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The quake had a very shallow depth of 27 km (17 mi) and was not felt (or at least not reported so).Quake Data | Interactive map | User reports | Aftershocks | Earlier quakes here | Quakes in Chile | Region del Biobio | Region de la Araucania | Region de NubleHint: Click on the image to see different maps of this quake!Moderate magnitude 4.1 earthquake at 27 km depth4 Jan 05:02 UTC: First to report: EMSC after 4 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeJan 4, 2026 04:58:40 UTC - Local time at epicenterSunday, Jan 4, 2026, at 04:58 am (Universal Time GMT +0)Statuspreliminary (automatic detection)Magnitude4.1Depth27 kmEpicenter latitude / longitude37.35°S / 73.81°WProvincia de Arauco, Region del Biobio, ChileSeismic antipode37.35°N / 106.19°EChinaShaking intensityIII Weak shaking near epicenterFelt0 reportsPrimary data sourceEMSC (European-Mediterranean Seismological Centre)Nearest volcanoCallaqui (217 km / 135 mi)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 energy4 minutes agoJan 4, 2026 04:58 GMT / Jan 4, 2026 04:58 am (Universal Time)Lat / Lng: -37.35 / -73.81: Offshore Bio-Bio, ChileSource: EMSCDetail info | You felt it? - Report it!';storedMarkers.push(['quake-22573039',-37.35000,-73.81000,'4 minutes ago: Mag. 4.1, Offshore Bio-Bio, Chile',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 ChileNearby placesThe closest larger town where the quake might have been felt is Talcahuano, a city with more than 250,000 inhabitants in Chile, in 93 km (58 mi) distance northeast 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 Chile, Santiago, 519 km (323 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(*)RegionCountry32 km (20 mi)SE of epicenterLebu(pop: 22,300)III: WeakArauco, Region del BiobioChile43 km (27 mi)E of epicenterCuranilahue(pop: 32,000)III: WeakArauco, Region del BiobioChile44 km (27 mi)SE of epicenterLos Alamos(pop: 19,500)III: WeakArauco, Region del BiobioChile45 km (28 mi)E of epicenterArauco(pop: 24,700)III: WeakRegion del BiobioChile62 km (39 mi)SE of epicenterCañete(pop: 20,200)III: WeakArauco, Region del BiobioChile63 km (39 mi)SE of epicenterCanete(pop: 31,800)II: Very weakArauco, Region del BiobioChile65 km (40 mi)NE of epicenterLota(pop: 47,300)II: Very weakConcepcion, Region del BiobioChile69 km (43 mi)NE of epicenterCoronel(pop: 92,900)II: Very weakConcepcion, Region del BiobioChile79 km (49 mi)E of epicenterSanta Juana(pop: 13,200)II: Very weakConcepcion, Region del BiobioChile84 km (52 mi)NE of epicenterChiguayante(pop: 84,700)II: Very weakConcepcion, Region del BiobioChile85 km (53 mi)NE of epicenterSan Pedro de la Paz(pop: 121,600)II: Very weakConcepcion, Region del BiobioChile88 km (55 mi)NE of epicenterHualqui(pop: 24,300)II: Very weakConcepcion, Region del BiobioChile89 km (55 mi)NE of epicenterConcepcion(pop: 223,600)II: Very weakConcepcion, Region del BiobioChile89 km (55 mi)NE of epicenterConcepcion(pop: 223,600)II: Very weakConcepcion, Region del BiobioChile90 km (56 mi)SE of epicenterContulmo(pop: 5,840)II: Very weakArauco, Region del BiobioChile93 km (58 mi)NE of epicenterTalcahuano(pop: 253,000)II: Very weakConcepcion, Region del BiobioChile97 km (61 mi)E of epicenterLaja(pop: 11,100)II: Very weakBiobio, Region del BiobioChile99 km (62 mi)NE of epicenterPenco(pop: 46,100)II: Very weakConcepcion, Region del BiobioChile100 km (62 mi)SE of epicenterPuren(pop: 11,800)II: Very weakProvincia de Malleco, Region de la AraucaniaChile102 km (63 mi)E of epicenterNacimiento(pop: 21,200)II: Very weakBiobio, Region del BiobioChile108 km (67 mi)SE of epicenterAngol(pop: 44,900)II: Very weakProvincia de Malleco, Region de la AraucaniaChile111 km (69 mi)NE of epicenterTome(pop: 53,200)II: Very weakConcepcion, Region del BiobioChile114 km (71 mi)E of epicenterYumbel(pop: 11,100)II: Very weakBiobio, Region del BiobioChile116 km (72 mi)E of epicenterNegrete(pop: 9,390)II: Very weakBiobio, Region del BiobioChile118 km (73 mi)NE of epicenterFlorida(pop: 8,920)II: Very weakConcepcion, Region del BiobioChile129 km (80 mi)E of epicenterLos Angeles(pop: 125,400)II: Very weakBiobio, Region del BiobioChile129 km (80 mi)E of epicenterCabrero(pop: 18,300)II: Very weakBiobio, Region del BiobioChile136 km (85 mi)NE of epicenterQuillon(pop: 17,500)II: Very weakDiguillin, Region de NubleChile137 km (85 mi)NE of epicenterCoelemu(pop: 15,700)II: Very weakItata, Region de NubleChile139 km (86 mi)SE of epicenterCollipulli(pop: 16,400)II: Very weakProvincia de Malleco, Region de la AraucaniaChile144 km (90 mi)E of epicenterMulchen(pop: 22,200)II: Very weakBiobio, Region del BiobioChile162 km (100 mi)E of epicenterSanta Barbara(pop: 13,400)II: Very weakBiobio, Region del BiobioChile163 km (101 mi)SE of epicenterVictoria(pop: 24,600)II: Very weakProvincia de Malleco, Region de la AraucaniaChile172 km (107 mi)SE of epicenterNueva Imperial(pop: 29,400)II: Very weakProvincia de Cautin, Region de la AraucaniaChile173 km (107 mi)NE of epicenterChillan(pop: 150,400)II: Very weakDiguillin, Region de NubleChile178 km (111 mi)SE of epicenterLautaro(pop: 21,600)II: Very weakProvincia de Cautin, Region de la AraucaniaChile187 km (116 mi)SE of epicenterTemuco(pop: 238,100)II: Very weakProvincia de Cautin, Region de la AraucaniaChile189 km (118 mi)SE of epicenterPadre Las Casas(pop: 76,100)II: Very weakProvincia de Cautin, Region de la AraucaniaChile203 km (126 mi)NE of epicenterCauquenes(pop: 38,500)I: Not feltRegion del MauleChile519 km (323 mi)NE of epicenterSantiago(pop: 4,837,300)I: Not feltSantiago MetropolitanChileNotes:(*) 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 GMT2026-01-4EpicenterAgency4.0927 km17 mi04:58:40OFFSHORE BIO-BIO, CHILEEMSC (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)Jan 4, 2026 04:58 am (Universal Time)4 minutes ago4.127 km0 km - This quakeOffshore Bio-Bio, ChileMain Shock (this quake)MoreMap of aftershocksPrevious quakes in the same area of this earthquake4 minutes agoJan 4, 2026 04:58 GMT / Jan 4, 2026 04:58 am (Universal Time)Lat / Lng: -37.35 / -73.81: Offshore Bio-Bio, ChileSource: EMSCDetail info | You felt it? - Report it!',4.1,41, '#bb202a', 0.9,1.5, '#bb202a', 0.27);map2.addToMap('thisQuake',-37.35,-73.81,'4 minutes ago: Mag. 4.1, Offshore Bio-Bio, Chile','Earthquake: Mag 4.1 / 27 km (17 mi) depth4 minutes agoJan 4, 2026 04:58 GMT / Jan 4, 2026 04:58 am (Universal Time)Lat / Lng: -37.35 / -73.81: Offshore Bio-Bio, ChileSource: EMSCDetail 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=22573039","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)}})})();]]>