,d=document;if(""!=r&&200==httpObj.status){let o=JSON.parse(r);if(!o){let s=d.getElementById("olderQuakesSection");if(s)s.remove();return};let table=d.getElementById("qTableOlder");if(!table)return;table.innerHTML+=o.tableRows,qTableOlder.alternateBg();let ph=d.getElementById("placeholder_largestQText");if(ph)ph.innerHTML=o.html;let wrap=d.getElementById("sectionPreviousCWrap");if(wrap)wrap.style.display="";eval(o.js)}})}let d=document,target=d.getElementById("sectionPreviousCWrap")||d.getElementById("placeholder_largestQText")||d.getElementById("qTableOlder");if(!target||!("IntersectionObserver" in window)){loadPrevious();return}let obs=new IntersectionObserver(function(entries){if(entries.some(e=>e.isIntersecting)){obs.disconnect();loadPrevious()}},{rootMargin:"300px 0px"});obs.observe(target)})();]]>Try our free app!Android | iOS versionSupport Us – Help Us Enhance Our Services!We’re passionate about delivering the latest volcano and earthquake data from around the globe — just for you. 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