Moderate magnitude 4.1 earthquake at 17 km depth1 Aug 01:35 UTC: First to report: SSN after 18 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeAug 1, 2025 01:17:55 UTC - Local time at epicenter2025-07-31 19:17:55 (Hora de México)Statuspreliminary (automatic detection)Magnitude4.1Depth16.8 kmEpicenter latitude / longitude15.665°N / 94.948°WMexicoSeismic antipode15.665°S / 85.052°EShaking intensityIV Light shaking near epicenterFelt0 reportsPrimary data sourceSSN (Servicio Sismológico Nacional)Estimated 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 energy18 minutes agoAug 1, 2025 01:17 GMT / 2025-07-31 19:17:55 (Hora de México)Lat / Lng: 15.665 / -94.948: Mexico: 63 km Al SURESTE De SALINA CRUZ, OAXSource: SSNDetail info | You felt it? - Report it!';storedMarkers.push(['quake-22011882',15.66500,-94.94800,'18 minutes ago: Mag. 4.1, Mexico: 63 km Al SURESTE De SALINA CRUZ, OAX',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 Salina Cruz, a town with 77,000 inhabitants in Mexico, in 63 km (39 mi) distance northwest of the epicenter. People likely experienced weak shaking there. Several smaller towns and villages are located closer to the epicenter and might have experienced stronger shaking. In the capital of Mexico, Mexico City, 610 km (379 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(*)RegionCountry60 km (37 mi)N of epicenterBarrio Nuevo(pop: 33)III: WeakMexico60 km (37 mi)N of epicenterLa Reforma(pop: 210)III: WeakMexico62 km (38 mi)NW of epicenterPlaya Azul(pop: 22)III: WeakSalina Cruz, Estado de OaxacaMexico63 km (39 mi)NW of epicenterSalina Cruz(pop: 76,600)III: WeakEstado de OaxacaMexico63 km (39 mi)N of epicenterSanta Maria del Mar(pop: 771)III: WeakHeroica de Juchitan de Zaragoza, Estado de OaxacaMexico65 km (40 mi)NW of epicenterZanjon y Garrapatero(pop: 279)III: WeakSanto Domingo Tehuantepec, Estado de OaxacaMexico67 km (41 mi)NW of epicenterEl Morro(pop: 2,630)II: Very weakSanto Domingo Tehuantepec, Estado de OaxacaMexico71 km (44 mi)NE of epicenterSan Francisco del Mar Viejo(pop: 4,030)II: Very weakSan Francisco del Mar, Estado de OaxacaMexico72 km (45 mi)NW of epicenterZaachilac(pop: 222)II: Very weakSantiago Astata, Estado de OaxacaMexico72 km (45 mi)N of epicenterAlvaro Obregon(pop: 3,560)II: Very weakHeroica de Juchitan de Zaragoza, Estado de OaxacaMexico74 km (46 mi)NW of epicenterRincon Moreno(pop: 1,020)II: Very weakSanto Domingo Tehuantepec, Estado de OaxacaMexico76 km (47 mi)N of epicenterSan Dionisio del Mar(pop: 3,140)II: Very weakEstado de OaxacaMexico78 km (48 mi)N of epicenterSanta Maria Xadani(pop: 7,610)II: Very weakSanta Maria Xadani, Estado de OaxacaMexico79 km (49 mi)NW of epicenterSanta Clara(pop: 371)II: Very weakSanto Domingo Tehuantepec, Estado de OaxacaMexico80 km (50 mi)NW of epicenterSanto Domingo Tehuantepec(pop: 42,100)II: Very weakEstado de OaxacaMexico80 km (50 mi)N of epicenterSan Blas Atempa(pop: 12,000)II: Very weakEstado de OaxacaMexico81 km (50 mi)NE of epicenterCerro Grande(pop: 548)II: Very weakSan Francisco Ixhuatan, Estado de OaxacaMexico83 km (52 mi)NW of epicenterLas Cruces(pop: 141)II: Very weakSanto Domingo Tehuantepec, Estado de OaxacaMexico86 km (53 mi)NE of epicenterLas Amilpas(pop: 8,800)II: Very weakSan Dionisio del Mar, Estado de OaxacaMexico86 km (53 mi)NW of epicenterSantiago Astata(pop: 2,210)II: Very weakEstado de OaxacaMexico90 km (56 mi)NW of epicenterEl Gavilan(pop: 107)II: Very weakSan Pedro Huamelula, Estado de OaxacaMexico91 km (57 mi)NE of epicenterSan Francisco Ixhuatan(pop: 5,410)II: Very weakSan Francisco Ixhuatan, Estado de OaxacaMexico93 km (58 mi)NE of epicenterRincon de Juarez(pop: 941)II: Very weakSan Pedro Tapanatepec, Estado de OaxacaMexico94 km (58 mi)NW of epicenterBuenos Aires(pop: 271)II: Very weakSanto Domingo Tehuantepec, Estado de OaxacaMexico95 km (59 mi)NE of epicenterPesqueria Rancho Salinas(pop: 593)II: Very weakSan Pedro Tapanatepec, Estado de OaxacaMexico96 km (60 mi)NW of epicenterSan Miguel Tenango(pop: 640)II: Very weakEstado de OaxacaMexico109 km (68 mi)NW of epicenterLa Pajima(pop: 243)II: Very weakMagdalena Tequisistlan, Estado de OaxacaMexico610 km (379 mi)NW of epicenterMexico City(pop: 12,294,200): 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!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 GMT2025-08-1EpicenterAgency4.117 km10.4 mi01:17:5563 km al SURESTE de SALINA CRUZ, OAXSSN (Servicio Sismológico Nacional)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)2025-07-31 19:17:55 (Hora de México)18 minutes ago4.117 km0 km - This quakeMexico: 63 km Al SURESTE De SALINA CRUZ, OAXMain 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. 6 or higher: 0.13 quakes per year (or 1 quake every 7.7 years)Mag. 5 or higher: 2.8 quakes per yearMag. 4 or higher: 362 quakes per year (or 30.2 quakes per month)Mag. 3 or higher: 1,500 quakes per year (or 4.1 quakes per day)Mag. 2 or higher: 1,500 quakes per year (or 4.1 quakes per day)The area where this quake occurred has a very high level of seismic activity. It has had at least 16 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