Light magnitude 3.9 earthquake at 119 km depth28 Oct 07:56 UTC: First to report: EMSC after 3 minutes.28 Oct 07:59: Hypocenter depth recalculated from 111.90 to 118.70 km (from 70 to 74 mi). Epicenter location corrected by 2.2 km (1.4 mi) towards WNW.I didn't feel itI felt this quakeEarthquake detailsDate & timeOct 28, 2026 07:52:46 UTC - Local time at epicenterWednesday, Oct 28, 2026, at 04:52 am (GMT -3)Statusconfirmed (manually revised)Magnitude3.90Depth119 kmEpicenter latitude / longitude28.88°S / 69.79°WHuasco, Region de Atacama, ChileAlso near: Argentina 3.3 km (2 mi) awaySeismic antipode28.88°N / 110.21°EChinaShaking intensityII Very weak shakingFelt0 reportsPrimary data sourceEMSC (European-Mediterranean Seismological Centre)Nearest volcanoTipas (223 km / 139 mi)Weather at epicenter at time of quakeOvercast Clouds -7.1°C (19 F), humidity: 48%, wind: 1 m/s (3 kts) from NEstimated 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 energy17 minutes agoOct 28, 2026 07:52 GMT / Oct 28, 2026 04:52 am (GMT -3)Lat / Lng: -28.88 / -69.79: Atacama, ChileSource: EMSCOther sources: RaspberryShake: 3.9 / 119 km, CSN: 3.9 / 119 kmDetail info | You felt it? - Report it!';storedMarkers.push(['quake-23470249',-28.88000,-69.79000,'17 minutes ago: Mag. 3.9, Atacama, Chile',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 ChileNearby placesThe closest larger town where the quake might have been felt is Alto del Carmen, a town with 5,000 inhabitants in Chile, in 69 km (43 mi) distance west of the epicenter. People likely experienced very weak shaking there. In the capital of Chile, Santiago, 516 km (320 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(*)RegionCountry69 km (43 mi)W of epicenterAlto del Carmen(pop: 5,030)II: Very weakHuasco, Region de AtacamaChile100 km (62 mi)W of epicenterVallenar(pop: 44,900)II: Very weakHuasco, Region de AtacamaChile133 km (82 mi)W of epicenterFreirina(pop: 6,040)I: Not feltHuasco, Region de AtacamaChile146 km (91 mi)SW of epicenterPaiguano(pop: 4,260)I: Not feltProvincia de Elqui, Region de CoquimboChile147 km (91 mi)W of epicenterHuasco(pop: 8,980)I: Not feltRegion de AtacamaChile154 km (96 mi)SW of epicenterLa Higuera(pop: 4,290)I: Not feltProvincia de Elqui, Region de CoquimboChile155 km (96 mi)E of epicenterVinchina(pop: 2,830)I: Not feltLa Rioja ProvinceArgentina157 km (97 mi)SW of epicenterVicuna(pop: 27,800)I: Not feltProvincia de Elqui, Region de CoquimboChile164 km (102 mi)N of epicenterTierra Amarilla(pop: 12,900)I: Not feltCopiapo, Region de AtacamaChile176 km (110 mi)N of epicenterCopiapo(pop: 129,300)I: Not feltCopiapo, Region de AtacamaChile182 km (113 mi)SW of epicenterLa Serena(pop: 154,500)I: Not feltProvincia de Elqui, Region de CoquimboChile182 km (113 mi)SE of epicenterSan Jose de Jachal(pop: 21,000)I: Not feltDepartamento de Jachal, San Juan ProvinceArgentina192 km (119 mi)SW of epicenterCoquimbo(pop: 161,300)I: Not feltProvincia de Elqui, Region de CoquimboChile196 km (122 mi)SW of epicenterAndacollo(pop: 11,100)I: Not feltProvincia de Elqui, Region de CoquimboChile235 km (146 mi)SW of epicenterOvalle(pop: 77,100)I: Not feltProvincia de Limari, Region de CoquimboChile516 km (320 mi)S of epicenterSantiago(pop: 4,837,300): Not feltSantiago MetropolitanChileNotes:(*) 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 GMT2026-10-28EpicenterAgency3.9119 km74 mi07:52:46ATACAMA, CHILEEMSC (European-Mediterranean Seismological Centre)3.9119 km74 mi07:52:46Chile-Argentina Border Region0 km (0 mi) epicenter difference with EMSCRaspberryShake (RaspberryShake)3.9119 km74 mi07:52:4669 km al E de Alto del Carmen0 km (0 mi) epicenter difference with EMSCCSN (National Seismological Center (Centro Sismológico Nacional))Earthquake statisticsAverage number of earthquakesBased on data from the past 56 years and our earthquake archive back to 1900, there are about 156 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 6 or higher: 0.02 quakes per year (or 1 quake every 62.5 years)Mag. 5 or higher: 0.5 quakes per year (or 1 quake every 2 years)Mag. 4 or higher: 10.1 quakes per yearMag. 3 or higher: 66 quakes per year (or 5.5 quakes per month)Mag. 2 or higher: 156 quakes per year (or 13 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 6 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