Moderate magnitude 4.0 earthquake at 17 km depth20 Aug 03:22 UTC: First to report: EMSC after 26 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeAug 20, 2026 02:56:16 UTC - Local time at epicenterThursday, Aug 20, 2026, at 02:56 am (Universal Time GMT +0)Statuspreliminary (automatic detection)Magnitude4.00Depth17.2 kmEpicenter latitude / longitude16.075°N / 97.61°WVilla de Tututepec de Melchor Ocampo, Estado de Oaxaca, MexicoSeismic antipode16.075°S / 82.39°EShaking intensityIV Light shaking near epicenterFelt0 reportsPrimary data sourceEMSC (European-Mediterranean Seismological Centre)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 energy27 minutes agoAug 20, 2026 02:56 GMT / Aug 20, 2026 02:56 am (Universal Time)Lat / Lng: 16.075 / -97.61: Oaxaca, MexicoSource: EMSCDetail info | You felt it? - Report it!';storedMarkers.push(['quake-23296026',16.07500,-97.61000,'27 minutes ago: Mag. 4.0, Oaxaca, Mexico',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 MexicoNearby placesThe closest larger town where the quake might have been felt is Puerto Escondido, a town with 30,000 inhabitants in Mexico, in 63 km (39 mi) distance east of the epicenter. People likely experienced very weak shaking there. Many smaller towns and villages are located closer to the epicenter and might have experienced stronger shaking. In the capital of Mexico, Mexico City, 406 km (252 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(*)RegionCountry1 km (1 mi)S of epicenterSan Miguel(pop: 533)IV: LightVilla de Tututepec de Melchor Ocampo, Estado de OaxacaMexico10 km (6 mi)W of epicenterSan Jose del Progreso(pop: 4,110)III: WeakVilla de Tututepec de Melchor Ocampo, Estado de OaxacaMexico12 km (7 mi)SE of epicenterEl Zapotalito(pop: 980)III: WeakVilla de Tututepec de Melchor Ocampo, Estado de OaxacaMexico13 km (8 mi)NE of epicenterSanta Maria Acatepec(pop: 1,170)III: WeakVilla de Tututepec de Melchor Ocampo, Estado de OaxacaMexico19 km (12 mi)NW of epicenterCharco Nduayoo(pop: 746)III: WeakSantiago Jamiltepec, Estado de OaxacaMexico20 km (12 mi)N of epicenterPaso de la Reina(pop: 542)III: WeakSantiago Jamiltepec, Estado de OaxacaMexico20 km (12 mi)E of epicenterRio Grande(pop: 12,900)III: WeakVilla de Tututepec de Melchor Ocampo, Estado de OaxacaMexico27 km (17 mi)NE of epicenterTepenixtlahuaca(pop: 2,550)III: WeakTataltepec de Valdes, Estado de OaxacaMexico28 km (17 mi)E of epicenterSan Marcos Zacatepec(pop: 1,030)III: WeakSanta Catarina Juquila, Estado de OaxacaMexico32 km (20 mi)NW of epicenterSantiago Jamiltepec(pop: 10,100)III: WeakEstado de OaxacaMexico32 km (20 mi)NE of epicenterSan Miguel Panixtlahuaca(pop: 5,680)III: WeakEstado de OaxacaMexico37 km (23 mi)NW of epicenterJose Maria Morelos(pop: 2,330)III: WeakSanta Maria Huazolotitlan, Estado de OaxacaMexico40 km (25 mi)NE of epicenterSantiago Yaitepec(pop: 4,120)III: WeakEstado de OaxacaMexico42 km (26 mi)NW of epicenterSan Agustin Chayuco(pop: 2,000)III: WeakSan Agustin Chayuco, Estado de OaxacaMexico43 km (27 mi)NW of epicenterSan Andres Huaxpaltepec(pop: 4,150)III: WeakSan Andres Huaxpaltepec, Estado de OaxacaMexico50 km (31 mi)E of epicenterSantos Reyes Nopala(pop: 5,200)III: WeakEstado de OaxacaMexico52 km (32 mi)N of epicenterQuinicuena(pop: 1,050)III: WeakSanta Cruz Zenzontepec, Estado de OaxacaMexico55 km (34 mi)N of epicenterSantiago Ixtayutla(pop: 1,900)III: WeakEstado de OaxacaMexico55 km (34 mi)NW of epicenterPinotepa de Don Luis(pop: 5,690)III: WeakEstado de OaxacaMexico56 km (35 mi)NW of epicenterPinotepa Nacional(pop: 29,600)III: WeakEstado de OaxacaMexico63 km (39 mi)E of epicenterPuerto Escondido(pop: 29,900)II: Very weakSan Pedro Mixtepec -Dto. 22 -, Estado de OaxacaMexico63 km (39 mi)NE of epicenterSan Pedro Juchaltengo(pop: 1,400)II: Very weakSan Pedro Juchatengo, Estado de OaxacaMexico64 km (40 mi)N of epicenterSantiago Amoltepec(pop: 1,260)II: Very weakEstado de OaxacaMexico64 km (40 mi)W of epicenterCorralero(pop: 1,740)II: Very weakSantiago Pinotepa Nacional, Estado de OaxacaMexico66 km (41 mi)N of epicenterLa Reforma(pop: 1,360)II: Very weakEstado de OaxacaMexico70 km (44 mi)NE of epicenterSanto Domingo Teojomulco(pop: 2,090)II: Very weakEstado de OaxacaMexico71 km (44 mi)NE of epicenterZaniza(pop: 1,340)II: Very weakEstado de OaxacaMexico71 km (44 mi)NW of epicenterSan Antonio Tepetlapa(pop: 2,620)II: Very weakEstado de OaxacaMexico74 km (46 mi)W of epicenterEl Ciruelo(pop: 2,220)II: Very weakSantiago Pinotepa Nacional, Estado de OaxacaMexico75 km (46 mi)E of epicenterSanta Maria Colotepec(pop: 1,370)II: Very weakSanta Maria Colotepec, Estado de OaxacaMexico77 km (48 mi)NW of epicenterIpalapa(pop: 1,910)II: Very weakEstado de OaxacaMexico81 km (50 mi)N of epicenterSan Juan Cabeza del Rio(pop: 1,590)II: Very weakSanta Maria Zacatepec, Estado de OaxacaMexico84 km (52 mi)NE of epicenterVilla Sola de Vega(pop: 1,850)II: Very weakEstado de OaxacaMexico84 km (52 mi)NW of epicenterSan Juan Cacahuatepec(pop: 4,240)II: Very weakEstado de OaxacaMexico86 km (53 mi)NW of epicenterSantiago Llano Grande(pop: 1,880)II: Very weakEstado de OaxacaMexico87 km (54 mi)NW of epicenterZacatepec(pop: 4,850)II: Very weakEstado de OaxacaMexico94 km (59 mi)NE of epicenterSan Vicente Lachixio(pop: 1,300)II: Very weakSan Vicente Lachixio, Estado de OaxacaMexico98 km (61 mi)NW of epicenterHuixtepec(pop: 3,370)II: Very weakOmetepec, Estado de GuerreroMexico145 km (90 mi)NE of epicenterOaxaca(pop: 255,000)II: Very weakEstado de OaxacaMexico406 km (252 mi)NW of epicenterMexico City(pop: 12,294,200)I: Not feltCiudad de MexicoMexicoNotes:(*) 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 GMT2026-08-20EpicenterAgency4.017 km10.7 mi02:56:16OAXACA, MEXICOEMSC (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)Aug 20, 2026 02:56 am (Universal Time)27 minutes ago4.017 km0 km - This quakeEstado de Oaxaca, MexicoMain 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 2,100 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 7 or higher: 0.09 quakes per year (or 1 quake every 11.5 years)Mag. 6 or higher: 0.19 quakes per year (or 1 quake every 5.3 years)Mag. 5 or higher: 2.2 quakes per yearMag. 4 or higher: 142 quakes per year (or 11.8 quakes per month)Mag. 3 or higher: 2,000 quakes per year (or 5.5 quakes per day)Mag. 2 or higher: 2,100 quakes per year (or 5.6 quakes per day)Mag. 1 or higher: 2,100 quakes per year (or 5.6 quakes per day)The area where this quake occurred has a very high level of seismic activity. It has had at least 11 quakes above magnitude 7 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 10 to 15 years.Number of quakes per yearPrevious quakes in the same area of this earthquake