Light magnitude 3.9 earthquake at 223 km depth4 Aug 05:22 UTC: First to report: EMSC after 6 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeAug 4, 2026 05:16:13 UTC - Local time at epicenterTuesday, Aug 4, 2026, at 02:16 am (America/Santiago GMT -3)Statusconfirmed (manually revised)Magnitude3.90Depth223 kmEpicenter latitude / longitude23.88°S / 67.41°WProvincia de El Loa, Region de Antofagasta, ChileAlso near: Argentina 11.9 km (7 mi) awaySeismic antipode23.88°N / 112.59°EChinaShaking intensityNot feltPrimary data sourceEMSC (European-Mediterranean Seismological Centre)Nearest volcanoCordon de Puntas Negras (20 km / 12 mi)Weather at epicenter at time of quakeClear Sky 0.9°C (34 F), humidity: 21%, wind: 3 m/s (5 kts) from WNWEstimated 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 energy22 minutes agoAug 4, 2026 05:16 GMT / Aug 4, 2026 02:16 am (Santiago time)Lat / Lng: -23.88 / -67.41: Antofagasta, ChileSource: EMSCOther sources: RaspberryShake: 3.9 / 223 km, CSN: 3.9 / 223 kmDetail info | You felt it? - Report it!';storedMarkers.push(['quake-23242669',-23.88000,-67.41000,'22 minutes ago: Mag. 3.9, Antofagasta, 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 near the epicenter is San Antonio de los Cobres, a town with 4,000 inhabitants in Argentina, in 117 km (73 mi) distance to the east, but it is unlikely that the quake was felt there. DistancePlaceMax. shaking intensity(*)RegionCountry117 km (73 mi)E of epicenterSan Antonio de los Cobres(pop: 4,000)I: Not feltDepartamento de Los Andes, Salta ProvinceArgentina119 km (74 mi)NE of epicenterSusques(pop: 1,140)I: Not feltJujuy ProvinceArgentina135 km (84 mi)NW of epicenterSan Pedro de Atacama(pop: 11,000)I: Not feltProvincia de El Loa, Region de AntofagastaChile161 km (100 mi)SE of epicenterSanta Rosa de Tastil(pop: 2,000)I: Not feltDepartamento de Rosario de Lerma, Salta ProvinceArgentina187 km (116 mi)SE of epicenterCachi(pop: 2,190)I: Not feltSalta ProvinceArgentina191 km (119 mi)E of epicenterEl Aguilar(pop: 3,660)I: Not feltDepartamento de Humahuaca, Jujuy ProvinceArgentina195 km (121 mi)E of epicenterPurmamarca(pop: 388)I: Not feltDepartamento de Tumbaya, Jujuy ProvinceArgentina208 km (129 mi)E of epicenterTilcara(pop: 5,640)I: Not feltJujuy ProvinceArgentina213 km (132 mi)SE of epicenterCampo Quijano(pop: 5,000)I: Not feltDepartamento de Rosario de Lerma, Salta ProvinceArgentina217 km (135 mi)NE of epicenterAbra Pampa(pop: 9,430)I: Not feltDepartamento de Cochinoca, Jujuy ProvinceArgentina218 km (135 mi)E of epicenterSan Salvador de Jujuy(pop: 258,000)I: Not feltDepartamento de Doctor Manuel Belgrano, Jujuy ProvinceArgentina221 km (138 mi)NW of epicenterCalama(pop: 166,300)I: Not feltProvincia de El Loa, Region de AntofagastaChile223 km (139 mi)E of epicenterHumahuaca(pop: 11,400)I: Not feltJujuy ProvinceArgentina224 km (139 mi)NW of epicenterSierra Gorda(pop: 1,070)I: Not feltProvincia de Antofagasta, Region de AntofagastaChile226 km (141 mi)SE of epicenterSalta(pop: 520,700)I: Not feltDepartamento Capital, Salta ProvinceArgentina227 km (141 mi)E of epicenterPalpala(pop: 48,200)I: Not feltDepartamento de Palpala, Jujuy ProvinceArgentina235 km (146 mi)SE of epicenterEl Carril(pop: 9,780)I: Not feltDepartamento de Chicoana, Salta ProvinceArgentina242 km (151 mi)S of epicenterAntofagasta de la Sierra(pop: 500)I: Not feltCatamarca ProvinceArgentina253 km (157 mi)E of epicenterLa Mendieta(pop: 3,810)I: Not feltDepartamento de San Pedro, Jujuy ProvinceArgentina255 km (159 mi)W of epicenterBaquedano(pop: 858)I: Not feltProvincia de Antofagasta, Region de AntofagastaChile261 km (162 mi)E of epicenterSan Pedro de Jujuy(pop: 58,400)I: Not feltDepartamento de San Pedro, Jujuy ProvinceArgentina265 km (165 mi)E of epicenterFraile Pintado(pop: 13,700)I: Not feltDepartamento de Ledesma, Jujuy ProvinceArgentina266 km (165 mi)E of epicenterLibertador General San Martin(pop: 49,300)I: Not feltDepartamento de Ledesma, Jujuy ProvinceArgentina271 km (168 mi)NE of epicenterLa Quiaca(pop: 14,800)I: Not feltDepartamento de Yavi, Jujuy ProvinceArgentina273 km (169 mi)NE of epicenterVillazon(pop: 30,300)I: Not feltDepartamento de PotosiBolivia283 km (176 mi)E of epicenterSanta Clara(pop: 4,880)I: Not feltDepartamento de Santa Barbara, Jujuy ProvinceArgentina283 km (176 mi)SE of epicenterCafayate(pop: 11,800)I: Not feltSalta ProvinceArgentina287 km (178 mi)NW of epicenterMaria Elena(pop: 7,530)I: Not feltProvincia de Tocopilla, Region de AntofagastaChile305 km (190 mi)W of epicenterAntofagasta(pop: 401,100)I: Not feltRegion de AntofagastaChile322 km (200 mi)NE of epicenterTupiza(pop: 22,200)I: Not feltDepartamento de PotosiBolivia330 km (205 mi)NW of epicenterQuillagua(pop: 141)I: Not feltProvincia de Tocopilla, Region de AntofagastaChile338 km (210 mi)SE of epicenterTrancas(pop: 6,660)I: Not feltTucuman ProvinceArgentina379 km (235 mi)NE of epicenterTarija(pop: 159,300)I: Not feltDepartamento de TarijaBolivia385 km (239 mi)SW of epicenterDiego de Almagro(pop: 13,900): Not feltChanaral, Region de AtacamaChileNotes:(*) 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 GMT2026-08-4EpicenterAgency3.9223 km139 mi05:16:13ANTOFAGASTA, CHILEEMSC (European-Mediterranean Seismological Centre)3.9223 km139 mi05:16:13Chile-Argentina Border Region0.4 km (0.2 mi) epicenter difference with EMSCRaspberryShake (RaspberryShake)3.9223 km139 mi05:16:1358 km al SE de Socaire0.4 km (0.2 mi) epicenter difference with EMSCCSN (National Seismological Center (Centro Sismológico Nacional))Earthquake statisticsAverage number of earthquakesBased on data from the past 26 years and our earthquake archive back to 1900, there are about 1,100 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 6 or higher: 0.28 quakes per year (or 1 quake every 3.6 years)Mag. 5 or higher: 3.7 quakes per yearMag. 4 or higher: 140 quakes per year (or 11.6 quakes per month)Mag. 3 or higher: 893 quakes per year (or 74 quakes per month)Mag. 2 or higher: 1,100 quakes per year (or 3.1 quakes per day)The area where this quake occurred has a very high level of seismic activity. It has had at least 16 quakes above magnitude 6 since 1970, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 1 to 5 years.Number of quakes per yearPrevious quakes in the same area of this earthquake