Moderate magnitude 4.0 earthquake at 127 km depth15 Sep 23:24 UTC: First to report: EMSC after 3 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeSep 15, 2025 23:21:45 UTC - Local time at epicenterMonday, Sep 15, 2025, at 08:21 pm (GMT -3)Statuspreliminary (automatic detection)Magnitude4.0Depth127 kmEpicenter latitude / longitude21.65°S / 68.56°WProvincia de El Loa, Region de Antofagasta, ChileAlso near: Bolivia 39 km (24 mi) awaySeismic antipode21.65°N / 111.44°EChinaShaking intensityII Very weak shakingFelt0 reportsPrimary data sourceEMSC (European-Mediterranean Seismological Centre)Nearest volcanoSan Pedro (30 km / 19 mi)Weather at epicenter at time of quakeClear Sky 9.4°C (49 F), humidity: 9%, wind: 3 m/s (7 kts) from SSWEstimated 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 agoSep 15, 2025 23:21 GMT / Sep 15, 2025 08:21 pm (GMT -3)Lat / Lng: -21.65 / -68.56: Antofagasta, ChileSource: EMSCDetail info | You felt it? - Report it!';storedMarkers.push(['quake-22170747',-21.65000,-68.56000,'4 minutes ago: Mag. 4.0, Antofagasta, 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 Ollagüe, a town with 134 inhabitants in Chile, in 57 km (35 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(*)RegionCountry57 km (35 mi)NE of epicenterOllagüe(pop: 134)II: Very weakProvincia de El Loa, Region de AntofagastaChile95 km (59 mi)NW of epicenterHuatacondo(pop: 55)II: Very weakProvincia del Tamarugal, TarapacáChile97 km (60 mi)S of epicenterCalama(pop: 165,700)II: Very weakProvincia de El Loa, Region de AntofagastaChile101 km (63 mi)W of epicenterQuillagua(pop: 141)II: Very weakProvincia de Tocopilla, Region de AntofagastaChile137 km (85 mi)SW of epicenterMaria Elena(pop: 4,900)I: Not feltProvincia de Tocopilla, Region de AntofagastaChile145 km (90 mi)S of epicenterSan Pedro de Atacama(pop: 2,000)I: Not feltProvincia de El Loa, Region de AntofagastaChile152 km (94 mi)NW of epicenterPica(pop: 9,300)I: Not feltProvincia del Tamarugal, TarapacáChile152 km (95 mi)NW of epicenterOficina Victoria(pop: 83)I: Not feltProvincia del Tamarugal, TarapacáChile155 km (96 mi)NW of epicenterColonia Pintados(pop: 143)I: Not feltProvincia del Tamarugal, TarapacáChile159 km (99 mi)SW of epicenterSierra Gorda(pop: 477)I: Not feltProvincia de Antofagasta, Region de AntofagastaChile162 km (101 mi)W of epicenterCaleta Chipana(pop: 84)I: Not feltProvincia de Iquique, TarapacáChile176 km (109 mi)W of epicenterTocopilla(pop: 24,500)I: Not feltRegion de AntofagastaChile181 km (113 mi)NW of epicenterRio Seco(pop: 145)I: Not feltProvincia de Iquique, TarapacáChile185 km (115 mi)NW of epicenterLa Tirana(pop: 1,530)I: Not feltProvincia del Tamarugal, TarapacáChile188 km (117 mi)N of epicenterMamiña(pop: 319)I: Not feltProvincia del Tamarugal, TarapacáChile199 km (124 mi)NW of epicenterChanavayita(pop: 603)I: Not feltProvincia de Iquique, TarapacáChile201 km (125 mi)NW of epicenterPozo Almonte(pop: 15,700)I: Not feltProvincia del Tamarugal, TarapacáChile209 km (130 mi)NW of epicenterBaquedano(pop: 587)I: Not feltProvincia del Tamarugal, TarapacáChile214 km (133 mi)NW of epicenterLos Verdes(pop: 216)I: Not feltProvincia de Iquique, TarapacáChile222 km (138 mi)NW of epicenterAlto Hospicio(pop: 108,400)I: Not feltProvincia de Iquique, TarapacáChile223 km (139 mi)NW of epicenterHuara(pop: 2,730)I: Not feltProvincia del Tamarugal, TarapacáChile223 km (139 mi)NE of epicenterUyuni(pop: 10,300)I: Not feltDepartamento de PotosiBolivia226 km (140 mi)NE of epicenterColchani(pop: 12,000)I: Not feltDepartamento de PotosiBolivia229 km (142 mi)SW of epicenterBaquedano(pop: 858)I: Not feltProvincia de Antofagasta, Region de AntofagastaChile230 km (143 mi)NW of epicenterIquique(pop: 191,500)I: Not feltTarapacáChile252 km (157 mi)SW of epicenterMejillones(pop: 12,800)I: Not feltProvincia de Antofagasta, Region de AntofagastaChile255 km (159 mi)E of epicenterAtocha(pop: 1,830)I: Not feltDepartamento de PotosiBolivia264 km (164 mi)N of epicenterColchane(pop: 1,730)I: Not feltProvincia del Tamarugal, TarapacáChile273 km (169 mi)E of epicenterSanta Barbara(pop: 2,430)I: Not feltDepartamento de PotosiBolivia275 km (171 mi)N of epicenterCamina(pop: 1,250)I: Not feltProvincia del Tamarugal, TarapacáChile292 km (181 mi)SW of epicenterAntofagasta(pop: 352,600)I: Not feltRegion de AntofagastaChile295 km (183 mi)E of epicenterTupiza(pop: 22,200)I: Not feltDepartamento de PotosiBolivia310 km (193 mi)E of epicenterVillazon(pop: 30,300)I: Not feltDepartamento de PotosiBolivia310 km (193 mi)E of epicenterLa Quiaca(pop: 14,800)I: Not feltDepartamento de Yavi, Jujuy ProvinceArgentina318 km (198 mi)E of epicenterAbra Pampa(pop: 9,430)I: Not feltDepartamento de Cochinoca, Jujuy ProvinceArgentina344 km (213 mi)SE of epicenterEl Aguilar(pop: 3,660)I: Not feltDepartamento de Humahuaca, Jujuy ProvinceArgentina358 km (223 mi)NE of epicenterChallapata(pop: 8,020)I: Not feltOruroBolivia367 km (228 mi)SE of epicenterSan Antonio de los Cobres(pop: 4,000)I: Not feltDepartamento de Los Andes, Salta ProvinceArgentina372 km (231 mi)NE of epicenterPotosi(pop: 141,300)I: Not feltDepartamento de PotosiBolivia410 km (255 mi)SE of epicenterSanta Rosa de Tastil(pop: 2,000)I: Not feltDepartamento de Rosario de Lerma, Salta 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!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 GMT2025-09-15EpicenterAgency4.0127 km79 mi23:21:45ANTOFAGASTA, CHILEEMSC (European-Mediterranean Seismological Centre)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)Sep 15, 2025 08:21 pm (GMT -3)4 minutes ago4.0127 km0 km - This quake97 km N of Calama, Provincia de El Loa, Region de Antofagasta, ChileMain Shock (this quake)MoreMap of aftershocksEarthquake statisticsAverage number of earthquakesBased on data from the past 25 years and our earthquake archive back to 1900, there are about 1,500 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 7 or higher: 0.03 quakes per year (or 1 quake every 31.3 years)Mag. 6 or higher: 0.28 quakes per year (or 1 quake every 3.5 years)Mag. 5 or higher: 4.6 quakes per yearMag. 4 or higher: 95 quakes per year (or 8 quakes per month)Mag. 3 or higher: 623 quakes per year (or 52 quakes per month)Mag. 2 or higher: 1,500 quakes per year (or 4 quakes per day)Mag. 1 or higher: 1,500 quakes per year (or 4 quakes per day)The area where this quake occurred has a very high level of seismic activity. It has had at least 4 quakes above magnitude 7 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 30 to 35 years.Number of quakes per yearPrevious quakes in the same area of this earthquake