Moderate mag. 4.1 earthquake - Rat Islands, Aleutian Islands, on Sunday, Jul 19, 2026, at 09:36 pm (Universal Time)

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The quake had a very shallow depth of 35 km (21 mi) and was not felt (or at least not reported so).Quake Data | Interactive map | Seismograms | User reports | Aftershocks | Earlier quakes here | Quakes in the US | AlaskaHint: Click on the image to see different maps of this quake!Moderate magnitude 4.1 earthquake at 35 km depth19 Jul 22:22 UTC: First to report: EMSC after 46 minutes.19 Jul 22:23: Now using data updates from USGSI didn't feel itI felt this quakeEarthquake detailsDate & timeJul 19, 2026 21:36:51 UTC - Local time at epicenterSunday, Jul 19, 2026, at 12:36 pm (GMT -9)Statusconfirmed (manually revised)Magnitude4.09Depth34.5 kmEpicenter latitude / longitude51.9557°N / 176.3277°EAlaska, United StatesSeismic antipode51.9557°S / 3.672°WQuality40 seismic stationsShaking intensityIII Weak shaking near epicenterFelt0 reportsPrimary data sourceUSGS (United States Geological Survey)Nearest volcanoBuldir (52 km / 32 mi)Weather at epicenter at time of quakeOvercast Clouds 7.8°C (46 F), humidity: 99%, wind: 4 m/s (8 kts) from WEstimated 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 energy1 hour and 0 minutes agoJul 19, 2026 21:36 GMT / Jul 19, 2026 12:36 pm (GMT -9)Lat / Lng: 51.9557 / 176.3277: 235 km ESE of Attu Station, AlaskaSource: USGSOther sources: EMSC: 4.1 / 35 kmDetail info | You felt it? - Report it!';storedMarkers.push(['quake-23199352',51.95570,176.32770,'1 hour and 0 minutes ago: Mag. 4.1, 235 km ESE of Attu Station, 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+="&notFelt=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 near the epicenter is Attu Station, a town with 21 inhabitants in the United States, in 235 km (146 mi) distance to the northwest, but it is unlikely that the quake was felt there. DistancePlaceMax. shaking intensity(*)RegionCountry235 km (146 mi)NW of epicenterAttu Station(pop: 21)I: Not feltAleutians 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 GMT2026-07-19EpicenterAgency4.0935 km21 mi21:36:51.845235 km ESE of Attu Station, AlaskaUSGS (United States Geological Survey)4.0935 km21 mi21:36:51.845RAT ISLANDS, ALEUTIAN ISLANDS0 km (0 mi) epicenter difference with USGSEMSC (European-Mediterranean Seismological Centre)"; HTMLcontent += ""; mainMap.addToMap("station"+id, lat, lon, title,HTMLcontent); mainMap.map.panTo([lat,lon]); document.getElementById("map_canvas").scrollIntoView();}]]>SeismogramsSeismic station: Saddle, Little Sitkin Volcano, Alaska (LSSA/AV network) | Distance from quake: 150 km / 93 mi | Show on map | Station InfoSeismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Bandpass filter applied: 0.2-5.0 Hz. Source: NSF SAGE Facility IRISWS timeseriesplot Web ServiceSeismic station: Northwest, Little Sitkin Volcano, Alaska (LSNW/AV network) | Distance from quake: 150 km / 93 mi | Show on map | Station InfoShow moreAftershocks 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)Jul 19, 2026 12:36 pm (GMT -9)1 hour and 0 minutes ago4.135 km0 km - This quakeBering Sea, 33 mi SE of Buldir Island, Aleutians West Census Area, Alaska, United StatesMain Shock (this quake)MoreMap of aftershocksPrevious quakes in the same area of this earthquake1 hour and 0 minutes agoJul 19, 2026 21:36 GMT / Jul 19, 2026 12:36 pm (GMT -9)Lat / Lng: 51.9557 / 176.3277: 235 km ESE of Attu Station, AlaskaSource: USGSOther sources: EMSC: 4.1 / 35 kmDetail info | You felt it? - Report it!',4.1,41, '#bb202a', 0.9,1.5, '#bb202a', 0.27);map2.addToMap('thisQuake',51.9557,176.3277,'1 hour and 0 minutes ago: Mag. 4.1, 235 km ESE of Attu Station, Alaska','Earthquake: Mag 4.1 / 35 km (21 mi) depth1 hour and 0 minutes agoJul 19, 2026 21:36 GMT / Jul 19, 2026 12:36 pm (GMT -9)Lat / Lng: 51.9557 / 176.3277: 235 km ESE of Attu Station, AlaskaSource: USGSOther sources: EMSC: 4.1 / 35 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=23199352","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)})();]]>Sources: VolcanoDiscovery / VolcanoAdventures and other sources as noted.Use of material: Most text and images on our websites are owned by us. Re-use is generally not permitted without authorization. Contact us for licensing rights.