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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 | Central Visayas | Western Visayas | Zamboanga PeninsulaHint: Click on the image to see different maps of this quake!Moderate magnitude 4.0 earthquake at unknown depth20 Jul 16:35 UTC: First to report: PHIVOLCS after 9 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeJul 20, 2025 16:27:00 UTC - Local time at epicenter21 July 2025 - 12:27 AM (PST)Statuspreliminary (automatic detection)Magnitude4.0Depth10 kmEpicenter latitude / longitude9.05°N / 122.48°ECentral Visayas, PhilippinesSeismic antipode9.05°S / 57.52°WShaking intensityIV Light shaking near epicenterFelt0 reportsPrimary data sourcePHIVOLCS (Philippine Institute of Volcanology and Seismology)Nearest volcanoCuernos de Negros (79 km / 49 mi)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 energy9 minutes agoJul 20, 2025 16:27 GMT / 21 July 2025 - 12:27 AM (PST)Lat / Lng: 9.05 / 122.48: Philippines: 043 km S 24° W of Basay (Negros Oriental)Source: PHIVOLCSDetail info | You felt it? - Report it!';storedMarkers.push(['quake-21976303',9.05000,122.48000,'9 minutes ago: Mag. 4.0, Philippines: 043 km S 24° W of Basay (Negros Oriental)',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 Bayawan, a city with more than 120,000 inhabitants in the Philippines, in 50 km (31 mi) distance northeast 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 the Philippines, Manila, 639 km (397 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(*)RegionCountry44 km (27 mi)NE of epicenterBasay(pop: 4,310)III: WeakProvince of Negros Oriental, Central VisayasPhilippines48 km (30 mi)N of epicenterColipapa(pop: 7,680)III: WeakProvince of Negros Occidental, Western VisayasPhilippines48 km (30 mi)NE of epicenterManalongon(pop: 9,320)III: WeakProvince of Negros Oriental, Central VisayasPhilippines49 km (31 mi)E of epicenterBonawon(pop: 9,190)III: WeakProvince of Negros Oriental, Central VisayasPhilippines50 km (31 mi)NE of epicenterBayawan(pop: 122,700)III: WeakProvince of Negros Oriental, Central VisayasPhilippines53 km (33 mi)NE of epicenterSanta Catalina(pop: 26,500)III: WeakProvince of Negros Oriental, Central VisayasPhilippines56 km (35 mi)N of epicenterAsia(pop: 23,500)III: WeakProvince of Negros Occidental, Western VisayasPhilippines61 km (38 mi)E of epicenterSiaton(pop: 7,330)II: Very weakProvince of Negros Oriental, Central VisayasPhilippines64 km (40 mi)E of epicenterMantiquil(pop: 2,280)II: Very weakProvince of Negros Oriental, Central VisayasPhilippines65 km (41 mi)N of epicenterBacuyangan(pop: 7,510)II: Very weakProvince of Negros Occidental, Western VisayasPhilippines66 km (41 mi)NE of epicenterTabuan(pop: 5,390)II: Very weakProvince of Negros Oriental, Central VisayasPhilippines76 km (47 mi)E of epicenterMayabon(pop: 6,520)II: Very weakProvince of Negros Oriental, Central VisayasPhilippines77 km (48 mi)N of epicenterManlucahoc(pop: 5,000)II: Very weakProvince of Negros Occidental, Western VisayasPhilippines79 km (49 mi)N of epicenterSipalay(pop: 24,000)II: Very weakProvince of Negros Occidental, Western VisayasPhilippines79 km (49 mi)NE of epicenterBalayong(pop: 2,470)II: Very weakProvince of Negros Oriental, Central VisayasPhilippines84 km (52 mi)NE of epicenterPamplona(pop: 11,800)II: Very weakProvince of Negros Oriental, Central VisayasPhilippines88 km (55 mi)NE of epicenterMabinay(pop: 5,510)II: Very weakProvince of Negros Oriental, Central VisayasPhilippines89 km (55 mi)SE of epicenterManukan(pop: 11,500)II: Very weakSulu SeaPhilippines89 km (55 mi)SE of epicenterManukan(pop: 11,500)II: Very weakProvince of Zamboanga del Norte, Zamboanga PeninsulaPhilippines89 km (55 mi)SE of epicenterPonot(pop: 6,620)II: Very weakProvince of Zamboanga del Norte, Zamboanga PeninsulaPhilippines91 km (56 mi)NE of epicenterTanjay(pop: 82,600)II: Very weakProvince of Negros Oriental, Central VisayasPhilippines92 km (57 mi)NE of epicenterBagtic(pop: 3,840)II: Very weakProvince of Negros Oriental, Central VisayasPhilippines93 km (58 mi)NE of epicenterBais(pop: 65,600)II: Very weakProvince of Negros Oriental, Central VisayasPhilippines99 km (61 mi)SE of epicenterIrasan(pop: 2,170)II: Very weakProvince of Zamboanga del Norte, Zamboanga PeninsulaPhilippines107 km (67 mi)NE of epicenterPayabon(pop: 3,600)II: Very weakProvince of Negros Oriental, Central VisayasPhilippines209 km (130 mi)NE of epicenterCebu City(pop: 964,200)I: Not feltProvince of Cebu, Central VisayasPhilippines639 km (397 mi)N of epicenterManila(pop: 1,600,000): 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!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 GMT2025-07-20EpicenterAgency4.010 km6.2 mi(*)16:27:00043 km S 24° W of Basay (Negros Oriental)PHIVOLCS (Philippine Institute of Volcanology and Seismology)4.010 km6.2 mi(*)16:27:00043 km S 24° W of Basay (Negros Oriental)0 km (0 mi) epicenter difference with PHIVOLCSPHIVOLCS (Philippine Institute of Volcanology and Seismology)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)21 July 2025 - 12:27 AM (PST)9 minutes ago4.010 km0 km - This quakePhilippines: 043 km S 24° W of Basay (Negros Oriental)Main Shock (this quake)MoreMap of aftershocksPrevious quakes in the same area of this earthquake9 minutes agoJul 20, 2025 16:27 GMT / 21 July 2025 - 12:27 AM (PST)Lat / Lng: 9.05 / 122.48: Philippines: 043 km S 24° W of Basay (Negros Oriental)Source: PHIVOLCSOther sources: PHIVOLCS: 4.0 / 10 kmDetail info | You felt it? - Report it!',4.0,40, '#bb202a', 0.9,1.5, '#bb202a', 0.27);map2.addToMap('thisQuake',9.05,122.48,'9 minutes ago: Mag. 4.0, Philippines: 043 km S 24° W of Basay (Negros Oriental)','Earthquake: Mag 4.0 / 10 km (6.2 mi) depth9 minutes agoJul 20, 2025 16:27 GMT / 21 July 2025 - 12:27 AM (PST)Lat / Lng: 9.05 / 122.48: Philippines: 043 km S 24° W of Basay (Negros Oriental)Source: PHIVOLCSOther sources: PHIVOLCS: 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)})(); })(); (async function(){while(typeof mkRequest=="undefined")await new Promise(r=>setTimeout(r,500));mkRequest("https://server2.allquakes.com/api/getPrevious.php?quakeId=21976303","get","",function(httpObj){let r=httpObj.responseText,d=document;if(""!=r&&200==httpObj.status){let o=JSON.parse(r);if(!o){d.getElementById("olderQuakesSection").remove();return};let table=d.getElementById("qTableOlder");table.innerHTML+=o.tableRows,qTableOlder.alternateBg(),d.getElementById("placeholder_largestQText").innerHTML=o.html,d.getElementById("sectionPreviousCWrap").style.display="",eval(o.js)}})})();]]>Sources: VolcanoDiscovery / VolcanoAdventures and other sources as noted.Use of material: Most text and images on our websites are owned by us. 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