Moderate magnitude 4.7 earthquake at 50 km depth15 Aug 01:17 UTC: First to report: RaspberryShake after 6 minutes.15 Aug 01:23: Now using data updates from GFZ15 Aug 01:26: Now using data updates from USGSI didn't feel itI felt this quakeEarthquake detailsDate & timeAug 15, 2026 01:10:51 UTC - Local time at epicenterSaturday, Aug 15, 2026, at 01:10 am (Universal Time GMT +0)Statusconfirmed (manually revised)Magnitude4.70Depth50 kmEpicenter latitude / longitude37.2084°N / 141.1138°EIwaki-shi, Fukushima, JapanSeismic antipode37.2084°S / 38.886°WQuality45 seismic stationsShaking intensityIII Weak shaking near epicenterFelt0 reportsPrimary data sourceUSGS (United States Geological Survey)Nearest volcanoAdatara (101 km / 63 mi)Weather at epicenter at time of quakeOvercast Clouds 24.2°C (76 F), humidity: 87%, wind: 4 m/s (8 kts) from ESEEstimated seismic energy released7.1 x 1011 joules (197 megawatt hours, equivalent to 169 tons of TNT) | equivalent to ONE quake of magnitude 4.7 | about seismic energy18 minutes agoAug 15, 2026 01:10 GMT / Aug 15, 2026 01:10 am (Universal Time)Lat / Lng: 37.2084 / 141.1138: 16 km SSE of Tomioka, JapanSource: USGSOther sources: RaspberryShake: 4.5 / 50 km, GFZ: 4.7 / 60 km, 1 more...Detail info | You felt it? - Report it!';storedMarkers.push(['quake-23272850',37.20840,141.11380,'18 minutes ago: Mag. 4.7, 16 km SSE of Tomioka, 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 27 km (17 mi) distance southwest 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 Japan, Tokyo, 211 km (131 mi) away from the epicenter, the earthquake was probably felt as very weak shaking.The following table shows some of the places that might have been affected (or not) by the shaking.DistancePlaceMax. shaking intensity(*)RegionCountry12 km (7 mi)W of epicenterOyauchi(pop: 5,410)III: WeakFutaba-gun, FukushimaJapan15 km (9 mi)NW of epicenterIde(pop: 3,710)III: WeakFutaba-gun, FukushimaJapan27 km (17 mi)SW of epicenterIwaki(pop: 357,300)III: WeakFukushimaJapan32 km (20 mi)N of epicenterNamie(pop: 21,900)III: WeakFutaba-gun, FukushimaJapan43 km (27 mi)W of epicenterOno-niimachi(pop: 9,470)III: WeakTamura-gun, FukushimaJapan47 km (29 mi)W of epicenterKitakata(pop: 5,830)III: WeakIshikawa-gun, FukushimaJapan48 km (30 mi)N of epicenterMinami-Soma(pop: 59,000)III: WeakMinamisoma Shi, FukushimaJapan52 km (32 mi)NW of epicenterTamura(pop: 35,200)III: WeakFukushimaJapan54 km (34 mi)NW of epicenterFunehikimachi-funehiki(pop: 23,500)III: WeakTamura-shi, FukushimaJapan57 km (35 mi)SW of epicenterKitaibaraki(pop: 41,800)III: WeakIbarakiJapan59 km (37 mi)W of epicenterIshikawa(pop: 18,800)III: WeakFukushimaJapan61 km (38 mi)NW of epicenterMiharu(pop: 17,500)III: WeakTamura-gun, FukushimaJapan65 km (40 mi)SW of epicenterTakahagi(pop: 27,700)III: WeakIbarakiJapan65 km (41 mi)W of epicenterSukagawa(pop: 75,000)III: WeakFukushimaJapan67 km (42 mi)N of epicenterSoma(pop: 34,900)III: WeakSoma Shi, FukushimaJapan68 km (42 mi)W of epicenterKoriyama(pop: 327,700)III: WeakKoriyama Shi, FukushimaJapan71 km (44 mi)W of epicenterYabuki(pop: 17,300)III: WeakNishishirakawa-gun, FukushimaJapan72 km (44 mi)NW of epicenterMotomiya(pop: 30,200)III: WeakFukushimaJapan73 km (45 mi)NW of epicenterNihommatsu(pop: 53,600)III: WeakNihonmatsu Shi, FukushimaJapan76 km (47 mi)W of epicenterShirakawa(pop: 59,500)III: WeakFukushimaJapan79 km (49 mi)SW of epicenterHitachi(pop: 174,500)III: WeakIbarakiJapan83 km (52 mi)NW of epicenterFukushima(pop: 294,200)III: WeakFukushimaJapan83 km (52 mi)NW of epicenterFukushima(pop: 294,200)III: WeakFukushimaJapan84 km (52 mi)SW of epicenterDaigo(pop: 15,700)III: WeakKuji-gun, IbarakiJapan84 km (52 mi)NW of epicenterHobaramachi(pop: 24,500)III: WeakDate-shi, FukushimaJapan84 km (52 mi)W of epicenterKumakura(pop: 20,800)III: WeakNishishirakawa-gun, FukushimaJapan85 km (53 mi)NW of epicenterYanagawamachi-saiwaicho(pop: 20,800)III: WeakDate-shi, FukushimaJapan87 km (54 mi)NW of epicenterDate(pop: 59,600)III: WeakFukushimaJapan90 km (56 mi)SW of epicenterHitachi-ota(pop: 48,600)III: WeakHitachi-ota Shi, IbarakiJapan90 km (56 mi)N of epicenterKakuda(pop: 33,200)III: WeakMiyagiJapan95 km (59 mi)N of epicenterWatari(pop: 33,500)III: WeakMiyagiJapan96 km (59 mi)SW of epicenterHitachiomiya(pop: 39,300)III: WeakHitachi-omiya Shi, IbarakiJapan96 km (60 mi)SW of epicenterFunaishikawa(pop: 35,300)III: WeakNaka-gun, IbarakiJapan96 km (60 mi)SW of epicenterOmiya(pop: 27,600)III: WeakHitachi-omiya Shi, IbarakiJapan96 km (60 mi)W of epicenterNasushiobara(pop: 115,800)III: WeakNasu-gun, TochigiJapan98 km (61 mi)W of epicenterKuroiso(pop: 61,200)III: WeakNasu-shiobara Shi, TochigiJapan99 km (61 mi)NW of epicenterShiroishi(pop: 33,300)III: WeakMiyagiJapan99 km (62 mi)N of epicenterOkawara(pop: 23,600)III: WeakShibata-gun, MiyagiJapan195 km (121 mi)SW of epicenterSaitama(pop: 1,324,900)II: Very weakSaitamaJapan211 km (131 mi)SW of epicenterTokyo(pop: 9,733,300)II: Very weakTokyoJapanNotes:(*) 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 GMT2026-08-15EpicenterAgency4.750 km31 mi01:10:51.63516 km SSE of Tomioka, JapanUSGS (United States Geological Survey)4.550 km31 mi01:10:00Near East Coast of Honshu, Japan14 km (8.9 mi) epicenter difference with USGSRaspberryShake (RaspberryShake)4.760 km37 mi01:10:53.53Near East Coast of Honshu, Japan9.2 km (5.7 mi) epicenter difference with USGSGFZ (German Research Centre for Geosciences)4.750 km31 mi01:10:51.635NEAR EAST COAST OF HONSHU, JAPAN0 km (0 mi) epicenter difference with USGSEMSC (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 5 km2 (2 square miles) as a first-order estimate. The length of the rupture zone thus was probably around 4 km (2 mi).[More info]Recorded aftershocks, latest first (0 quake)Aug 15, 2026 01:10 am (Universal Time)18 minutes ago4.750 km0 km - This quake16 km SSE of Tomioka, 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 7,900 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 7 or higher: 0.05 quakes per year (or 1 quake every 21.3 years)Mag. 6 or higher: 0.6 quakes per year (or 1 quake every 1.7 years)Mag. 5 or higher: 13.3 quakes per yearMag. 4 or higher: 86 quakes per year (or 7.2 quakes per month)Mag. 3 or higher: 404 quakes per year (or 33.7 quakes per month)Mag. 2 or higher: 1,500 quakes per year (or 4 quakes per day)Mag. 1 or higher: 5,900 quakes per year (or 16.1 quakes per day)The area where this quake occurred has a very high level of seismic activity. It has had at least 6 quakes above magnitude 7 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 20 to 25 years.Number of quakes per yearPrevious quakes in the same area of this earthquake