Moderate magnitude 4.3 earthquake at 125 km depth27 Oct 11:24 UTC: First to report: INPRES after 4 minutes.27 Oct 11:30: Now using data updates from EMSCI didn't feel itI felt this quakeEarthquake detailsDate & timeOct 27, 2026 11:19:38 UTC - Local time at epicenterTuesday, Oct 27, 2026, at 08:19 am (America/Argentina/San Juan GMT -3)StatusconfirmedMagnitude4.30Depth125 kmEpicenter latitude / longitude31.8°S / 69.48°WDepartamento de Calingasta, San Juan Province, ArgentinaAlso near: Chile 73 km (45 mi) awaySeismic antipode31.8°N / 110.52°EChinaShaking intensityII Very weak shakingFelt0 reportsPrimary data sourceEMSC (European-Mediterranean Seismological Centre)Nearest volcanoTupungatito (183 km / 114 mi)Weather at epicenter at time of quakeClear Sky 6.9°C (44 F), humidity: 33%, wind: 2 m/s (3 kts) from SSWEstimated seismic energy released1.8 x 1011 joules (49.4 megawatt hours, equivalent to 42.5 tons of TNT) | equivalent to ONE quake of magnitude 4.3 | about seismic energy16 minutes agoOct 27, 2026 11:19 GMT / Oct 27, 2026 08:19 am (San Juan time)Lat / Lng: -31.8 / -69.48: San Juan, ArgentinaSource: EMSCOther sources: INPRES: 4.3 / 125 kmDetail info | You felt it? - Report it!';storedMarkers.push(['quake-23468196',-31.80000,-69.48000,'16 minutes ago: Mag. 4.3, San Juan, Argentina',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 ArgentinaNearby placesThe closest larger town where the quake might have been felt is Pocito, a town with 41,000 inhabitants in Argentina, in 86 km (53 mi) distance east of the epicenter. People likely experienced very weak shaking there. Several smaller towns and villages are located closer to the epicenter and might have experienced stronger shaking. In the capital of Chile, Santiago, 214 km (133 mi) away from the epicenter, the earthquake was probably felt as very weak shaking.The following table shows some of the places that might have been affected (or not) by the shaking.DistancePlaceMax. shaking intensity(*)RegionCountry52 km (32 mi)N of epicenterCalingasta(pop: 8,180)II: Very weakSan Juan ProvinceArgentina76 km (47 mi)E of epicenterVilla Basilio Nievas(pop: 4,040)II: Very weakDepartamento de Zonda, San Juan ProvinceArgentina86 km (53 mi)E of epicenterPocito(pop: 41,000)II: Very weakSan Juan ProvinceArgentina95 km (59 mi)E of epicenterSan Juan(pop: 109,100)II: Very weakDepartamento de Capital, San Juan ProvinceArgentina96 km (59 mi)E of epicenterVilla Paula de Sarmiento(pop: 19,100)II: Very weakDepartamento de Chimbas, San Juan ProvinceArgentina96 km (60 mi)E of epicenterChimbas(pop: 73,800)II: Very weakSan Juan ProvinceArgentina97 km (60 mi)E of epicenterSanta Lucia(pop: 43,600)II: Very weakDepartamento de Santa Lucia, San Juan ProvinceArgentina99 km (61 mi)NE of epicenterAlbardon(pop: 20,400)II: Very weakDepartamento de Albardon, San Juan ProvinceArgentina99 km (62 mi)NE of epicenterVilla General San Martin(pop: 10,100)II: Very weakDepartamento de San Martin, San Juan ProvinceArgentina104 km (65 mi)E of epicenterNueve de Julio(pop: 7,650)II: Very weakSan Juan ProvinceArgentina115 km (71 mi)E of epicenterCaucete(pop: 33,600)II: Very weakSan Juan ProvinceArgentina135 km (84 mi)SE of epicenterMendoza(pop: 114,900)II: Very weakDepartamento de Guaymallen, Mendoza ProvinceArgentina148 km (92 mi)SW of epicenterPutaendo(pop: 15,400)II: Very weakSan Felipe de Aconcagua, Region de ValparaisoChile156 km (97 mi)SW of epicenterLos Andes(pop: 63,000)II: Very weakRegion de ValparaisoChile158 km (98 mi)SW of epicenterSan Felipe(pop: 59,300)II: Very weakRegion de ValparaisoChile171 km (106 mi)SE of epicenterSan Martin(pop: 82,500)II: Very weakDepartamento de San Martin, Mendoza ProvinceArgentina180 km (112 mi)SW of epicenterLa Ligua(pop: 32,100)II: Very weakPetorca, Region de ValparaisoChile187 km (116 mi)N of epicenterSan Jose de Jachal(pop: 21,000)II: Very weakDepartamento de Jachal, San Juan ProvinceArgentina192 km (119 mi)SW of epicenterColina(pop: 146,200)II: Very weakChacabuco, Santiago MetropolitanChile195 km (121 mi)SW of epicenterLa Calera(pop: 50,200)II: Very weakQuillota, Region de ValparaisoChile197 km (122 mi)SW of epicenterHacienda La Calera(pop: 49,100)II: Very weakQuillota, Region de ValparaisoChile205 km (128 mi)SW of epicenterQuillota(pop: 67,800)II: Very weakRegion de ValparaisoChile209 km (130 mi)SW of epicenterQuilicura(pop: 210,400)II: Very weakSantiago, Santiago MetropolitanChile210 km (131 mi)SW of epicenterPenalolen(pop: 241,600)II: Very weakSantiago, Santiago MetropolitanChile211 km (131 mi)SW of epicenterLampa(pop: 102,200)II: Very weakChacabuco, Santiago MetropolitanChile211 km (131 mi)NW of epicenterOvalle(pop: 77,100)II: Very weakProvincia de Limari, Region de CoquimboChile212 km (132 mi)SW of epicenterRenca(pop: 147,200)II: Very weakSantiago, Santiago MetropolitanChile214 km (133 mi)SW of epicenterSantiago(pop: 4,837,300)II: Very weakSantiago MetropolitanChile217 km (135 mi)SW of epicenterLo Prado(pop: 104,300)II: Very weakSantiago, Santiago MetropolitanChile225 km (140 mi)SW of epicenterMaipu(pop: 503,600)II: Very weakSantiago, Santiago MetropolitanChile226 km (140 mi)SW of epicenterVilla Alemana(pop: 97,300)II: Very weakMarga Marga, Region de ValparaisoChile226 km (140 mi)SW of epicenterLa Pintana(pop: 201,200)II: Very weakSantiago, Santiago MetropolitanChile226 km (141 mi)SW of epicenterPuente Alto(pop: 568,100)II: Very weakCordillera, Santiago MetropolitanChile230 km (143 mi)SW of epicenterSan Bernardo(pop: 249,900)I: Not feltMaipo, Santiago MetropolitanChile231 km (143 mi)SW of epicenterQuilpue(pop: 130,300)I: Not feltMarga Marga, Region de ValparaisoChile238 km (148 mi)SW of epicenterVina del Mar(pop: 334,200)I: Not feltValparaiso, Region de ValparaisoChile244 km (152 mi)SW of epicenterValparaiso(pop: 282,400)I: Not feltValparaiso, Region de ValparaisoChile270 km (168 mi)NW of epicenterLa Serena(pop: 154,500)I: Not feltProvincia de Elqui, Region de CoquimboChile339 km (211 mi)SE of epicenterSan Luis(pop: 169,900)I: Not feltJuan Martin de Pueyrredon, San Luis ProvinceArgentina365 km (227 mi)NE of epicenterLa Rioja(pop: 178,900)I: Not feltDepartamento de Capital, La Rioja 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 GMT2026-10-27EpicenterAgency4.3125 km78 mi11:19:38SAN JUAN, ARGENTINAEMSC (European-Mediterranean Seismological Centre)4.3125 km78 mi11:19:38SAN JUAN0 km (0 mi) epicenter difference with EMSCINPRESAftershocks 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 2 km2 (1 square miles) as a first-order estimate. The length of the rupture zone thus was probably around 2 km (2 mi).[More info]Recorded aftershocks, latest first (0 quake)Oct 27, 2026 08:19 am (San Juan)16 minutes ago4.3125 km0 km - This quakeDepartamento de Calingasta, 95 km W of San Juan, Departamento de Capital, San Juan Province, ArgentinaMain 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 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: 0.05 quakes per year (or 1 quake every 21.3 years)Mag. 5 or higher: 1.17 quakes per yearMag. 4 or higher: 28.6 quakes per yearMag. 3 or higher: 345 quakes per year (or 28.7 quakes per month)Mag. 2 or higher: 1,100 quakes per year (or 3.1 quakes per day)Mag. 1 or higher: 1,100 quakes per year (or 3.1 quakes per day)The area where this quake occurred has a high level of seismic activity. It has had at least 6 quakes above magnitude 6 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 20 to 25 years.Number of quakes per yearPrevious quakes in the same area of this earthquake