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The quake had a moderate depth of 140 km (87 mi) and was not felt (or at least not reported so).Quake Data | Interactive map | Seismograms | User reports | Aftershocks | Earlier quakes here | Quakes in Chile | Quakes in Argentina | Region de Atacama | La Rioja Province | Catamarca ProvinceHint: Click on the image to see different maps of this quake!Moderate magnitude 4.0 earthquake at 140 km depth29 Jul 09:08 UTC: First to report: EMSC after 4 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeJul 29, 2026 09:04:19 UTC - Local time at epicenterWednesday, Jul 29, 2026, at 09:04 am (Universal Time GMT +0)Statuspreliminary (automatic detection)Magnitude4.00Depth140 kmEpicenter latitude / longitude27.99°S / 69.42°WCopiapo, Region de Atacama, ChileAlso near: Argentina 11.4 km (7 mi) awaySeismic antipode27.99°N / 110.58°EShaking intensityII Very weak shakingFelt0 reportsPrimary data sourceEMSC (European-Mediterranean Seismological Centre)Nearest volcanoIncapillo (62 km / 39 mi)Estimated seismic energy released6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 tons of TNT) | equivalent to ONE quake of magnitude 4.0 | about seismic energy4 minutes agoJul 29, 2026 09:04 GMT / Jul 29, 2026 09:04 am (Universal Time)Lat / Lng: -27.99 / -69.42: Atacama, ChileSource: EMSCDetail info | You felt it? - Report it!';storedMarkers.push(['quake-23226023',-27.99000,-69.42000,'4 minutes ago: Mag. 4.0, Atacama, Chile',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 ChileNearby placesThe closest larger town where the quake might have been felt is Tierra Amarilla, a town with 13,000 inhabitants in Chile, in 101 km (63 mi) distance northwest of the epicenter. People likely experienced very weak shaking there. In the capital of Chile, Santiago, 619 km (385 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(*)RegionCountry101 km (63 mi)NW of epicenterTierra Amarilla(pop: 12,900)II: Very weakCopiapo, Region de AtacamaChile113 km (70 mi)NW of epicenterCopiapo(pop: 129,300)II: Very weakCopiapo, Region de AtacamaChile135 km (84 mi)SW of epicenterAlto del Carmen(pop: 5,030)I: Not feltHuasco, Region de AtacamaChile146 km (91 mi)SE of epicenterVinchina(pop: 2,830)I: Not feltLa Rioja ProvinceArgentina146 km (91 mi)SW of epicenterVallenar(pop: 44,900)I: Not feltHuasco, Region de AtacamaChile172 km (107 mi)NW of epicenterCaldera(pop: 16,200)I: Not feltCopiapo, Region de AtacamaChile173 km (107 mi)W of epicenterFreirina(pop: 6,040)I: Not feltHuasco, Region de AtacamaChile181 km (112 mi)E of epicenterFiambala(pop: 8,060)I: Not feltDepartamento de Tinogasta, Catamarca ProvinceArgentina182 km (113 mi)E of epicenterTinogasta(pop: 14,500)I: Not feltCatamarca ProvinceArgentina184 km (115 mi)W of epicenterHuasco(pop: 8,980)I: Not feltRegion de AtacamaChile188 km (117 mi)N of epicenterDiego de Almagro(pop: 13,900)I: Not feltChanaral, Region de AtacamaChile227 km (141 mi)E of epicenterLondres(pop: 2,630)I: Not feltDepartamento de Belen, Catamarca ProvinceArgentina228 km (142 mi)SE of epicenterChilecito(pop: 42,200)I: Not feltLa Rioja ProvinceArgentina243 km (151 mi)SW of epicenterLa Higuera(pop: 4,290)I: Not feltProvincia de Elqui, Region de CoquimboChile243 km (151 mi)E of epicenterPuerta de San Jose(pop: 1,070)I: Not feltDepartamento de Belen, Catamarca ProvinceArgentina251 km (156 mi)SW of epicenterPaiguano(pop: 4,260)I: Not feltProvincia de Elqui, Region de CoquimboChile259 km (161 mi)S of epicenterSan Jose de Jachal(pop: 21,000)I: Not feltDepartamento de Jachal, San Juan ProvinceArgentina260 km (161 mi)SW of epicenterVicuna(pop: 27,800)I: Not feltProvincia de Elqui, Region de CoquimboChile264 km (164 mi)E of epicenterAimogasta(pop: 16,600)I: Not feltDepartamento de Arauco, La Rioja ProvinceArgentina266 km (165 mi)E of epicenterArauco(pop: 13,700)I: Not feltLa Rioja ProvinceArgentina269 km (167 mi)E of epicenterHualfin(pop: 2,300)I: Not feltDepartamento de Belen, Catamarca ProvinceArgentina275 km (171 mi)SE of epicenterVilla Bustos(pop: 2,170)I: Not feltDepartamento de Sanagasta, La Rioja ProvinceArgentina278 km (173 mi)SW of epicenterLa Serena(pop: 154,500)I: Not feltProvincia de Elqui, Region de CoquimboChile287 km (179 mi)SW of epicenterCoquimbo(pop: 161,300)I: Not feltProvincia de Elqui, Region de CoquimboChile293 km (182 mi)NE of epicenterAntofagasta de la Sierra(pop: 500)I: Not feltCatamarca ProvinceArgentina296 km (184 mi)SE of epicenterLa Rioja(pop: 178,900)I: Not feltDepartamento de Capital, La Rioja ProvinceArgentina297 km (185 mi)SW of epicenterAndacollo(pop: 11,100)I: Not feltProvincia de Elqui, Region de CoquimboChile306 km (190 mi)N of epicenterTaltal(pop: 11,100)I: Not feltProvincia de Antofagasta, Region de AntofagastaChile309 km (192 mi)E of epicenterAndalgala(pop: 14,100)I: Not feltDepartamento de Andalgala, Catamarca ProvinceArgentina317 km (197 mi)E of epicenterPoman(pop: 3,390)I: Not feltDepartamento de Poman, Catamarca ProvinceArgentina336 km (209 mi)SW of epicenterMonte Patria(pop: 13,900)I: Not feltProvincia de Limari, Region de CoquimboChile338 km (210 mi)SW of epicenterOvalle(pop: 77,100)I: Not feltProvincia de Limari, Region de CoquimboChile350 km (217 mi)SE of epicenterVilla San Agustin(pop: 6,860)I: Not feltValle Fertil, San Juan ProvinceArgentina363 km (226 mi)SW of epicenterPunitaqui(pop: 10,400)I: Not feltProvincia de Limari, Region de CoquimboChile400 km (249 mi)SE of epicenterChamical(pop: 13,400)I: Not feltLa Rioja ProvinceArgentina455 km (283 mi)NE of epicenterCachi(pop: 2,190)I: Not feltSalta ProvinceArgentina619 km (385 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 GMT2026-07-29EpicenterAgency4.0140 km87 mi09:04:19ATACAMA, CHILEEMSC (European-Mediterranean Seismological Centre)"; HTMLcontent += ""; mainMap.addToMap("station"+id, lat, lon, title,HTMLcontent); mainMap.map.panTo([lat,lon]); document.getElementById("map_canvas").scrollIntoView();}]]>SeismogramsSeismic station: Copiapo (Tierra Amarilla), Chile (GO03/C network) | Distance from quake: 91 km / 57 mi | Show on map | Station InfoSeismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Bandpass filter applied: 0.2-5.0 Hz. Source: NSF SAGE Facility IRISWS timeseriesplot Web ServiceSeismic station: Copiapo, Mina Casimiro Domeyko (AC06/C1 network) | Distance from quake: 116 km / 72 mi | Show on map | Station InfoShow moreAftershocks 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)Jul 29, 2026 09:04 am (Universal Time)4 minutes ago4.0140 km0 km - This quakeCopiapo, Region de Atacama, ChileMain Shock (this quake)MoreMap of aftershocksEarthquake statisticsAverage number of earthquakesBased on data from the past 56 years and our earthquake archive back to 1900, there are about 151 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 5 or higher: 0.68 quakes per year (or 1 quake every 1.5 years)Mag. 4 or higher: 9.6 quakes per yearMag. 3 or higher: 65 quakes per year (or 5.5 quakes per month)Mag. 2 or higher: 151 quakes per year (or 12.6 quakes per month)The area where this quake occurred has a very high level of seismic activity. It has had at least 39 quakes above magnitude 5 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