Moderate magnitude 4.3 earthquake at 28 km depth4 Oct 03:56 UTC: First to report: EMSC after 4 minutes.4 Oct 03:57: Now using data updates from BMKG4 Oct 03:59: Magnitude recalculated from 3.8 to 4.3. Hypocenter depth recalculated from 85.00 to 28.00 km (from 53 to 17.4 mi). Epicenter location corrected by 15 km (9.6 mi) towards SSW.I didn't feel itI felt this quakeEarthquake detailsDate & timeOct 4, 2026 03:52:25 UTC - Local time at epicenterSunday, Oct 4, 2026, at 11:52 am (GMT +8)Statusconfirmed (manually revised)Magnitude4.3Depth28 kmEpicenter latitude / longitude11.24°S / 119.09°EIndonesiaSeismic antipode11.24°N / 60.91°W Trinidad and TobagoShaking intensityIII Weak shaking near epicenterFelt1 reportPrimary data sourceBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)Weather at epicenter at time of quakeBroken Clouds 26.8°C (80 F), humidity: 75%, wind: 5 m/s (9 kts) from ESEEstimated seismic energy released1.8 x 1011 joules (49.4 megawatt hours, equivalent to 42.5 tons of TNT) | equivalent to ONE quake of magnitude 4.3 | about seismic energy20 minutes ago reported feltOct 4, 2026 03:52 GMT / Oct 4, 2026 11:52 am (GMT +8)Lat / Lng: -11.24 / 119.09: South of Sumba, IndonesiaSource: BMKGOther sources: RaspberryShake: 4.3 / 28 km, EMSC: 3.8 / 85 kmDetail info | Read user reports | You felt it? - Report it!';storedMarkers.push(['quake-23409390',-11.24000,119.09000,'20 minutes ago: Mag. 4.3, South of Sumba, 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 Tambolaka, a town with 36,000 inhabitants in Indonesia, in 202 km (126 mi) distance north 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(*)RegionCountry202 km (126 mi)N of epicenterTambolaka(pop: 35,800)II: Very weakKabupaten Sumba Barat Daya, East Nusa TenggaraIndonesia218 km (135 mi)NE of epicenterWaingapu(pop: 35,900)II: Very weakKabupaten Sumba Timur, East Nusa TenggaraIndonesia298 km (185 mi)N of epicenterSape(pop: 5,000)I: Not feltKabupaten Bima, West Nusa TenggaraIndonesia298 km (185 mi)N of epicenterKomodo(pop: 2,000)I: Not feltKabupaten Manggarai Barat, East Nusa TenggaraIndonesia308 km (192 mi)N of epicenterDompu(pop: 55,000)I: Not feltWest Nusa TenggaraIndonesia312 km (194 mi)N of epicenterBima(pop: 161,400)I: Not feltWest Nusa TenggaraIndonesia314 km (195 mi)N of epicenterKondas(pop: 500)I: Not feltKabupaten Manggarai, East Nusa TenggaraIndonesia317 km (197 mi)N of epicenterLabuan Bajo(pop: 188,700)I: Not feltKabupaten Manggarai Barat, East Nusa TenggaraIndonesia329 km (204 mi)NE of epicenterRuteng(pop: 41,500)I: Not feltKabupaten Manggarai, East Nusa TenggaraIndonesia356 km (221 mi)NW of epicenterSumbawa Besar(pop: 62,800)I: Not feltKabupaten Sumbawa, West Nusa TenggaraIndonesia360 km (224 mi)NW of epicenterPototano(pop: 5,000)I: Not feltKabupaten Sumbawa, West Nusa TenggaraIndonesia370 km (230 mi)NW of epicenterTaliwang(pop: 55,300)I: Not feltKabupaten Sumbawa Barat, West Nusa TenggaraIndonesia388 km (241 mi)NE of epicenterEnde(pop: 87,300)I: Not feltEast Nusa TenggaraIndonesia402 km (250 mi)NW of epicenterSelong(pop: 92,500)I: Not feltKabupaten Lombok Timur, West Nusa TenggaraIndonesia404 km (251 mi)NW of epicenterLabuan Lombok(pop: 10,000)I: Not felt404 km (251 mi)NW of epicenterLabuan Lombok(pop: 10,000)I: Not feltIndonesia404 km (251 mi)NW of epicenterLabuan Lombok(pop: 10,000)I: Not feltWest Nusa TenggaraIndonesia418 km (260 mi)NW of epicenterPraya(pop: 35,200)I: Not feltKabupaten Lombok Tengah, West Nusa TenggaraIndonesiaNotes:(*) Shaking intensity according to the Modified Mercalli Intensity Scale (MMI) and estimated using seismic models.User-reports for this quake (1)So far, we have received 1 report for this quake from Indonesia.It came from near Tambolaka, a town with 36,000 inhabitants in East Nusa Tenggara in 202 km (126 mi) distance north of the epicenter, Indonesia.This section is being updated as new data comes in.User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.Translate36 km of Tambolaka, Southwest Sumba Regency, East Nusa Tenggara (167.6 km N of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)List of cities/places with most reportsPlaceDistance from epicenterAverage reported Shaking IntensityNr. of reportsTambolaka, East Nusa Tenggara, Indonesia(Pop.: 35,790)202 km (126 mi)N of epicenterIII: Weak shaking1Note: Only reports with latitude/longitude coordinate positions given (1 in total) could be used for statistics.What is Intensity and the Mercalli Intensity Scale?The amount of shaking that occurs on the surface due to an earthquake is called the intensity. It is commonly measured on the so-called Modified Mercalli Intensity Scale (MMI) ranging from 1 (not felt) to 10 (extreme shaking), and given in Roman numerals as I,II,...IX, X, and often displayed with color codes ranging from light blue to dark red.Earthquake intensity depends mainly on the magnitude and depth of the quake as well as the distance from the epicenter: The further away, the less shaking intensity occurs.Read more about the MMI scale!Number of reports by intensityShaking intensityNumber of reportsMin-Max distance from epicenter (*)Average distance (*)III: Weak shaking1167–167 km (104–104 mi)167 km (104 mi)Notes(*) Reports are filtered to exclude those that are likely highly inaccurate or esaggerated.Only reports with latitude/longitude coordinate positions given (1 in total) could be used for geographic statistics.Get the Android appI didn't feel itI felt this quakeIf you were near the epicenter and felt it, please share your experience and submit a short "I felt it" report! Other users would love to hear about it!If you did NOT feel the quake although you were in the area, please report it as well! Your contribution is valuable to earthquake science and seismic hazard analysis.Compare 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 GMT2026-10-4EpicenterAgency4.328 km17 mi03:52:25South of Sumba, IndonesiaBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)4.328 km17 mi03:52:25South of Sumba, Indonesia0 km (0 mi) epicenter difference with BMKGRaspberryShake (RaspberryShake)3.885 km53 mi03:52:26SOUTH OF SUMBA, INDONESIA15 km (9.6 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 2 km2 (1 square miles) as a first-order estimate. The length of the rupture zone thus was probably around 2 km (2 mi).[More info]Recorded aftershocks, latest first (0 quake)Oct 4, 2026 11:52 am (GMT +8)20 minutes ago4.328 km0 km - This quakeIndian Ocean, 202 km S of Tambolaka, IndonesiaMain Shock (this quake)MoreMap of aftershocksEarthquake statisticsAverage number of earthquakesBased on data from the past 56 years and our earthquake archive back to 1900, there are about 34.6 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 6 or higher: 0.11 quakes per year (or 1 quake every 9.3 years)Mag. 5 or higher: 2.7 quakes per yearMag. 4 or higher: 10.1 quakes per yearMag. 3 or higher: 28 quakes per yearMag. 2 or higher: 36.5 quakes per year (or 3 quakes per month)The area where this quake occurred has a very high level of seismic activity. It has had at least 14 quakes above magnitude 6 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 5 to 10 years.Number of quakes per yearPrevious quakes in the same area of this earthquake