(Unconfirmed) Moderate magnitude 4.0 earthquake at 50 km depth6 Aug 23:13 UTC: First to report: RaspberryShake after 5 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeAug 6, 2026 23:08:00 UTC - Local time at epicenterFriday, Aug 7, 2026, at 08:08 am (GMT +9)Statusunconfirmed (automatic detection)Magnitude4.0Depth50 kmEpicenter latitude / longitude37.8°N / 141.7°EJapanSeismic antipode37.8°S / 38.3°WShaking intensityIII Weak shaking near epicenterFelt0 reportsPrimary data sourceRaspberryShake (RaspberryShake)Nearest volcanoAoso (101 km / 63 mi)Estimated seismic energy released6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 tons of TNT) | equivalent to ONE quake of magnitude 4.0 | about seismic energy5 minutes agoAug 6, 2026 23:08 GMT / Aug 7, 2026 08:08 am (GMT +9)Lat / Lng: 37.8 / 141.7: Near East Coast of Honshu, JapanSource: RaspberryShakeDetail info | You felt it? - Report it!';storedMarkers.push(['quake-23250525',37.80000,141.70000,'5 minutes ago: Mag. 4.0, 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 Sendai, a city of 1.1 million people in Japan, in 90 km (56 mi) distance northwest 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 Japan, Tokyo, 295 km (183 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(*)RegionCountry66 km (41 mi)W of epicenterMinami-Soma(pop: 59,000)II: Very weakMinamisoma Shi, FukushimaJapan68 km (42 mi)W of epicenterSoma(pop: 34,900)II: Very weakSoma Shi, FukushimaJapan71 km (44 mi)SW of epicenterNamie(pop: 21,900)II: Very weakFutaba-gun, FukushimaJapan71 km (44 mi)W of epicenterSakamoto(pop: 12,000)II: Very weakWatari-gun, MiyagiJapan75 km (47 mi)N of epicenterOnagawa Cho(pop: 6,430)II: Very weakOshika Gun, MiyagiJapan77 km (48 mi)NW of epicenterIshinomaki(pop: 140,200)II: Very weakMiyagiJapan78 km (48 mi)NW of epicenterShobudahama(pop: 18,100)II: Very weakMiyagi Gun, MiyagiJapan79 km (49 mi)W of epicenterWatari(pop: 33,500)II: Very weakMiyagiJapan80 km (49 mi)SW of epicenterTomioka(pop: 2,130)II: Very weakFutaba-gun, FukushimaJapan81 km (50 mi)NW of epicenterIwanuma(pop: 44,100)II: Very weakMiyagiJapan82 km (51 mi)NW of epicenterYamoto(pop: 32,000)II: Very weakHigashimatsushima Shi, MiyagiJapan82 km (51 mi)NW of epicenterHigashimatsushima(pop: 39,100)II: Very weakMiyagiJapan82 km (51 mi)NW of epicenterShiogama(pop: 52,700)II: Very weakMiyagiJapan82 km (51 mi)NW of epicenterNatori-shi(pop: 78,700)II: Very weakNatori Shi, MiyagiJapan83 km (51 mi)NW of epicenterTagajo-shi(pop: 62,800)II: Very weakTagajo Shi, MiyagiJapan83 km (52 mi)W of epicenterMarumori(pop: 13,100)II: Very weakIgu-gun, MiyagiJapan84 km (52 mi)W of epicenterKakuda(pop: 33,200)II: Very weakMiyagiJapan85 km (53 mi)NW of epicenterMatsushima(pop: 16,400)II: Very weakMiyagi Gun, MiyagiJapan87 km (54 mi)NW of epicenterRifu(pop: 36,000)II: Very weakMiyagi Gun, MiyagiJapan89 km (55 mi)W of epicenterOkawara(pop: 23,600)II: Very weakShibata-gun, MiyagiJapan90 km (56 mi)NW of epicenterSendai(pop: 1,096,700)II: Very weakMiyagiJapan93 km (58 mi)NW of epicenterMurata(pop: 38,300)II: Very weakShibata-gun, MiyagiJapan96 km (60 mi)NW of epicenterWakuya(pop: 15,800)II: Very weakToda Gun, MiyagiJapan97 km (60 mi)W of epicenterYanagawamachi-saiwaicho(pop: 20,800)II: Very weakDate-shi, FukushimaJapan97 km (60 mi)NW of epicenterTomiya(pop: 52,400)II: Very weakMiyagiJapan98 km (61 mi)W of epicenterShiroishi(pop: 33,300)II: Very weakMiyagiJapan99 km (61 mi)NW of epicenterKogota-ekimae(pop: 24,000)II: Very weakToda Gun, MiyagiJapan105 km (66 mi)W of epicenterDate(pop: 59,600)II: Very weakFukushimaJapan108 km (67 mi)NW of epicenterFurukawa(pop: 76,300)II: Very weakOsaki Shi, MiyagiJapan108 km (67 mi)NW of epicenterOsaki(pop: 128,800)II: Very weakOsaki Shi, MiyagiJapan109 km (67 mi)W of epicenterFukushima(pop: 294,200)II: Very weakFukushimaJapan110 km (69 mi)SW of epicenterIwaki(pop: 357,300)II: Very weakFukushimaJapan112 km (69 mi)NW of epicenterTome(pop: 77,900)II: Very weakMiyagiJapan114 km (71 mi)W of epicenterNihommatsu(pop: 53,600)II: Very weakNihonmatsu Shi, FukushimaJapan122 km (76 mi)NW of epicenterKurihara(pop: 66,600)II: Very weakMiyagiJapan124 km (77 mi)W of epicenterKoriyama(pop: 327,700)II: Very weakKoriyama Shi, FukushimaJapan126 km (79 mi)NW of epicenterYamagata(pop: 248,800)II: Very weakYamagataJapan134 km (83 mi)N of epicenterIchinoseki(pop: 114,500)II: Very weakIwateJapan140 km (87 mi)W of epicenterYonezawa(pop: 94,500)II: Very weakYamagataJapan295 km (183 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 GMT2026-08-6EpicenterAgency4.050 km31 mi23:08:00Near East Coast of Honshu, JapanRaspberryShake (RaspberryShake)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)Aug 7, 2026 08:08 am (GMT +9)5 minutes ago4.050 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 8,000 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 7 or higher: 0.14 quakes per year (or 1 quake every 7.1 years)Mag. 6 or higher: 1.61 quakes per yearMag. 5 or higher: 14.1 quakes per yearMag. 4 or higher: 100 quakes per year (or 8.3 quakes per month)Mag. 3 or higher: 444 quakes per year (or 37 quakes per month)Mag. 2 or higher: 1,600 quakes per year (or 4.4 quakes per day)Mag. 1 or higher: 6,500 quakes per year (or 17.9 quakes per day)The area where this quake occurred has a very high level of seismic activity. It has had at least 19 quakes above magnitude 7 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 5 to 10 years.Number of quakes per yearPrevious quakes in the same area of this earthquake