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The quake had a moderate depth of 87 km (54 mi) and was not felt (or at least not reported so).Quake Data | Interactive map | User reports | Earlier quakes here | Quakes in Mexico | Estado de Chiapas | Ciudad de MexicoHint: Click on the image to see different maps of this quake!Light magnitude 3.9 earthquake at 87 km depth18 Oct 13:35 UTC: First to report: INETER after 7 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeOct 18, 2026 13:28:05 UTC - Local time at epicenterSunday, Oct 18, 2026, at 07:28 am (GMT -6)Statuspreliminary (automatic detection)Magnitude3.9Depth87 kmEpicenter latitude / longitude15.668°N / 93.387°WPijijiapan, Estado de Chiapas, MexicoSeismic antipode15.668°S / 86.613°EShaking intensityII Very weak shakingFelt0 reportsPrimary data sourceINETERNearest volcanoMispia (125 km / 78 mi)Weather at epicenter at time of quakeOvercast Clouds 27.9°C (82 F), humidity: 60%, wind: 0 m/s (1 kts) from ENEEstimated seismic energy released4.5 x 1010 joules (12.4 megawatt hours, equivalent to 10.7 tons of TNT) | equivalent to ONE quake of magnitude 3.9 | about seismic energy9 minutes agoOct 18, 2026 13:28 GMT / Oct 18, 2026 07:28 am (GMT -6)Lat / Lng: 15.668 / -93.387: Mexico: 9 km Al Suroeste De San Isidro, MéxicoSource: INETERDetail info | You felt it? - Report it!';storedMarkers.push(['quake-23446402',15.66800,-93.38700,'9 minutes ago: Mag. 3.9, Mexico: 9 km Al Suroeste De San Isidro, México',html,'quakes-5-24.png',18,18,9,9,124]); 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 Pijijiapan, a town with 50,000 inhabitants in Mexico, in 19.2 km (12 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 Mexico, Mexico City, 738 km (459 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(*)RegionCountry2 km (1 mi)NE of epicenterLazaro Cardenas del Rio (Cuatro Vientos)(pop: 315)II: Very weakPijijiapan, Estado de ChiapasMexico12 km (7 mi)N of epicenterTamaulipas(pop: 1,570)II: Very weakPijijiapan, Estado de ChiapasMexico14 km (9 mi)NE of epicenterCoapa(pop: 110)II: Very weakPijijiapan, Estado de ChiapasMexico16 km (10 mi)SE of epicenterTopon(pop: 407)II: Very weakPijijiapan, Estado de ChiapasMexico19 km (12 mi)E of epicenterPijijiapan(pop: 50,100)II: Very weakEstado de ChiapasMexico27 km (17 mi)SE of epicenterEl Palmarcito(pop: 1,140)II: Very weakPijijiapan, Estado de ChiapasMexico27 km (17 mi)NW of epicenterManuel Avila Camacho (Ponte Duro)(pop: 1,780)II: Very weakTonala, Estado de ChiapasMexico28 km (18 mi)NW of epicenterTres Picos(pop: 4,400)II: Very weakTonala, Estado de ChiapasMexico33 km (21 mi)SE of epicenterLas Brisas(pop: 1,720)II: Very weakPijijiapan, Estado de ChiapasMexico36 km (23 mi)NE of epicenterIgnacio Zaragoza(pop: 371)II: Very weakVilla Corzo, Estado de ChiapasMexico36 km (23 mi)N of epicenterLa Libertad(pop: 362)II: Very weakVilla Corzo, Estado de ChiapasMexico37 km (23 mi)E of epicenterPlan de Ayala(pop: 662)II: Very weakPijijiapan, Estado de ChiapasMexico38 km (23 mi)N of epicenterTierra Santa(pop: 342)II: Very weakVilla Corzo, Estado de ChiapasMexico43 km (26 mi)E of epicenterHermenegildo Galeana(pop: 1,160)II: Very weakPijijiapan, Estado de ChiapasMexico43 km (27 mi)SE of epicenterBarrita de Pajon(pop: 375)II: Very weakMapastepec, Estado de ChiapasMexico44 km (27 mi)NW of epicenterLa Polka(pop: 965)II: Very weakTonala, Estado de ChiapasMexico44 km (27 mi)N of epicenterMonterrey(pop: 1,090)II: Very weakVilla Corzo, Estado de ChiapasMexico52 km (32 mi)NW of epicenterCabeza de Toro(pop: 3,410)II: Very weakTonala, Estado de ChiapasMexico52 km (32 mi)NE of epicenterEl Ramal (Porvenir)(pop: 1,050)II: Very weakLa Concordia, Estado de ChiapasMexico54 km (34 mi)NE of epicenterSan Pedro Buenavista(pop: 8,390)II: Very weakVilla Corzo, Estado de ChiapasMexico58 km (36 mi)SE of epicenterMapastepec(pop: 17,900)II: Very weakEstado de ChiapasMexico59 km (37 mi)N of epicenterVilla Corzo(pop: 10,800)II: Very weakEstado de ChiapasMexico60 km (38 mi)NE of epicenterNuevo Vicente Guerrero(pop: 2,910)II: Very weakVilla Corzo, Estado de ChiapasMexico61 km (38 mi)NW of epicenterTonala(pop: 35,300)II: Very weakTonala, Estado de ChiapasMexico64 km (40 mi)N of epicenterVillaflores(pop: 37,200)II: Very weakEstado de ChiapasMexico65 km (40 mi)NE of epicenterRevolucion Mexicana(pop: 7,990)II: Very weakVilla Corzo, Estado de ChiapasMexico67 km (41 mi)NW of epicenterParedon(pop: 6,130)II: Very weakTonala, Estado de ChiapasMexico67 km (42 mi)NE of epicenterLa Tigrilla(pop: 2,350)II: Very weakLa Concordia, Estado de ChiapasMexico70 km (43 mi)E of epicenterNueva Palestina(pop: 3,480)II: Very weakAngel Albino Corzo, Estado de ChiapasMexico70 km (43 mi)E of epicenterDolores Jaltenango(pop: 2,090)II: Very weakLa Concordia, Estado de ChiapasMexico71 km (44 mi)SE of epicenterEl Consuelo Ulapa(pop: 1,940)II: Very weakAcapetahua, Estado de ChiapasMexico74 km (46 mi)N of epicenterDieciseis de Septiembre(pop: 1,180)II: Very weakVillaflores, Estado de ChiapasMexico76 km (47 mi)NE of epicenterEl Ambar (El Ambar de Echeverria)(pop: 2,590)II: Very weakLa Concordia, Estado de ChiapasMexico82 km (51 mi)NE of epicenterJerico(pop: 2,470)II: Very weakVilla Corzo, Estado de ChiapasMexico84 km (52 mi)NW of epicenterArriaga(pop: 24,400)II: Very weakEstado de ChiapasMexico86 km (54 mi)NW of epicenterLa Linea(pop: 1,450)II: Very weakArriaga, Estado de ChiapasMexico94 km (58 mi)NW of epicenterLazaro Cardenas(pop: 1,170)II: Very weakArriaga, Estado de ChiapasMexico124 km (77 mi)N of epicenterTuxtla(pop: 604,100)II: Very weakEstado de ChiapasMexico738 km (459 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!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 GMT2026-10-18EpicenterAgency3.987 km54 mi13:28:059 Km al suroeste de San Isidro, MéxicoINETEREarthquake statisticsAverage number of earthquakesBased on data from the past 26 years and our earthquake archive back to 1900, there are about 708 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 7 or higher: 0.02 quakes per year (or 1 quake every 62.5 years)Mag. 6 or higher: 0.15 quakes per year (or 1 quake every 6.8 years)Mag. 5 or higher: 2.5 quakes per yearMag. 4 or higher: 134 quakes per year (or 11.1 quakes per month)Mag. 3 or higher: 703 quakes per year (or 59 quakes per month)Mag. 2 or higher: 705 quakes per year (or 59 quakes per month)The area where this quake occurred has a very high level of seismic activity. It has had at least 2 quakes above magnitude 7 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 60 to 65 years.Number of quakes per yearPrevious quakes in the same area of this earthquake9 minutes agoOct 18, 2026 13:28 GMT / Oct 18, 2026 07:28 am (GMT -6)Lat / Lng: 15.668 / -93.387: Mexico: 9 km Al Suroeste De San Isidro, MéxicoSource: INETERDetail info | You felt it? - Report it!',3.9,39, '#bb202a', 0.9,1.5, '#bb202a', 0.27);map2.addToMap('thisQuake',15.668,-93.387,'9 minutes ago: Mag. 3.9, Mexico: 9 km Al Suroeste De San Isidro, México','Earthquake: Mag 3.9 / 87 km (54 mi) depth9 minutes agoOct 18, 2026 13:28 GMT / Oct 18, 2026 07:28 am (GMT -6)Lat / Lng: 15.668 / -93.387: Mexico: 9 km Al Suroeste De San Isidro, MéxicoSource: INETERDetail info | You felt it? - Report it!','default'); function putQuakeOnMap(id,lat,lon,time,title,html,mag,zIndex) { qTableOlder.putQuakeOnMap(id,lat,lon,time,title,html,mag,zIndex); } map2.circleScale=0.5;qTableOlder.usePalette=1;qTableOlder.startVal=qTableOlder.referenceTime-(80*365.25*86400);qTableOlder.endVal=qTableOlder.referenceTime; qTableOlder.assignMap(map2); (async function(){await new Promise(r => setTimeout(r,4000));map2.map.setZoom(7)})(); })(); (function(){let done=false;async function loadPrevious(){if(done)return;done=true;while(typeof mkRequest=="undefined")await new Promise(r=>setTimeout(r,500));mkRequest("https://server3.allquakes.com/api/getPrevious.php?quakeId=23446402","get","",function(httpObj){let r=httpObj.responseText,d=document;if(""!=r&&200==httpObj.status){let o=JSON.parse(r);if(!o){let s=d.getElementById("olderQuakesSection");if(s)s.remove();return};let table=d.getElementById("qTableOlder");if(!table)return;table.innerHTML+=o.tableRows,qTableOlder.alternateBg();let ph=d.getElementById("placeholder_largestQText");if(ph)ph.innerHTML=o.html;let wrap=d.getElementById("sectionPreviousCWrap");if(wrap)wrap.style.display="";eval(o.js)}})}let d=document,target=d.getElementById("olderQuakesSection");if(!target||!("IntersectionObserver" in window)){loadPrevious();return}let obs=new IntersectionObserver(function(entries){if(entries.some(e=>e.isIntersecting)){obs.disconnect();loadPrevious()}},{rootMargin:"300px 0px"});obs.observe(target)})();]]>