Moderate magnitude 4.2 earthquake at 133 km depth28 Jul 20:57 UTC: First to report: EMSC after 5 minutes.28 Jul 21:03: Magnitude recalculated from 4.3 to 4.2. Hypocenter depth recalculated from 116.00 to 132.70 km (from 72 to 82 mi). Epicenter location corrected by 31 km (20 mi) towards W.I didn't feel itI felt this quakeEarthquake detailsDate & timeJul 28, 2025 20:51:54 UTC - Local time at epicenterMonday, Jul 28, 2025, at 05:51 pm (GMT -3)StatusconfirmedMagnitude4.2Depth133 kmEpicenter latitude / longitude32.14°S / 70.21°WDepartamento de Calingasta, San Juan Province, ArgentinaAlso near: Chile 11.8 km (7 mi) awaySeismic antipode32.14°N / 109.79°EShaking intensityII Very weak shakingFelt1 reportPrimary data sourceEMSC (European-Mediterranean Seismological Centre)Nearest volcanoTupungato (142 km / 88 mi)Weather at epicenter at time of quakeClear Sky 3.7°C (39 F), humidity: 37%, wind: 5 m/s (10 kts) from WSWEstimated seismic energy released1.3 x 1011 joules (35 megawatt hours, equivalent to 30.1 tons of TNT) | equivalent to ONE quake of magnitude 4.2 | about seismic energy14 minutes ago reported feltJul 28, 2025 20:51 GMT / Jul 28, 2025 05:51 pm (GMT -3)Lat / Lng: -32.14 / -70.21: San Juan, ArgentinaSource: EMSCOther sources: GFZ: 4.3 / 108 kmDetail info | Read user reports | You felt it? - Report it!';storedMarkers.push(['quake-22000587',-32.14000,-70.21000,'14 minutes ago: Mag. 4.2, 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 Salamanca, a town with 13,000 inhabitants in Chile, in 82 km (51 mi) distance northwest of the epicenter. People likely experienced very weak shaking there. In the capital of Chile, Santiago, 152 km (95 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(*)RegionCountry82 km (51 mi)NW of epicenterSalamanca(pop: 13,300)II: Very weakProvincia de Choapa, Region de CoquimboChile83 km (52 mi)SW of epicenterSan Felipe(pop: 59,300)II: Very weakRegion de ValparaisoChile85 km (53 mi)SW of epicenterLos Andes(pop: 56,900)II: Very weakRegion de ValparaisoChile102 km (63 mi)W of epicenterLa Ligua(pop: 24,900)II: Very weakPetorca, Region de ValparaisoChile105 km (65 mi)SW of epicenterLlaillay(pop: 16,600)II: Very weakSan Felipe de Aconcagua, Region de ValparaisoChile107 km (66 mi)NW of epicenterIllapel(pop: 22,800)II: Very weakProvincia de Choapa, Region de CoquimboChile117 km (72 mi)NE of epicenterCalingasta(pop: 8,180)II: Very weakSan Juan ProvinceArgentina119 km (74 mi)SW of epicenterHacienda La Calera(pop: 49,100)II: Very weakQuillota, Region de ValparaisoChile128 km (79 mi)SW of epicenterQuillota(pop: 67,800)II: Very weakRegion de ValparaisoChile138 km (86 mi)SW of epicenterLimache(pop: 35,900)II: Very weakMarga Marga, Region de ValparaisoChile142 km (88 mi)SW of epicenterLampa(pop: 29,300)II: Very weakChacabuco, Santiago MetropolitanChile149 km (92 mi)SW of epicenterVilla Alemana(pop: 97,300)II: Very weakMarga Marga, Region de ValparaisoChile152 km (95 mi)S of epicenterSantiago(pop: 4,837,300)II: Very weakSantiago MetropolitanChile153 km (95 mi)S of epicenterLo Prado(pop: 104,300)II: Very weakSantiago, Santiago MetropolitanChile153 km (95 mi)SW of epicenterQuilpue(pop: 130,300)II: Very weakMarga Marga, Region de ValparaisoChile154 km (96 mi)SE of epicenterMendoza(pop: 114,900)II: Very weakDepartamento de Guaymallen, Mendoza ProvinceArgentina160 km (99 mi)SW of epicenterVina del Mar(pop: 294,600)II: Very weakValparaiso, Region de ValparaisoChile162 km (101 mi)E of epicenterPocito(pop: 41,000)II: Very weakSan Juan ProvinceArgentina165 km (103 mi)S of epicenterLa Pintana(pop: 201,200)II: Very weakSantiago, Santiago MetropolitanChile166 km (103 mi)SW of epicenterValparaiso(pop: 282,400)II: Very weakValparaiso, Region de ValparaisoChile167 km (104 mi)S of epicenterPuente Alto(pop: 568,100)II: Very weakCordillera, Santiago MetropolitanChile168 km (104 mi)S of epicenterSan Bernardo(pop: 249,900)II: Very weakMaipo, Santiago MetropolitanChile172 km (107 mi)NE of epicenterSan Juan(pop: 109,100)II: Very weakDepartamento de Capital, San Juan ProvinceArgentina172 km (107 mi)NE of epicenterSan Juan(pop: 109,100)II: Very weakDepartamento de Capital, San Juan ProvinceArgentina174 km (108 mi)NE of epicenterVilla Paula de Sarmiento(pop: 19,100)II: Very weakDepartamento de Chimbas, San Juan ProvinceArgentina174 km (108 mi)NE of epicenterChimbas(pop: 73,800)II: Very weakSan Juan ProvinceArgentina175 km (108 mi)S of epicenterPenaflor(pop: 65,500)II: Very weakTalagante, Santiago MetropolitanChile175 km (109 mi)E of epicenterSanta Lucia(pop: 43,600)II: Very weakDepartamento de Santa Lucia, San Juan ProvinceArgentina177 km (110 mi)NE of epicenterAlbardon(pop: 20,400)II: Very weakDepartamento de Albardon, San Juan ProvinceArgentina182 km (113 mi)S of epicenterTalagante(pop: 51,800)II: Very weakSantiago MetropolitanChile184 km (114 mi)S of epicenterBuin(pop: 55,400)II: Very weakMaipo, Santiago MetropolitanChile190 km (118 mi)E of epicenterCaucete(pop: 33,600)I: Not feltSan Juan ProvinceArgentina194 km (120 mi)SE of epicenterSan Martin(pop: 82,500)I: Not feltDepartamento de San Martin, Mendoza ProvinceArgentina195 km (121 mi)NW of epicenterOvalle(pop: 77,100)I: Not feltProvincia de Limari, Region de CoquimboChile196 km (122 mi)SW of epicenterMelipilla(pop: 63,100)I: Not feltSantiago MetropolitanChile208 km (129 mi)SW of epicenterSan Antonio(pop: 85,700)I: Not feltRegion de ValparaisoChile231 km (144 mi)S of epicenterRancagua(pop: 212,700)I: Not feltProvincia de Cachapoal, Region del Libertador General Bernardo O'HigginsChile253 km (157 mi)NE of epicenterSan Jose de Jachal(pop: 21,000)I: Not feltDepartamento de Jachal, San Juan ProvinceArgentina326 km (202 mi)SE of epicenterSan Rafael(pop: 118,000)I: Not feltMendoza ProvinceArgentina442 km (274 mi)NE of epicenterLa Rioja(pop: 178,900)I: Not feltCapital, La Rioja 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 from Chile.It came from near Chicureo Abajo, a town with 18,000 inhabitants in Santiago Metropolitan in 134 km (83 mi) distance south of the epicenter, Chile.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.Translate141.3 km SSW of epicenter [Map] / Weak shaking (MMI III) (reported through our app)List of cities/places with most reportsPlaceDistance from epicenterAverage reported Shaking IntensityNr. of reportsChicureo Abajo, Santiago Metropolitan, Chile(Pop.: 18,000)134 km (83 mi)S of epicenterIII: Weak shaking1Note: Only reports with latitude/longitude coordinate positions given (1 in total) could be used for statistics.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!I didn't feel itI felt this quakeIf you were near the epicenter and felt it, please share your experience and submit a short "I felt it" report! Other users would love to hear about it!If you did NOT feel the quake although you were in the area, please report it as well! Your contribution is valuable to earthquake science and seismic hazard analysis.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 GMT2025-07-28EpicenterAgency4.2133 km82 mi20:51:54SAN JUAN, ARGENTINAEMSC (European-Mediterranean Seismological Centre)4.3108 km67 mi20:51:53.96Mendoza Province, Argentina29 km (18 mi) epicenter difference with EMSCGFZ (German Research Centre for Geosciences)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 2 km2 (1 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 28, 2025 05:51 pm (GMT -3)14 minutes ago4.2133 km0 km - This quakeDepartamento de Calingasta, San Juan Province, ArgentinaMain Shock (this quake)MoreMap of aftershocksEarthquake statisticsAverage number of earthquakesBased on data from the past 55 years and our earthquake archive back to 1900, there are about 547 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 6 or higher: 0.02 quakes per year (or 1 quake every 41.7 years)Mag. 5 or higher: 0.96 quakes per year (or 1 quake every 1 years)Mag. 4 or higher: 16.7 quakes per yearMag. 3 or higher: 191 quakes per year (or 15.9 quakes per month)Mag. 2 or higher: 547 quakes per year (or 46 quakes per month)Mag. 1 or higher: 550 quakes per year (or 46 quakes per month)The area where this quake occurred has a high level of seismic activity. It has had at least 3 quakes above magnitude 6 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 40 to 45 years.Number of quakes per yearPrevious quakes in the same area of this earthquakeThe earthquake occurred 5 weeks after a magnitude 4.7 earthquake had hit on Sunday, Jun 22, 2025, at 11:46 am local time (America/Argentina/San Juan GMT -3) in 94 km (58 mi) distance to the northeast:Mag. 4.7 earthquake Departamento de Calingasta - San Juan Province, Argentina - Jun 22, 2025 - The strongest-ever (since 1900) recorded quake in this area measured magnitude 8.2. It had occurred 10 years ago earlier, on Wednesday, Sep 16, 2015, at 06:54 pm local time (America/Santiago GMT -4) in Region de Coquimbo, Chile:Mag. 8.2 earthquake 40 km west of Illapel - Region de Coquimbo, Chile - Sep 16, 2015 - Below is a list and map of larger or recent quakes that had occurred near the epicenter before this earthquake (within up to 100 km/61 mi distance, up to 300 km/183 mi for very large quakes above mag. 7). Filter and sort the list by magnitude or time.Max results102050100AllMagnitudeAll2+3+4+5+6+7+8+Time before48 hours1 week30 days1 year5 years30 yearsAny ageDate and TimeMagDepthDistanceLocationDetailsMapJun 22, 11:46 am (San Juan)4.7118 km94 km (58 mi) to the NEDepartamento de Calingasta, 80 km west of San Juan, Departamento de Capital, San Juan Province, Argentina 1 reportInfoJun 13, 01:55 am (Santiago)4.2118 km19 km (12 mi) to the NProvincia de Choapa, Region de Coquimbo, 97 km northeast of San Felipe, San Felipe de Aconcagua, Region de Valparaiso, ChileInfoJun 10, 07:17 am (San Juan)4.5110 km91 km (56 mi) to the NEDepartamento de Calingasta, 73 km west of Pocito, Pocito, San Juan Province, Argentina 1 reportInfoJun 1, 04:33 am (San Juan)4.5117 km87 km (54 mi) to the EDepartamento de Calingasta, 76 km southwest of Pocito, Pocito, San Juan Province, Argentina 1 reportInfoMay 4, 11:17 pm (Santiago)4.988 km69 km (43 mi) to the NW 39 km southeast of Illapel, Provincia de Choapa, Region de Coquimbo, Chile 98 reportsInfoJan 28, 01:51 pm (San Juan)4.8108 km120 km (74 mi) to the NEDepartamento de Zonda, 53 km west of San Juan, Departamento de Capital, San Juan Province, Argentina 6 reportsInfoNov 3, 2021 12:17 am (Mendoza)5.6106 km59 km (37 mi) to the SE Mendoza Province, Argentina 747 reportsInfoMay 20, 2019 08:18 am (San Juan)5.4106 km77 km (48 mi) to the N San Juan Province, Argentina 71 reportsInfoDec 31, 2018 07:49 am (San Juan)5.292 km100 km (62 mi) to the EDepartamento de Calingasta, 72 km southwest of San Juan, Departamento de Capital, San Juan Province, Argentina 93 reportsInfoFeb 1, 2018 08:13 pm (San Juan)5.2101 km66 km (41 mi) to the NDepartamento de Calingasta, 143 km west of San Juan, Departamento de Capital, San Juan Province, Argentina 5 reportsInfoSep 16, 2015 06:54 pm (Santiago)8.223 km146 km (91 mi) to the NW Near Coast of Central Chile 103 reportsInfoApr 4, 2014 06:52 am (San Juan)5.496 km72 km (44 mi) to the NDepartamento de Calingasta, 169 km west of San Juan, Departamento de Capital, San Juan Province, ArgentinaInfoDec 9, 2013 09:51 pm (San Juan)5.3113 km120 km (74 mi) to the NE 13 km ESE of Calingasta, ArgentinaInfoJun 19, 2013 06:29 pm (Mendoza)5.3104 km60 km (37 mi) to the SDepartamento de Las Heras, 116 km west of Mendoza, Departamento de Guaymallen, Mendoza Province, Argentina 3 reportsInfoOct 11, 2012 01:22 pm (Santiago)5.582 km81 km (50 mi) to the S 27 km east of Los Andes, Los Andes, Region de Valparaiso, Chile 4 reportsInfoOct 17, 2010 11:40 am (San Juan)5.4111 km68 km (42 mi) to the EDepartamento de Calingasta, 97 km southwest of Pocito, Pocito, San Juan Province, ArgentinaInfoMar 11, 2010 10:55 am (Santiago)7.018 km285 km (177 mi) to the SW 52 km NW of Santa Cruz, ChileInfoFeb 27, 2010 03:51 am (San Juan)6.040 km114 km (71 mi) to the NEDepartamento de Zonda, 59 km west of San Juan, Departamento de Capital, San Juan Province, ArgentinaInfoMay 8, 2009 10:44 am (San Juan)5.4112 km51 km (32 mi) to the EDepartamento de Calingasta, 122 km southwest of San Juan, Departamento de Capital, San Juan Province, ArgentinaInfoApr 26, 2009 05:03 am (Mendoza)5.3115 km113 km (70 mi) to the SEDepartamento de Lujan, 49 km west of Mendoza, Departamento de Guaymallen, Mendoza Province, ArgentinaInfoMar 11, 2009 10:06 am (San Juan)5.328 km100 km (62 mi) to the EDepartamento de Calingasta, 73 km southwest of San Juan, Departamento de Capital, San Juan Province, ArgentinaInfoSep 9, 2005 08:26 am (San Juan)5.8113 km114 km (71 mi) to the NEDepartamento de Zonda, 59 km west of San Juan, Departamento de Capital, San Juan Province, ArgentinaInfoDec 21, 2003 10:54 pm (San Juan)5.175 km82 km (51 mi) to the NE 54 km S of Calingasta, ArgentinaInfoSep 24, 2002 12:57 am (San Juan)6.3120 km118 km (73 mi) to the NE 29 km SE of Calingasta, ArgentinaInfoMay 23, 2002 08:23 pm (Santiago)5.760 km72 km (45 mi) to the W 43 km southeast of Illapel, Provincia de Choapa, Region de Coquimbo, ChileInfoNov 27, 1998 07:27 am (Mendoza)5.5127 km83 km (52 mi) to the EDepartamento de Las Heras, 96 km northwest of Mendoza, Departamento de Guaymallen, Mendoza Province, ArgentinaInfoOct 14, 1997 09:03 pm (Santiago)7.158 km165 km (102 mi) to the NW 37 km south of Ovalle, Provincia de Limari, Region de Coquimbo, ChileInfoJun 8, 1993 08:17 pm (San Juan)6.3113 km113 km (70 mi) to the NEDepartamento de Calingasta, 67 km west of Chimbas, Departamento de Chimbas, San Juan Province, ArgentinaInfoSep 15, 1991 07:56 pm (San Juan)5.9110 km74 km (46 mi) to the NDepartamento de Calingasta, 133 km west of Chimbas, Departamento de Chimbas, San Juan Province, ArgentinaInfoDec 21, 1990 03:31 pm (Mendoza)5.5116 km81 km (51 mi) to the SEDepartamento de Las Heras, 80 km west of Mendoza, Departamento de Guaymallen, Mendoza Province, ArgentinaInfoJul 16, 1990 11:51 am (San Juan)5.7102 km43 km (27 mi) to the SEDepartamento de Calingasta, San Juan Province, 116 km northwest of Mendoza, Departamento de Guaymallen, Mendoza Province, ArgentinaInfoApr 8, 1985 09:56 pm (Santiago)7.238 km257 km (160 mi) to the SWProvincia de Cardenal Caro, Region del Libertador General Bernardo O'Higgins, 60 km south of San Antonio, San Antonio, Region de Valparaiso, ChileInfoMar 3, 1985 08:32 pm (Santiago)7.433 km181 km (112 mi) to the SWValparaiso, 27 km southwest of Quilpue, Marga Marga, Region de Valparaiso, ChileInfoMar 3, 1985 06:47 pm (Santiago)8.033 km191 km (119 mi) to the SW 25 km WSW of Valparaíso, ChileInfoNov 28, 1977 03:40 pm (San Juan)5.586 km107 km (66 mi) to the EDepartamento de Sarmiento, 76 km southwest of San Juan, Departamento de Capital, San Juan Province, ArgentinaInfoNov 23, 1977 06:26 am (San Juan)7.413 km262 km (163 mi) to the NE San Juan, ArgentinaInfoJun 14, 1975 06:40 am (Santiago)5.794 km59 km (37 mi) to the SW 29 km north of San Felipe, San Felipe de Aconcagua, Region de Valparaiso, ChileInfoDec 29, 1974 02:20 pm (Mendoza)5.599 km97 km (60 mi) to the S 59 km ESE of Los Andes, ChileInfoSep 28, 1971 08:16 pm (San Juan)5.7106 km22 km (14 mi) to the NEDepartamento de Calingasta, San Juan Province, 145 km northwest of Mendoza, Departamento de Guaymallen, Mendoza Province, ArgentinaInfoJul 8, 1971 11:03 pm (Santiago)7.860 km96 km (60 mi) to the SW 24 km northeast of Hacienda La Calera, Quillota, Region de Valparaiso, ChileInfoApr 7, 1971 12:10 pm (Mendoza)5.6117 km117 km (73 mi) to the E Mendoza, ArgentinaInfoDec 13, 1969 05:33 pm (Santiago)5.5103 km79 km (49 mi) to the SLos Andes, Region de Valparaiso, 78 km northeast of Santiago, Santiago, Santiago Metropolitan, ChileInfoOct 26, 1967 09:34 pm (Mendoza)5.220 km73 km (46 mi) to the EDepartamento de Las Heras, 91 km northwest of Mendoza, Departamento de Guaymallen, Mendoza Province, ArgentinaInfoMay 2, 1965 09:09 pm (Santiago)5.790 km56 km (35 mi) to the SW 28 km northeast of San Felipe, San Felipe de Aconcagua, Region de Valparaiso, ChileInfoMar 28, 1965 12:33 pm (Santiago)7.470 km105 km (65 mi) to the SW 7.8 km south of La Ligua, Petorca, Region de Valparaiso, ChileInfoApr 6, 1943 04:07 pm (Universal Time)8.135 km147 km (91 mi) to the NW 45 km northwest of Illapel, Provincia de Choapa, Region de Coquimbo, ChileInfoMar 18, 1931 08:02 am (Universal Time)7.235 km235 km (146 mi) to the SW 37 km south of San Antonio, San Antonio, Region de Valparaiso, ChileInfoAug 17, 1906 12:40 am (Universal Time)8.235 km116 km (72 mi) to the W Valparaiso, ChileInfoMap of earlier quakes in the area of this quakeMax results102050100AllMagnitudeAll2+3+4+5+6+7+8+Time before48 hours1 week30 days1 year5 years30 yearsAny ageOldest quakes are shown in yellow, most recent in red.[quakes -][quakes +][smaller][bigger]