Moderate magnitude 4.1 earthquake at 49 km depth3 Oct 01:20 UTC: First to report: EMSC after 17 minutes.3 Oct 01:20: Now using data updates from USGSUpdate Sat, 3 Oct 2026, 01:21Magnitude 4.1 earthquake strikes near Adak, Aleutians West, Alaska, USAThe United States Geological Survey reported a magnitude 4.1 quake in the United States near Adak, Aleutians West, Alaska, only 18 minutes ago. The earthquake hit in the afternoon on Friday, October 2nd, 2026, at 4:03 pm local time at a moderately shallow depth of 31 miles. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 4.1 earthquake as well.Weak shaking might have been felt in Adak (pop. 330) located 21 miles from the epicenter.If you were or still are in this area during the quake help others with your feedback and report it here.Download the Volcanoes & Earthquakes app and get one of the fastest seismic alerts online: Android | iOSI didn't feel itI felt this quakeEarthquake detailsDate & timeOct 3, 2026 01:03:12 UTC - Local time at epicenterFriday, Oct 2, 2026, at 04:03 pm (GMT -9)Statusconfirmed (manually revised)Magnitude4.09Depth49 kmEpicenter latitude / longitude51.5689°N / 176.6858°WAleutians West Census Area, Alaska, United StatesSeismic antipode51.5689°S / 3.3142°EQuality33 seismic stationsShaking intensityIII Weak shaking near epicenterFelt0 reportsPrimary data sourceUSGS (United States Geological Survey)Nearest volcanoMoffett (42 km / 26 mi)Weather at epicenter at time of quakeOvercast Clouds 9.5°C (49 F), humidity: 82%, wind: 4 m/s (7 kts) from SSEEstimated 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 energy31 minutes agoOct 3, 2026 01:03 GMT / Oct 2, 2026 04:03 pm (GMT -9)Lat / Lng: 51.5689 / -176.6858: 34 km S of Adak, AlaskaSource: USGSOther sources: EMSC: 4.1 / 49 kmDetail info | You felt it? - Report it!';storedMarkers.push(['quake-23407090',51.56890,-176.68580,'31 minutes ago: Mag. 4.1, 34 km S of Adak, Alaska',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]Ground shaking from this quakeMap of estimated ground shaking (source:USGS)Ground accelleration map for this quakeMap of estimated ground accelleration (source:USGS)Most recent quakes Top 20 past 24 hrs Quakes in the US AlaskaNearby placesThe closest larger town where the quake might have been felt is Adak, a town with 332 inhabitants in the United States, in 34 km (21 mi) distance north of the epicenter. People likely experienced weak shaking there.The following table shows some of the places that might have been affected (or not) by the shaking.DistancePlaceMax. shaking intensity(*)RegionCountry34 km (21 mi)N of epicenterAdak(pop: 332)III: WeakAleutians West Census Area, AlaskaUnited States184 km (115 mi)NE of epicenterAtka(pop: 64)II: Very weakAleutians West Census Area, AlaskaUnited StatesNotes:(*) 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 GMT2026-10-3EpicenterAgency4.0949 km31 mi±3.2 km01:03:12.9934 km S of Adak, AlaskaEpicenter uncertainty: ± 5.5 kmUSGS (United States Geological Survey)4.0949 km31 mi01:03:12.99±1.67sANDREANOF ISLANDS, ALEUTIAN IS.0 km (0 mi) epicenter difference with USGSEpicenter uncertainty: ± 14 kmEMSC (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)Oct 2, 2026 04:03 pm (GMT -9)31 minutes ago4.149 km0 km - This quakeBering Sea, 15 mi S of Adak Island, Aleutians West Census Area, Alaska, United StatesMain Shock (this quake)MoreMap of aftershocksEarthquake statisticsAverage number of earthquakesBased on data from the past 26 years and our earthquake archive back to 1900, there are about 2,500 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 7 or higher: 0.06 quakes per year (or 1 quake every 18.2 years)Mag. 6 or higher: 0.53 quakes per year (or 1 quake every 1.9 years)Mag. 5 or higher: 4.6 quakes per yearMag. 4 or higher: 27.7 quakes per yearMag. 3 or higher: 167 quakes per year (or 13.9 quakes per month)Mag. 2 or higher: 689 quakes per year (or 57 quakes per month)Mag. 1 or higher: 1,700 quakes per year (or 4.8 quakes per day)The area where this quake occurred has a very high level of seismic activity. It has had at least 7 quakes above magnitude 7 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 15 to 20 years.Number of quakes per yearPrevious quakes in the same area of this earthquake