Moderate magnitude 4.5 earthquake at unknown depth9 Sep 01:09 UTC: First to report: RaspberryShake after 5 minutes.9 Sep 01:09: Now using data updates from BMKGUpdate Wed, 9 Sep 2026, 01:12Moderate magnitude 4.5 quake hits 47 km southeast of Tambolaka, Indonesia in the morningAn earthquake of magnitude 4.5 occurred only 8 minutes ago 47 km southeast of Tambolaka, Indonesia, Indonesia's Meteorology, Climatology, and Geophysical Agency reported.The quake hit at a shallow depth of 10. km beneath the epicenter near Tambolaka, Southwest Sumba Regency, East Nusa Tenggara, Indonesia, in the morning on Wednesday, September 9th, 2026, at 9:04 am local time. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.Our monitoring service identified a second report from the citizen-seismograph network of RaspberryShake which listed the quake at magnitude 4.5 as well.Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.Weak shaking might have been felt in Tambolaka (pop. 35,800) located 47 km from the epicenter, and Waingapu (pop. 35,900) 80 km away.VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.If you were or still are in this area during the quake help others with your feedback and report it here.Download the Volcanoes & Earthquakes app and get one of the fastest seismic alerts online: Android | iOSI didn't feel itI felt this quakeEarthquake detailsDate & timeSep 9, 2026 01:04:28 UTC - Local time at epicenterWednesday, Sep 9, 2026, at 09:04 am (Asia/Makassar GMT +8)Statusconfirmed (manually revised)Magnitude4.5Depth10 kmEpicenter latitude / longitude9.73°S / 119.54°EKabupaten Sumba Tengah, East Nusa Tenggara, IndonesiaSeismic antipode9.73°N / 60.46°WVenezuelaShaking intensityV Moderate shaking near epicenterFelt1 reportPrimary data sourceBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)Nearest volcanoWai Sano (122 km / 76 mi)Weather at epicenter at time of quakeScattered Clouds 26.7°C (80 F), humidity: 73%, wind: 3 m/s (5 kts) from SSEEstimated seismic energy released3.5 x 1011 joules (98.6 megawatt hours, equivalent to 84.8 tons of TNT) | equivalent to ONE quake of magnitude 4.5 | about seismic energy34 minutes ago reported feltSep 9, 2026 01:04 GMT / Sep 9, 2026 09:04 am (Makassar time)Lat / Lng: -9.73 / 119.54: Sumba Region, IndonesiaSource: BMKGOther sources: RaspberryShake: 4.5 / 10 kmDetail info | Read user reports | You felt it? - Report it!';storedMarkers.push(['quake-23347127',-9.73000,119.54000,'34 minutes ago: Mag. 4.5, Sumba 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 Waingapu, a town with 36,000 inhabitants in Indonesia, in 80 km (50 mi) distance east of the epicenter. People likely experienced weak shaking there. Several smaller towns and villages are located closer to the epicenter and might have experienced stronger shaking.The following table shows some of the places that might have been affected (or not) by the shaking.DistancePlaceMax. shaking intensity(*)RegionCountry47 km (29 mi)NW of epicenterTambolaka(pop: 35,800)III: WeakKabupaten Sumba Barat Daya, East Nusa TenggaraIndonesia80 km (50 mi)E of epicenterWaingapu(pop: 35,900)III: WeakKabupaten Sumba Timur, East Nusa TenggaraIndonesia127 km (79 mi)N of epicenterKomodo(pop: 2,000)II: Very weakKabupaten Manggarai Barat, East Nusa TenggaraIndonesia140 km (87 mi)NE of epicenterKondas(pop: 500)II: Very weakKabupaten Manggarai, East Nusa TenggaraIndonesia142 km (89 mi)N of epicenterLabuan Bajo(pop: 188,700)II: Very weakKabupaten Manggarai Barat, East Nusa TenggaraIndonesia143 km (89 mi)NW of epicenterSape(pop: 5,000)II: Very weakKabupaten Bima, West Nusa TenggaraIndonesia161 km (100 mi)NE of epicenterRuteng(pop: 41,500)II: Very weakKabupaten Manggarai, East Nusa TenggaraIndonesia167 km (104 mi)NW of epicenterBima(pop: 161,400)II: Very weakWest Nusa TenggaraIndonesia178 km (110 mi)NW of epicenterDompu(pop: 55,000)II: Very weakWest Nusa TenggaraIndonesia253 km (157 mi)NE of epicenterEnde(pop: 87,300)II: Very weakEast Nusa TenggaraIndonesia269 km (167 mi)NW of epicenterPototano(pop: 5,000)II: Very weakKabupaten Sumbawa, West Nusa TenggaraIndonesia270 km (168 mi)NW of epicenterSumbawa Besar(pop: 62,800)II: Very weakKabupaten Sumbawa, West Nusa TenggaraIndonesia315 km (196 mi)W of epicenterTaliwang(pop: 55,300)II: Very weakKabupaten Sumbawa Barat, West Nusa TenggaraIndonesia318 km (198 mi)NE of epicenterMaumere(pop: 87,700)II: Very weakKabupaten Sikka, East Nusa TenggaraIndonesia344 km (214 mi)NW of epicenterLabuan Lombok(pop: 10,000)I: Not felt344 km (214 mi)NW of epicenterLabuan Lombok(pop: 10,000)I: Not feltIndonesia344 km (214 mi)NW of epicenterLabuan Lombok(pop: 10,000)I: Not feltWest Nusa TenggaraIndonesia448 km (279 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 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 47 km (29 mi) distance northwest 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.Translate47 km of Tambolaka, Southwest Sumba Regency, East Nusa Tenggara (0.3 km SSE of epicenter) [Map] / Light shaking (MMI IV) / single vertical bump / very shortList of cities/places with most reportsPlaceDistance from epicenterAverage reported Shaking IntensityNr. of reportsTambolaka, East Nusa Tenggara, Indonesia(Pop.: 35,790)47 km (29 mi)NW of epicenterIV: Light 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 (*)IV: Light shaking10.4–0.4 km (0.2–0.2 mi)0.4 km (0.2 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 GMT2026-09-9EpicenterAgency4.510 km6.2 mi(*)01:04:28Sumba Region, IndonesiaBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)4.510 km6.2 mi(*)01:04:28Sumba Region, Indonesia0 km (0 mi) epicenter difference with BMKGRaspberryShake (RaspberryShake)Notes:(*) A depth given as 10 km often means that the the depth of the quake could be not determined with sufficient accuracy.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 3 km2 (1 square miles) as a first-order estimate. The length of the rupture zone thus was probably around 3 km (2 mi).[More info]Recorded aftershocks, latest first (0 quake)Sep 9, 2026 09:04 am (Makassar)34 minutes ago4.510 km0 km - This quakeSumba Region, 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 414 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 6 or higher: 0.15 quakes per year (or 1 quake every 6.7 years)Mag. 5 or higher: 2.2 quakes per yearMag. 4 or higher: 32 quakes per year (or 2.7 quakes per month)Mag. 3 or higher: 151 quakes per year (or 12.6 quakes per month)Mag. 2 or higher: 410 quakes per year (or 34.2 quakes per month)Mag. 1 or higher: 413 quakes per year (or 34.4 quakes per month)The area where this quake occurred has a very high level of seismic activity. It has had at least 19 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