Light magnitude 3.9 earthquake at unknown depth31 Oct 16:56 UTC: First to report: EMSC after 3 minutes.31 Oct 16:57: Now using data updates from BMKG31 Oct 16:59: Magnitude recalculated from 3.8 to 3.9.31 Oct 17:05: Epicenter location corrected by 4.6 km (2.8 mi) towards NNW.I didn't feel itI felt this quakeEarthquake detailsDate & timeOct 31, 2025 16:53:33 UTC - Local time at epicenterFriday, Oct 31, 2025, at 04:53 pm (Universal Time GMT +0)Statusconfirmed (manually revised)Magnitude3.9Depth10 kmEpicenter latitude / longitude10.09°S / 118.82°EIndonesiaSeismic antipode10.09°N / 61.18°W Trinidad and TobagoShaking intensityIV Light shaking near epicenterFelt0 reportsPrimary data sourceBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)Nearest volcanoDoro Saboke (160 km / 99 mi)Weather at epicenter at time of quakeBroken Clouds 28.6°C (83 F), humidity: 74%, wind: 4 m/s (7 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 agoOct 31, 2025 16:53 GMT / Oct 31, 2025 04:53 pm (Universal Time)Lat / Lng: -10.09 / 118.82: South of Sumbawa, IndonesiaSource: BMKGOther sources: EMSC: 3.8 / 10 km, RaspberryShake: 3.9 / 10 kmDetail info | You felt it? - Report it!';storedMarkers.push(['quake-22337978',-10.09000,118.82000,'12 minutes ago: Mag. 3.9, South of Sumbawa, 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 Tambolaka, a town with 36,000 inhabitants in Indonesia, in 87 km (54 mi) distance northeast 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(*)RegionCountry87 km (54 mi)NE of epicenterTambolaka(pop: 35,800)II: Very weakKabupaten Sumba Barat Daya, East Nusa TenggaraIndonesia165 km (103 mi)E of epicenterWaingapu(pop: 35,900)I: Not feltKabupaten Sumba Timur, East Nusa TenggaraIndonesia170 km (106 mi)N of epicenterSape(pop: 5,000)I: Not feltKabupaten Bima, West Nusa TenggaraIndonesia177 km (110 mi)N of epicenterDompu(pop: 55,000)I: Not feltWest Nusa TenggaraIndonesia182 km (113 mi)N of epicenterBima(pop: 161,400)I: Not feltWest Nusa TenggaraIndonesia182 km (113 mi)NE of epicenterKomodo(pop: 2,000)I: Not feltKabupaten Manggarai Barat, East Nusa TenggaraIndonesia213 km (132 mi)NE of epicenterLabuan Bajo(pop: 188,700)I: Not feltKabupaten Manggarai Barat, East Nusa TenggaraIndonesia215 km (134 mi)NE of epicenterKondas(pop: 500)I: Not feltKabupaten Manggarai, East Nusa TenggaraIndonesia235 km (146 mi)NW of epicenterSumbawa Besar(pop: 62,800)I: Not feltKabupaten Sumbawa, West Nusa TenggaraIndonesia237 km (148 mi)NW of epicenterPototano(pop: 5,000)I: Not feltKabupaten Sumbawa, West Nusa TenggaraIndonesia244 km (152 mi)NE of epicenterRuteng(pop: 41,500)I: Not feltKabupaten Manggarai, East Nusa TenggaraIndonesia263 km (163 mi)NW of epicenterTaliwang(pop: 55,300)I: Not feltKabupaten Sumbawa Barat, West Nusa TenggaraIndonesia295 km (183 mi)NW of epicenterLabuan Lombok(pop: 10,000)I: Not felt295 km (183 mi)NW of epicenterLabuan Lombok(pop: 10,000)I: Not feltIndonesia295 km (183 mi)NW of epicenterLabuan Lombok(pop: 10,000)I: Not feltWest Nusa TenggaraIndonesia298 km (185 mi)NW of epicenterSelong(pop: 92,500)I: Not feltKabupaten Lombok Timur, West Nusa TenggaraIndonesia319 km (198 mi)NW of epicenterPraya(pop: 35,200)I: Not feltKabupaten Lombok Tengah, West Nusa TenggaraIndonesia325 km (202 mi)NW of epicenterBangsal(pop: 100)I: Not feltWest 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!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 GMT2025-10-31EpicenterAgency3.910 km6.2 mi(*)16:53:33South of Sumbawa, IndonesiaBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)3.810 km6.2 mi(*)16:53:32SOUTH OF SUMBAWA, INDONESIA4.6 km (2.8 mi) epicenter difference with BMKGEMSC (European-Mediterranean Seismological Centre)3.910 km6.2 mi(*)16:53:33South of Sumbawa, 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.Earthquake statisticsAverage number of earthquakesBased on data from the past 25 years and our earthquake archive back to 1900, there are about 196 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 6 or higher: 0.14 quakes per year (or 1 quake every 7.1 years)Mag. 5 or higher: 2.5 quakes per yearMag. 4 or higher: 31.8 quakes per year (or 2.7 quakes per month)Mag. 3 or higher: 121 quakes per year (or 10.1 quakes per month)Mag. 2 or higher: 194 quakes per year (or 16.1 quakes per month)Mag. 1 or higher: 195 quakes per year (or 16.3 quakes per month)The area where this quake occurred has a very high level of seismic activity. It has had at least 17 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 earthquakeThe earthquake occurred 2 weeks after a magnitude 4.0 earthquake had hit on Wednesday, Oct 15, 2025, at 08:15 pm (GMT +8 local time) in 52 km (32 mi) distance to the east:Mag. 4.0 earthquake Sumba Region - Indonesia - Oct 15, 2025 - The largest quake near the epicenter of this quake during the 10 years before was an event of magnitude 6.3. It had occurred 7 years earlier, on Tuesday, Jan 22, 2019, at 01:10 pm (GMT +8 local time) in Indian Ocean, Indonesia:Mag. 6.3 earthquake South of Sumbawa - Indonesia - Jan 22, 2019 - The strongest-ever (since 1900) recorded quake in this area measured magnitude 8.3. It had occurred 48 years ago earlier, on Friday, Aug 19, 1977, at 02:08 pm (GMT +8 local time) in East Nusa Tenggara, Indonesia:Mag. 8.3 earthquake south of Sumbawa - Indonesia - Aug 19, 1977 - Below is a list and map of larger or recent quakes that had occurred near the epicenter before this earthquake (within up to 100 km/61 mi distance, up to 300 km/183 mi for very large quakes above mag. 7). Filter and sort the list by magnitude or time.Max results102050100AllMagnitudeAll2+3+4+5+6+7+8+Time before48 hours1 week30 days1 year5 years30 yearsAny ageDate and TimeMagDepthDistanceLocationDetailsMapOct 27, 08:01 pm (Makassar)3.045 km92 km (57 mi) to the E Sumba Region, Indonesia I FELT ITInfoOct 27, 04:23 am (Makassar)3.138 km68 km (42 mi) to the NE 20 km south of Tambolaka, Indonesia I FELT IT - 1 reportInfoOct 25, 11:20 am (Makassar)3.510 km73 km (45 mi) to the N 20 km west of Tambolaka, Indonesia I FELT ITInfoOct 24, 04:34 am (GMT +8)3.011 km4.7 km (2.9 mi) to the NWIndian Ocean, 86 km southwest of Tambolaka, IndonesiaInfoOct 24, 02:58 am (GMT +8)3.07 km23 km (14 mi) to the NIndian Ocean, 65 km southwest of Tambolaka, IndonesiaInfoOct 15, 08:15 pm (GMT +8)4.010 km52 km (32 mi) to the EIndian Ocean, 76 km south of Tambolaka, IndonesiaInfoOct 15, 06:39 pm (GMT +8)4.210 km53 km (33 mi) to the E Sumba Region, IndonesiaInfoOct 5, 06:36 am (GMT +8)4.215 km46 km (29 mi) to the NIndian Ocean, 66 km southwest of Tambolaka, IndonesiaInfoSep 8, 06:00 pm (GMT +8)4.480 km80 km (50 mi) to the NW Sumbawa Region, IndonesiaInfoAug 31, 08:49 am (Makassar)3.946 km45 km (28 mi) to the NEIndian Ocean, 42 km southwest of Tambolaka, IndonesiaInfoJul 17, 05:04 pm (GMT +8)5.726 km47 km (29 mi) to the SEIndian Ocean, 96 km south of Tambolaka, Indonesia 3 reportsInfoJan 23, 2019 07:39 pm (GMT +8)5.610 km28 km (18 mi) to the SIndian Ocean, 175 km southwest of Waingapu, Indonesia 4 reportsInfoJan 22, 2019 01:10 pm (GMT +8)6.316 km31 km (19 mi) to the SEIndian Ocean, 112 km southwest of Pulau Sumba Island, Indonesia 26 reportsInfoJan 22, 2019 07:59 am (GMT +8)5.915 km30 km (19 mi) to the SEIndian Ocean, 117 km southwest of Pulau Sumba Island, Indonesia 2 reportsInfoFeb 12, 2016 06:02 pm (Makassar)6.138 km63 km (39 mi) to the NE Sumba Region, Indonesia 16 reportsInfoNov 28, 2009 02:04 pm (GMT +8)6.015 km36 km (22 mi) to the SIndian Ocean, 115 km south of Tambolaka, IndonesiaInfoOct 25, 2009 04:54 am (GMT +8)5.635 km22 km (14 mi) to the NIndian Ocean, 71 km southwest of Tambolaka, IndonesiaInfoMay 24, 2007 09:06 am (Makassar)5.638 km60 km (37 mi) to the NIndian Ocean, 50 km west of Tambolaka, IndonesiaInfoJul 24, 2002 11:05 am (GMT +8)5.929 km92 km (57 mi) to the NIndian Ocean, East Nusa Tenggara, 93 km south of Bima, IndonesiaInfoOct 30, 2000 08:01 pm (Makassar)6.033 km51 km (32 mi) to the NEKabupaten Sumba Barat Daya, 130 km west of Waingapu, IndonesiaInfoOct 7, 2000 07:57 pm (Makassar)5.933 km62 km (39 mi) to the EIndian Ocean, 63 km south of Tambolaka, IndonesiaInfoJan 29, 2000 06:57 am (GMT +8)5.683 km45 km (28 mi) to the NIndian Ocean, 60 km southwest of Tambolaka, IndonesiaInfoFeb 11, 1997 03:25 am (Makassar)5.933 km91 km (56 mi) to the NEKabupaten Sumba Tengah, 83 km west of Waingapu, IndonesiaInfoDec 19, 1986 11:41 am (Makassar)6.525 km46 km (29 mi) to the NEIndian Ocean, 55 km south of Tambolaka, IndonesiaInfoOct 5, 1984 12:31 am (GMT +8)6.334 km31 km (20 mi) to the NIndian Ocean, 65 km southwest of Tambolaka, IndonesiaInfoAug 26, 1977 02:09 am (GMT +8)6.133 km48 km (30 mi) to the SEIndian Ocean, 114 km south of Tambolaka, IndonesiaInfoAug 26, 1977 02:05 am (GMT +8)6.133 km88 km (54 mi) to the SEIndian Ocean, 146 km south of Tambolaka, IndonesiaInfoAug 20, 1977 11:58 am (GMT +8)5.833 km95 km (59 mi) to the SIndian Ocean, 166 km south of Tambolaka, IndonesiaInfoAug 20, 1977 05:35 am (GMT +8)5.833 km99 km (62 mi) to the SEIndian Ocean, 162 km south of Tambolaka, IndonesiaInfoAug 20, 1977 04:20 am (GMT +8)5.833 km100 km (62 mi) to the S Sumba region, IndonesiaInfoAug 19, 1977 02:43 pm (GMT +8)6.133 km71 km (44 mi) to the SWIndian Ocean, 157 km southwest of Tambolaka, IndonesiaInfoAug 19, 1977 02:08 pm (GMT +8)8.325 km129 km (80 mi) to the S south of Sumbawa, IndonesiaInfoJan 2, 1977 05:55 pm (GMT +8)6.319 km20 km (13 mi) to the SE 151 km WSW of Waingapu, IndonesiaInfoApr 13, 1951 06:14 pm (GMT +8)6.225 km27 km (17 mi) to the NEIndian Ocean, 63 km south of Tambolaka, IndonesiaInfoNov 22, 1945 08:50 pm (Universal Time)6.035 km43 km (27 mi) to the NIndian Ocean, 62 km southwest of Tambolaka, IndonesiaInfoDec 21, 1938 12:26 pm (Universal Time)6.325 km37 km (23 mi) to the NIndian Ocean, 62 km southwest of Tambolaka, IndonesiaInfoAug 24, 1938 03:43 pm (Universal Time)5.735 km21 km (13 mi) to the NEIndian Ocean, 66 km southwest of Tambolaka, IndonesiaInfoFeb 24, 1931 05:28 pm (Universal Time)6.035 km28 km (18 mi) to the NIndian Ocean, 64 km southwest of Tambolaka, IndonesiaInfoJul 26, 1928 12:15 pm (Universal Time)5.635 km51 km (31 mi) to the NEIndian Ocean, 39 km south of Tambolaka, IndonesiaInfoOct 15, 1923 07:32 am (Universal Time)6.315 km89 km (55 mi) to the EIndian Ocean, 47 km southwest of Pulau Sumba Island, IndonesiaInfoMay 9, 1922 01:50 pm (Universal Time)6.935 km92 km (57 mi) to the NIndian Ocean, 63 km west of Tambolaka, IndonesiaInfoMap of earlier quakes in the area of this quakeMax results102050100AllMagnitudeAll2+3+4+5+6+7+8+Time before48 hours1 week30 days1 year5 years30 yearsAny ageOldest quakes are shown in yellow, most recent in red.[quakes -][quakes +][smaller][bigger]