Moderate magnitude 4.1 earthquake at 195 km depth4 Oct 12:11 UTC: First to report: EMSC after 4 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeOct 4, 2026 12:07:54 UTC - Local time at epicenterSunday, Oct 4, 2026, at 08:07 am (GMT -4)StatusconfirmedMagnitude4.09Depth195 kmEpicenter latitude / longitude21.29°S / 67.77°WDepartamento de Potosi, BoliviaAlso near: Chile 43 km (27 mi) awaySeismic antipode21.29°N / 112.23°EChinaShaking intensityII Very weak shakingFelt0 reportsPrimary data sourceEMSC (European-Mediterranean Seismological Centre)Nearest volcanoOllague (42 km / 26 mi)Weather at epicenter at time of quakeClear Sky 5.2°C (41 F), humidity: 17%, wind: 3 m/s (6 kts) from WNWEstimated seismic energy released8.9 x 1010 joules (24.8 megawatt hours, equivalent to 21.3 tons of TNT) | equivalent to ONE quake of magnitude 4.1 | about seismic energy6 minutes agoOct 4, 2026 12:07 GMT / Oct 4, 2026 08:07 am (GMT -4)Lat / Lng: -21.29 / -67.77: Potosi, BoliviaSource: EMSCOther sources: CSN: 4.1 / 195 km, RaspberryShake: 4.1 / 195 kmDetail info | You felt it? - Report it!';storedMarkers.push(['quake-23410047',-21.29000,-67.77000,'6 minutes ago: Mag. 4.1, Potosi, Bolivia',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 BoliviaNearby placesThe closest larger town where the quake might have been felt is Ollagüe, a town with 134 inhabitants in Chile, in 51 km (31 mi) distance west of the epicenter. People likely experienced very weak shaking there. In the capital of Bolivia, Sucre, 363 km (225 mi) away from the epicenter, the earthquake could not be felt.The following table shows some of the places that might have been affected (or not) by the shaking.DistancePlaceMax. shaking intensity(*)RegionCountry51 km (31 mi)W of epicenterOllagüe(pop: 134)II: Very weakProvincia de El Loa, Region de AntofagastaChile57 km (35 mi)E of epicenterCulpina K(pop: 71)II: Very weakDepartamento de PotosiBolivia64 km (40 mi)E of epicenterSan Cristobal(pop: 75)I: Not feltDepartamento de PotosiBolivia135 km (84 mi)NE of epicenterUyuni(pop: 10,300)I: Not feltDepartamento de PotosiBolivia140 km (87 mi)NE of epicenterColchani(pop: 12,000)I: Not feltDepartamento de PotosiBolivia141 km (88 mi)E of epicenterPorco(pop: 5,960)I: Not feltDepartamento de PotosiBolivia166 km (103 mi)E of epicenterAtocha(pop: 1,830)I: Not feltDepartamento de PotosiBolivia176 km (109 mi)SW of epicenterCalama(pop: 166,300)I: Not feltProvincia de El Loa, Region de AntofagastaChile183 km (114 mi)E of epicenterSanta Barbara(pop: 2,430)I: Not feltDepartamento de PotosiBolivia185 km (115 mi)NW of epicenterPica(pop: 9,300)I: Not feltProvincia del Tamarugal, TarapacáChile186 km (115 mi)S of epicenterSan Pedro de Atacama(pop: 11,000)I: Not feltProvincia de El Loa, Region de AntofagastaChile213 km (132 mi)E of epicenterTupiza(pop: 22,200)I: Not feltDepartamento de PotosiBolivia225 km (140 mi)E of epicenterSantiago de Cotagaita(pop: 1,900)I: Not feltDepartamento de PotosiBolivia228 km (142 mi)SW of epicenterMaria Elena(pop: 7,530)I: Not feltProvincia de Tocopilla, Region de AntofagastaChile239 km (149 mi)NW of epicenterPozo Almonte(pop: 16,900)I: Not feltProvincia del Tamarugal, TarapacáChile239 km (149 mi)SW of epicenterSierra Gorda(pop: 1,070)I: Not feltProvincia de Antofagasta, Region de AntofagastaChile242 km (150 mi)N of epicenterColchane(pop: 1,730)I: Not feltProvincia del Tamarugal, TarapacáChile242 km (150 mi)E of epicenterVillazon(pop: 30,300)I: Not feltDepartamento de PotosiBolivia242 km (151 mi)E of epicenterLa Quiaca(pop: 14,800)I: Not feltDepartamento de Yavi, Jujuy ProvinceArgentina253 km (157 mi)NW of epicenterHuara(pop: 2,860)I: Not feltProvincia del Tamarugal, TarapacáChile266 km (165 mi)W of epicenterTocopilla(pop: 25,400)I: Not feltRegion de AntofagastaChile267 km (166 mi)SE of epicenterAbra Pampa(pop: 9,430)I: Not feltDepartamento de Cochinoca, Jujuy ProvinceArgentina268 km (167 mi)NW of epicenterAlto Hospicio(pop: 142,100)I: Not feltProvincia de Iquique, TarapacáChile275 km (171 mi)NW of epicenterIquique(pop: 199,600)I: Not feltTarapacáChile276 km (171 mi)E of epicenterCamargo(pop: 4,720)I: Not feltProvincia Nor Cinti, Departamento de ChuquisacaBolivia283 km (176 mi)NE of epicenterPotosi(pop: 141,300)I: Not feltDepartamento de PotosiBolivia285 km (177 mi)N of epicenterChallapata(pop: 8,020)I: Not feltOruroBolivia304 km (189 mi)SE of epicenterEl Aguilar(pop: 3,660)I: Not feltDepartamento de Humahuaca, Jujuy ProvinceArgentina309 km (192 mi)NE of epicenterBetanzos(pop: 4,850)I: Not feltDepartamento de PotosiBolivia316 km (196 mi)E of epicenterTarija(pop: 159,300)I: Not feltDepartamento de TarijaBolivia325 km (202 mi)N of epicenterTotoral(pop: 1,650)I: Not feltOruroBolivia328 km (204 mi)SE of epicenterHumahuaca(pop: 11,400)I: Not feltJujuy ProvinceArgentina341 km (212 mi)SW of epicenterMejillones(pop: 14,100)I: Not feltProvincia de Antofagasta, Region de AntofagastaChile342 km (213 mi)NE of epicenterColquechaca(pop: 1,710)I: Not feltDepartamento de PotosiBolivia342 km (213 mi)N of epicenterLlallagua(pop: 28,100)I: Not feltDepartamento de PotosiBolivia363 km (225 mi)NE of epicenterSucre(pop: 224,800)I: Not feltDepartamento de ChuquisacaBolivia377 km (234 mi)SW of epicenterAntofagasta(pop: 401,100)I: Not feltRegion de AntofagastaChile379 km (236 mi)NE of epicenterTarabuco(pop: 2,430)I: Not feltProvincia Yamparaez, Departamento de ChuquisacaBolivia410 km (255 mi)NW of epicenterArica(pop: 241,700)I: Not feltRegion de Arica y ParinacotaChile415 km (258 mi)SE of epicenterLibertador General San Martin(pop: 49,300)I: Not feltDepartamento de Ledesma, Jujuy ProvinceArgentinaNotes:(*) 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 GMT2026-10-4EpicenterAgency4.09195 km121 mi12:07:54POTOSI, BOLIVIAEMSC (European-Mediterranean Seismological Centre)4.1195 km121 mi12:07:5450 km al E de Ollagüe0.7 km (0.4 mi) epicenter difference with EMSCCSN (National Seismological Center (Centro Sismológico Nacional))4.1195 km121 mi12:07:54Chile-Bolivia Border Region0.7 km (0.4 mi) epicenter difference with EMSCRaspberryShake (RaspberryShake)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)Oct 4, 2026 08:07 am (GMT -4)6 minutes ago4.1195 km0 km - This quake283 km SW of Potosi, Departamento de Potosi, BoliviaMain 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 640 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 7 or higher: 0.02 quakes per year (or 1 quake every 62.5 years)Mag. 6 or higher: 0.09 quakes per year (or 1 quake every 11.5 years)Mag. 5 or higher: 2.5 quakes per yearMag. 4 or higher: 58 quakes per year (or 4.9 quakes per month)Mag. 3 or higher: 312 quakes per year (or 26 quakes per month)Mag. 2 or higher: 640 quakes per year (or 53 quakes per month)The area where this quake occurred has a very high level of seismic activity. It has had at least 2 quakes above magnitude 7 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 60 to 65 years.Number of quakes per yearPrevious quakes in the same area of this earthquake