Moderate magnitude 4.1 earthquake at 122 km depth17 Aug 02:28 UTC: First to report: INPRES after 7 minutes.17 Aug 02:29: Now using data updates from EMSCI didn't feel itI felt this quakeEarthquake detailsDate & timeAug 17, 2026 02:21:24 UTC - Local time at epicenterSunday, Aug 16, 2026, at 11:21 pm (America/Argentina/San Juan GMT -3)StatusconfirmedMagnitude4.09Depth122 kmEpicenter latitude / longitude31.26°S / 68.53°WDepartamento de Albardon, San Juan Province, ArgentinaSeismic antipode31.26°N / 111.47°EShaking intensityII Very weak shakingFelt0 reportsPrimary data sourceEMSC (European-Mediterranean Seismological Centre)Weather at epicenter at time of quakeClear Sky 8.4°C (47 F), humidity: 56%, wind: 4 m/s (7 kts) from SSWEstimated seismic energy released8.9 x 1010 joules (24.8 megawatt hours, equivalent to 21.3 tons of TNT) | equivalent to ONE quake of magnitude 4.1 | about seismic energy16 minutes ago reported feltAug 17, 2026 02:21 GMT / Aug 16, 2026 11:21 pm (San Juan time)Lat / Lng: -31.26 / -68.53: San Juan, ArgentinaSource: EMSCOther sources: INPRES: 4.1 / 122 kmDetail info | Read user reports | You felt it? - Report it!';storedMarkers.push(['quake-23282307',-31.26000,-68.53000,'16 minutes ago: Mag. 4.1, 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 Albardon, a town with 20,000 inhabitants in Argentina, in 19.7 km (12 mi) distance south of the epicenter. People likely experienced very weak shaking there. In the capital of Chile, Santiago, 315 km (196 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(*)RegionCountry20 km (12 mi)S of epicenterAlbardon(pop: 20,400)II: Very weakDepartamento de Albardon, San Juan ProvinceArgentina20 km (12 mi)S of epicenterVilla General San Martin(pop: 10,100)II: Very weakDepartamento de San Martin, San Juan ProvinceArgentina26 km (16 mi)S of epicenterChimbas(pop: 73,800)II: Very weakSan Juan ProvinceArgentina26 km (16 mi)S of epicenterVilla Paula de Sarmiento(pop: 19,100)II: Very weakDepartamento de Chimbas, San Juan ProvinceArgentina31 km (19 mi)S of epicenterSan Juan(pop: 109,100)II: Very weakDepartamento de Capital, San Juan ProvinceArgentina31 km (20 mi)S of epicenterSanta Lucia(pop: 43,600)II: Very weakDepartamento de Santa Lucia, San Juan ProvinceArgentina38 km (23 mi)SW of epicenterVilla Basilio Nievas(pop: 4,040)II: Very weakDepartamento de Zonda, San Juan ProvinceArgentina47 km (29 mi)S of epicenterPocito(pop: 41,000)II: Very weakSan Juan ProvinceArgentina47 km (29 mi)S of epicenterNueve de Julio(pop: 7,650)II: Very weakSan Juan ProvinceArgentina50 km (31 mi)SE of epicenterCaucete(pop: 33,600)II: Very weakSan Juan ProvinceArgentina85 km (53 mi)W of epicenterCalingasta(pop: 8,180)II: Very weakSan Juan ProvinceArgentina115 km (72 mi)N of epicenterSan Jose de Jachal(pop: 21,000)II: Very weakDepartamento de Jachal, San Juan ProvinceArgentina123 km (76 mi)NE of epicenterVilla San Agustin(pop: 6,860)II: Very weakValle Fertil, San Juan ProvinceArgentina184 km (114 mi)S of epicenterMendoza(pop: 114,900)I: Not feltDepartamento de Guaymallen, Mendoza ProvinceArgentina203 km (126 mi)S of epicenterSan Martin(pop: 82,500)I: Not feltDepartamento de San Martin, Mendoza ProvinceArgentina249 km (155 mi)NW of epicenterVicuna(pop: 27,800)I: Not feltProvincia de Elqui, Region de CoquimboChile254 km (158 mi)NE of epicenterChilecito(pop: 42,200)I: Not feltLa Rioja ProvinceArgentina254 km (158 mi)W of epicenterIllapel(pop: 22,800)I: Not feltProvincia de Choapa, Region de CoquimboChile261 km (162 mi)NE of epicenterLa Rioja(pop: 178,900)I: Not feltDepartamento de Capital, La Rioja ProvinceArgentina262 km (163 mi)SW of epicenterLos Andes(pop: 63,000)I: Not feltRegion de ValparaisoChile265 km (165 mi)W of epicenterOvalle(pop: 77,100)I: Not feltProvincia de Limari, Region de CoquimboChile265 km (165 mi)SW of epicenterSan Felipe(pop: 59,300)I: Not feltRegion de ValparaisoChile288 km (179 mi)SW of epicenterLa Ligua(pop: 32,100)I: Not feltPetorca, Region de ValparaisoChile296 km (184 mi)SW of epicenterColina(pop: 146,200)I: Not feltChacabuco, Santiago MetropolitanChile299 km (186 mi)SE of epicenterLa Punta(pop: 15,000)I: Not feltJuan Martin de Pueyrredon, San Luis ProvinceArgentina301 km (187 mi)NW of epicenterLa Serena(pop: 154,500)I: Not feltProvincia de Elqui, Region de CoquimboChile306 km (190 mi)NW of epicenterCoquimbo(pop: 161,300)I: Not feltProvincia de Elqui, Region de CoquimboChile307 km (191 mi)SE of epicenterSan Luis(pop: 169,900)I: Not feltJuan Martin de Pueyrredon, San Luis ProvinceArgentina309 km (192 mi)SW of epicenterPenalolen(pop: 241,600)I: Not feltSantiago, Santiago MetropolitanChile312 km (194 mi)SW of epicenterQuilicura(pop: 210,400)I: Not feltSantiago, Santiago MetropolitanChile314 km (195 mi)SW of epicenterRenca(pop: 147,200)I: Not feltSantiago, Santiago MetropolitanChile315 km (196 mi)SW of epicenterSantiago(pop: 4,837,300)I: Not feltSantiago MetropolitanChile315 km (196 mi)SW of epicenterLampa(pop: 102,200)I: Not feltChacabuco, Santiago MetropolitanChile319 km (198 mi)SW of epicenterLo Prado(pop: 104,300)I: Not feltSantiago, Santiago MetropolitanChile325 km (202 mi)SW of epicenterPuente Alto(pop: 568,100)I: Not feltCordillera, Santiago MetropolitanChile325 km (202 mi)SW of epicenterLa Pintana(pop: 201,200)I: Not feltSantiago, Santiago MetropolitanChile325 km (202 mi)E of epicenterVilla Dolores(pop: 28,000)I: Not feltDepartamento de San Javier, Cordoba ProvinceArgentina327 km (203 mi)SW of epicenterMaipu(pop: 503,600)I: Not feltSantiago, Santiago MetropolitanChile394 km (245 mi)SE of epicenterVilla Mercedes(pop: 96,800)I: Not feltGeneral Pedernera, San Luis ProvinceArgentina408 km (253 mi)NE of epicenterCatamarca(pop: 159,100)I: Not feltDepartamento de Capital, Catamarca ProvinceArgentinaNotes:(*) Shaking intensity according to the Modified Mercalli Intensity Scale (MMI) and estimated using seismic models.User-reports for this quake (1)So far, we have received 1 report for this quake. This section is being updated as new data comes in.User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.Translate184.7 km S of epicenter [Map] / not felt (reported through our app)What is Intensity and the Mercalli Intensity Scale?The amount of shaking that occurs on the surface due to an earthquake is called the intensity. It is commonly measured on the so-called Modified Mercalli Intensity Scale (MMI) ranging from 1 (not felt) to 10 (extreme shaking), and given in Roman numerals as I,II,...IX, X, and often displayed with color codes ranging from light blue to dark red.Earthquake intensity depends mainly on the magnitude and depth of the quake as well as the distance from the epicenter: The further away, the less shaking intensity occurs.Read more about the MMI scale!Number of reports by intensityShaking intensityNumber of reportsMin-Max distance from epicenter (*)Average distance (*)I: Not felt1184–184 km (115–115 mi)184 km (115 mi)Notes(*) Reports are filtered to exclude those that are likely highly inaccurate or esaggerated.Only reports with latitude/longitude coordinate positions given (1 in total) could be used for geographic statistics.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 GMT2026-08-17EpicenterAgency4.09122 km76 mi02:21:24SAN JUAN, ARGENTINAEMSC (European-Mediterranean Seismological Centre)4.1122 km76 mi02:21:24SAN 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 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)Aug 16, 2026 11:21 pm (San Juan)16 minutes ago4.1122 km0 km - This quakeSan Juan, 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 1,200 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 6 or higher: 0.1 quakes per year (or 1 quake every 9.7 years)Mag. 5 or higher: 1.23 quakes per yearMag. 4 or higher: 30 quakes per year (or 2.5 quakes per month)Mag. 3 or higher: 355 quakes per year (or 29.6 quakes per month)Mag. 2 or higher: 1,200 quakes per year (or 3.3 quakes per day)Mag. 1 or higher: 1,200 quakes per year (or 3.3 quakes per day)The area where this quake occurred has a very high level of seismic activity. It has had at least 13 quakes above magnitude 6 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 5 to 10 years.Number of quakes per yearPrevious quakes in the same area of this earthquake