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The depth of the quake could not be determined, but is assumed to be shallow.The quake was not felt (or at least not reported so).Quake Data | Interactive map | User reports | Aftershocks | Earlier quakes here | Quakes in the Philippines | Cagayan Valley | Cordillera Administrative Region | National Capital RegionHint: Click on the image to see different maps of this quake!Moderate magnitude 4.0 earthquake at unknown depth20 Aug 13:05 UTC: First to report: PHIVOLCS after 8 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeAug 20, 2026 12:57:00 UTC - Local time at epicenterThursday, Aug 20, 2026, at 08:57 pm (GMT +8)StatusconfirmedMagnitude4.0Depth10 kmEpicenter latitude / longitude17.38°N / 122.71°ECagayan Valley, PhilippinesSeismic antipode17.38°S / 57.29°WBrazilShaking intensityIV Light shaking near epicenterFelt0 reportsPrimary data sourcePHIVOLCS (Philippine Institute of Volcanology and Seismology)Nearest volcanoCagua (112 km / 70 mi)Weather at epicenter at time of quakeOvercast Clouds 29.4°C (85 F), humidity: 80%, wind: 3 m/s (6 kts) from NNWEstimated 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 energy9 minutes agoAug 20, 2026 12:57 GMT / Aug 20, 2026 08:57 pm (GMT +8)Lat / Lng: 17.38 / 122.71: Philippines: 044 km N 82° E of Divilacan (Isabela)Source: PHIVOLCSOther sources: RaspberryShake: 4.0 / 10 kmDetail info | You felt it? - Report it!';storedMarkers.push(['quake-23297800',17.38000,122.71000,'9 minutes ago: Mag. 4.0, Philippines: 044 km N 82° E of Divilacan (Isabela)',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 PhilippinesNearby placesThe closest larger town where the quake might have been felt is Ilagan, a city with more than 160,000 inhabitants in the Philippines, in 91 km (56 mi) distance west 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 the Philippines, Manila, 360 km (224 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(*)RegionCountry46 km (28 mi)SW of epicenterDicabisagan(pop: 3,500)III: WeakProvince of Isabela, Cagayan ValleyPhilippines86 km (54 mi)SW of epicenterSan Mariano(pop: 12,400)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines90 km (56 mi)W of epicenterAntagan Segunda(pop: 4,070)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines91 km (56 mi)W of epicenterIlagan(pop: 164,000)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines94 km (58 mi)NW of epicenterLapi(pop: 2,850)II: Very weakProvince of Cagayan, Cagayan ValleyPhilippines100 km (62 mi)W of epicenterRagan Norte(pop: 4,220)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines100 km (62 mi)W of epicenterGamu(pop: 5,550)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines100 km (62 mi)W of epicenterCabagan(pop: 25,300)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines102 km (64 mi)SW of epicenterDicamay(pop: 2,370)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines103 km (64 mi)W of epicenterAggugaddah(pop: 2,360)II: Very weakProvince of Cagayan, Cagayan ValleyPhilippines106 km (66 mi)NW of epicenterSan Jose(pop: 4,530)II: Very weakProvince of Cagayan, Cagayan ValleyPhilippines108 km (67 mi)W of epicenterTuguegarao(pop: 167,300)II: Very weakProvince of Cagayan, Cagayan ValleyPhilippines108 km (67 mi)W of epicenterMabini(pop: 4,460)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines112 km (69 mi)W of epicenterNattapian(pop: 11,900)II: Very weakProvince of Cagayan, Cagayan ValleyPhilippines112 km (70 mi)W of epicenterSolana(pop: 71,500)II: Very weakProvince of Cagayan, Cagayan ValleyPhilippines114 km (71 mi)SW of epicenterMinante Segundo(pop: 6,700)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines117 km (73 mi)W of epicenterQuezon(pop: 9,490)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines119 km (74 mi)W of epicenterRoxas(pop: 16,600)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines120 km (75 mi)SW of epicenterSan Guillermo(pop: 3,930)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines121 km (75 mi)W of epicenterSan Manuel(pop: 9,870)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines124 km (77 mi)NW of epicenterGonzaga(pop: 7,230)II: Very weakProvince of Cagayan, Cagayan ValleyPhilippines126 km (78 mi)NW of epicenterAlcala(pop: 4,670)II: Very weakProvince of Cagayan, Cagayan ValleyPhilippines127 km (79 mi)SW of epicenterAlicia(pop: 74,700)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines132 km (82 mi)SW of epicenterSan Mateo(pop: 16,200)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines132 km (82 mi)W of epicenterTabuk(pop: 122,800)II: Very weakKalinga, Cordillera Administrative RegionPhilippines135 km (84 mi)NW of epicenterSanta Ana(pop: 6,320)II: Very weakProvince of Cagayan, Cagayan ValleyPhilippines138 km (86 mi)W of epicenterPiat(pop: 5,960)II: Very weakProvince of Cagayan, Cagayan ValleyPhilippines139 km (86 mi)NW of epicenterMagapit(pop: 11,200)II: Very weakProvince of Cagayan, Cagayan ValleyPhilippines140 km (87 mi)NW of epicenterLasam(pop: 6,350)II: Very weakProvince of Cagayan, Cagayan ValleyPhilippines141 km (88 mi)SW of epicenterRamon(pop: 36,300)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines142 km (88 mi)SW of epicenterMasaya Sur(pop: 5,520)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines145 km (90 mi)SW of epicenterSantiago(pop: 108,400)II: Very weakProvince of Isabela, Cagayan ValleyPhilippines151 km (94 mi)SW of epicenterAglipay(pop: 30,700)II: Very weakProvince of Quirino, Cagayan ValleyPhilippines152 km (94 mi)W of epicenterTabuk(pop: 122,800)II: Very weakKalinga, Cordillera Administrative RegionPhilippines153 km (95 mi)SW of epicenterSaguday(pop: 7,460)II: Very weakProvince of Quirino, Cagayan ValleyPhilippines157 km (97 mi)NW of epicenterAparri(pop: 68,400)II: Very weakProvince of Cagayan, Cagayan ValleyPhilippines159 km (99 mi)SW of epicenterMaddela(pop: 9,750)II: Very weakProvince of Quirino, Cagayan ValleyPhilippines161 km (100 mi)SW of epicenterDiadi(pop: 15,600)II: Very weakProvince of Nueva Vizcaya, Cagayan ValleyPhilippines204 km (127 mi)NW of epicenterSanchez-Mira(pop: 26,300)I: Not feltProvince of Cagayan, Cagayan ValleyPhilippines360 km (224 mi)SW of epicenterManila(pop: 1,600,000)I: Not feltCapital, National Capital RegionPhilippinesNotes:(*) 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 GMT2026-08-20EpicenterAgency4.010 km6.2 mi(*)12:57:00044 km N 82° E of Divilacan (Isabela)PHIVOLCS (Philippine Institute of Volcanology and Seismology)4.010 km6.2 mi(*)12:57:00Luzon, Philippines0 km (0 mi) epicenter difference with PHIVOLCSRaspberryShake (RaspberryShake)Notes:(*) A depth given as 10 km often means that the the depth of the quake could be not determined with sufficient accuracy.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 08:57 pm (GMT +8)9 minutes ago4.010 km0 km - This quakePhilippine Sea, 91 km E of Ilagan, PhilippinesMain Shock (this quake)MoreMap of aftershocksPrevious quakes in the same area of this earthquake9 minutes agoAug 20, 2026 12:57 GMT / Aug 20, 2026 08:57 pm (GMT +8)Lat / Lng: 17.38 / 122.71: Philippines: 044 km N 82° E of Divilacan (Isabela)Source: PHIVOLCSOther sources: RaspberryShake: 4.0 / 10 kmDetail info | You felt it? - Report it!',4.0,40, '#bb202a', 0.9,1.5, '#bb202a', 0.27);map2.addToMap('thisQuake',17.38,122.71,'9 minutes ago: Mag. 4.0, Philippines: 044 km N 82° E of Divilacan (Isabela)','Earthquake: Mag 4.0 / 10 km (6.2 mi) depth9 minutes agoAug 20, 2026 12:57 GMT / Aug 20, 2026 08:57 pm (GMT +8)Lat / Lng: 17.38 / 122.71: Philippines: 044 km N 82° E of Divilacan (Isabela)Source: PHIVOLCSOther sources: RaspberryShake: 4.0 / 10 kmDetail info | You felt it? - Report it!','default'); // this will be local to this table obj 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://server2.allquakes.com/api/getPrevious.php?quakeId=23297800","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("sectionPreviousCWrap")||d.getElementById("placeholder_largestQText")||d.getElementById("qTableOlder");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)})();]]>