Moderate magnitude 4.1 earthquake at 50 km depth21 Apr 04:56 UTC: First to report: EMSC after 6 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeApr 21, 2026 04:50:30 UTC - Local time at epicenterTuesday, Apr 21, 2026, at 01:50 pm (GMT +9)Statuspreliminary (automatic detection)Magnitude4.09Depth50 kmEpicenter latitude / longitude37.2°N / 141.4°EFukushima, JapanSeismic antipode37.2°S / 38.6°WShaking intensityIII Weak shaking near epicenterFelt0 reportsPrimary data sourceEMSC (European-Mediterranean Seismological Centre)Nearest volcanoAdatara (110 km / 68 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 energy6 minutes agoApr 21, 2026 04:50 GMT / Apr 21, 2026 01:50 pm (GMT +9)Lat / Lng: 37.2 / 141.4: Near East Coast OF Honshu, JapanSource: EMSCDetail info | You felt it? - Report it!';storedMarkers.push(['quake-22930029',37.20000,141.40000,'6 minutes ago: Mag. 4.1, Near East Coast OF Honshu, Japan',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 JapanNearby placesThe closest larger town where the quake might have been felt is Iwaki, a city with more than 360,000 inhabitants in Japan, in 49 km (30 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 Japan, Tokyo, 227 km (141 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(*)RegionCountry37 km (23 mi)W of epicenterOyauchi(pop: 5,410)III: WeakFutaba-gun, FukushimaJapan38 km (24 mi)W of epicenterIde(pop: 3,710)III: WeakFutaba-gun, FukushimaJapan47 km (29 mi)NW of epicenterNamie(pop: 21,900)II: Very weakFutaba-gun, FukushimaJapan49 km (30 mi)W of epicenterIwaki(pop: 357,300)II: Very weakFukushimaJapan52 km (33 mi)W of epicenterShimokawauchi(pop: 2,040)II: Very weakFutaba-gun, FukushimaJapan60 km (38 mi)NW of epicenterMinami-Soma(pop: 59,000)II: Very weakMinamisoma Shi, FukushimaJapan69 km (43 mi)W of epicenterOno-niimachi(pop: 9,470)II: Very weakTamura-gun, FukushimaJapan72 km (45 mi)W of epicenterKitakata(pop: 5,830)II: Very weakIshikawa-gun, FukushimaJapan74 km (46 mi)SW of epicenterKitaibaraki(pop: 41,800)II: Very weakIbarakiJapan75 km (47 mi)W of epicenterTamura(pop: 35,200)II: Very weakFukushimaJapan77 km (48 mi)W of epicenterTakanuki(pop: 4,830)II: Very weakIshikawa-gun, FukushimaJapan78 km (48 mi)W of epicenterFunehikimachi-funehiki(pop: 23,500)II: Very weakTamura-shi, FukushimaJapan78 km (48 mi)NW of epicenterSoma(pop: 34,900)II: Very weakSoma Shi, FukushimaJapan79 km (49 mi)NW of epicenterYamakiya(pop: 12,200)II: Very weakDate-gun, FukushimaJapan80 km (50 mi)NW of epicenterKusano(pop: 1,320)II: Very weakSoma-gun, FukushimaJapan81 km (50 mi)SW of epicenterTakahagi(pop: 27,700)II: Very weakIbarakiJapan84 km (52 mi)W of epicenterIshikawa(pop: 18,800)II: Very weakFukushimaJapan85 km (53 mi)W of epicenterMiharu(pop: 17,500)II: Very weakTamura-gun, FukushimaJapan91 km (56 mi)W of epicenterSukagawa(pop: 75,000)II: Very weakFukushimaJapan92 km (57 mi)W of epicenterTanagura(pop: 13,800)II: Very weakHigashishirakawa-gun, FukushimaJapan93 km (58 mi)W of epicenterKoriyama(pop: 327,700)II: Very weakKoriyama Shi, FukushimaJapan94 km (59 mi)W of epicenterKasaishi(pop: 12,300)II: Very weakIwase-gun, FukushimaJapan94 km (59 mi)SW of epicenterHitachi(pop: 174,500)II: Very weakIbarakiJapan95 km (59 mi)W of epicenterMotomiya(pop: 30,200)II: Very weakFukushimaJapan95 km (59 mi)NW of epicenterNihommatsu(pop: 53,600)II: Very weakNihonmatsu Shi, FukushimaJapan96 km (60 mi)W of epicenterYabuki(pop: 17,300)II: Very weakNishishirakawa-gun, FukushimaJapan101 km (63 mi)W of epicenterShirakawa(pop: 59,500)II: Very weakFukushimaJapan102 km (63 mi)NW of epicenterHobaramachi(pop: 24,500)II: Very weakDate-shi, FukushimaJapan103 km (64 mi)NW of epicenterFukushima(pop: 294,200)II: Very weakFukushimaJapan103 km (64 mi)NW of epicenterFukushima(pop: 294,200)II: Very weakFukushimaJapan105 km (65 mi)NW of epicenterDate(pop: 59,600)II: Very weakFukushimaJapan117 km (73 mi)NW of epicenterNatori-shi(pop: 78,700)II: Very weakNatori Shi, MiyagiJapan118 km (73 mi)SW of epicenterHitachi-Naka(pop: 156,600)II: Very weakHitachinaka Shi, IbarakiJapan119 km (74 mi)SW of epicenterKatsuta(pop: 156,000)II: Very weakHitachinaka Shi, IbarakiJapan121 km (75 mi)W of epicenterNasushiobara(pop: 115,800)II: Very weakNasu-gun, TochigiJapan127 km (79 mi)SW of epicenterMito(pop: 270,700)II: Very weakIbarakiJapan128 km (79 mi)N of epicenterSendai(pop: 1,096,700)II: Very weakMiyagiJapan133 km (82 mi)W of epicenterAizu-Wakamatsu(pop: 118,200)II: Very weakFukushimaJapan212 km (132 mi)SW of epicenterSaitama(pop: 1,324,900)I: Not feltSaitamaJapan227 km (141 mi)SW of epicenterTokyo(pop: 9,733,300)I: Not feltTokyoJapanNotes:(*) 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 GMT2026-04-21EpicenterAgency4.0950 km31 mi04:50:30NEAR EAST COAST OF HONSHU, JAPANEMSC (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)Apr 21, 2026 01:50 pm (GMT +9)6 minutes ago4.150 km0 km - This quakeNear East Coast OF Honshu, JapanMain 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 8,800 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 7 or higher: 0.09 quakes per year (or 1 quake every 11.5 years)Mag. 6 or higher: 0.73 quakes per year (or 1 quake every 1.4 years)Mag. 5 or higher: 15.7 quakes per yearMag. 4 or higher: 97 quakes per year (or 8.1 quakes per month)Mag. 3 or higher: 426 quakes per year (or 35.5 quakes per month)Mag. 2 or higher: 1,600 quakes per year (or 4.4 quakes per day)Mag. 1 or higher: 6,700 quakes per year (or 18.4 quakes per day)The area where this quake occurred has a very high level of seismic activity. It has had at least 11 quakes above magnitude 7 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 10 to 15 years.Number of quakes per yearPrevious quakes in the same area of this earthquake