(Unconfirmed) Moderate magnitude 4.6 earthquake at 50 km depth30 Aug 09:33 UTC: First to report: RaspberryShake after 7 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeAug 30, 2025 09:26:00 UTC - Local time at epicenterSaturday, Aug 30, 2025, at 06:26 pm (GMT +9)Statusunconfirmed (automatic detection)Magnitude4.6Depth50 kmEpicenter latitude / longitude39.3°N / 142.1°EKamaishi Shi, Iwate, JapanSeismic antipode39.3°S / 37.9°WShaking intensityIII Weak shaking near epicenterFelt0 reportsPrimary data sourceRaspberryShake (RaspberryShake)Nearest volcanoYakeishi (110 km / 68 mi)Estimated seismic energy released5 x 1011 joules (139 megawatt hours, equivalent to 120 tons of TNT) | equivalent to ONE quake of magnitude 4.6 | about seismic energy7 minutes agoAug 30, 2025 09:26 GMT / Aug 30, 2025 06:26 pm (GMT +9)Lat / Lng: 39.3 / 142.1: Near East Coast of Honshu, JapanSource: RaspberryShakeDetail info | You felt it? - Report it!';storedMarkers.push(['quake-22116057',39.30000,142.10000,'7 minutes ago: Mag. 4.6, 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 Morioka, a city with more than 290,000 inhabitants in Japan, in 93 km (58 mi) distance northwest of the epicenter. People likely experienced 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, 454 km (282 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(*)RegionCountry19 km (12 mi)NW of epicenterOtsuchi(pop: 11,600)III: WeakKamihei-gun, IwateJapan20 km (13 mi)W of epicenterKamaishi(pop: 43,100)III: WeakIwateJapan23 km (14 mi)NW of epicenterYamada(pop: 15,200)III: WeakShimohei-gun, IwateJapan41 km (25 mi)N of epicenterMiyako(pop: 51,200)III: WeakIwateJapan42 km (26 mi)SW of epicenterOfunato(pop: 35,500)III: WeakOfunato-shi, IwateJapan49 km (30 mi)W of epicenterTono(pop: 26,100)III: WeakTono Shi, IwateJapan49 km (31 mi)SW of epicenterRikuzen-Takata(pop: 18,300)III: WeakIwateJapan66 km (41 mi)NW of epicenterIwaizumi(pop: 8,990)III: WeakShimohei-gun, IwateJapan85 km (53 mi)W of epicenterKitakami(pop: 92,300)III: WeakIwateJapan85 km (53 mi)W of epicenterHanamaki(pop: 94,700)III: WeakIwateJapan85 km (53 mi)W of epicenterMizusawa(pop: 61,300)III: WeakOshu Shi, IwateJapan85 km (53 mi)W of epicenterKanegasaki(pop: 15,600)III: WeakIsawa-gun, IwateJapan90 km (56 mi)SW of epicenterMinamisanriku(pop: 12,200)III: WeakMotoyoshi Gun, MiyagiJapan93 km (58 mi)N of epicenterNoda(pop: 4,200)III: WeakKunohe-gun, IwateJapan93 km (58 mi)NW of epicenterMorioka(pop: 290,700)III: WeakIwateJapan93 km (58 mi)NW of epicenterMorioka(pop: 290,700)III: WeakIwateJapan94 km (58 mi)SW of epicenterIchinoseki(pop: 114,500)III: WeakIwateJapan100 km (62 mi)NW of epicenterTakizawa(pop: 55,300)III: WeakIwateJapan100 km (62 mi)NW of epicenterKuzumaki(pop: 5,630)III: WeakIwate-gun, IwateJapan103 km (64 mi)N of epicenterKuji(pop: 34,400)III: WeakIwateJapan105 km (65 mi)SW of epicenterTome(pop: 77,900)III: WeakMiyagiJapan105 km (65 mi)NW of epicenterShizukuishi(pop: 16,300)III: WeakIwate-gun, IwateJapan107 km (66 mi)NW of epicenterHachimantai(pop: 25,100)III: WeakIwateJapan113 km (70 mi)SW of epicenterKurihara(pop: 66,600)III: WeakMiyagiJapan120 km (75 mi)SW of epicenterIshinomaki(pop: 138,500)II: Very weakMiyagiJapan124 km (77 mi)SW of epicenterYamoto(pop: 32,000)II: Very weakHigashimatsushima Shi, MiyagiJapan125 km (77 mi)W of epicenterSemboku(pop: 25,900)II: Very weakAkitaJapan126 km (78 mi)SW of epicenterOsaki(pop: 128,800)II: Very weakOsaki Shi, MiyagiJapan127 km (79 mi)SW of epicenterHigashimatsushima(pop: 39,100)II: Very weakMiyagiJapan128 km (79 mi)SW of epicenterFurukawa(pop: 76,300)II: Very weakOsaki Shi, MiyagiJapan129 km (80 mi)NW of epicenterNinohe(pop: 23,500)II: Very weakIwateJapan133 km (83 mi)W of epicenterYokote(pop: 85,600)II: Very weakAkitaJapan139 km (86 mi)W of epicenterYuzawa(pop: 44,300)II: Very weakAkitaJapan139 km (87 mi)W of epicenterDaisen(pop: 91,100)II: Very weakAkitaJapan140 km (87 mi)W of epicenterOmagari(pop: 38,800)II: Very weakDaisen Shi, AkitaJapan143 km (89 mi)N of epicenterHachinohe(pop: 239,000)II: Very weakAomoriJapan143 km (89 mi)SW of epicenterShiogama(pop: 52,700)II: Very weakMiyagiJapan146 km (91 mi)SW of epicenterTomiya(pop: 52,400)II: Very weakMiyagiJapan157 km (98 mi)SW of epicenterSendai(pop: 1,096,700)II: Very weakMiyagiJapan454 km (282 mi)SW of epicenterTokyo(pop: 8,336,600)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!Compare 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 GMT2025-08-30EpicenterAgency4.650 km31 mi09:26:00Near 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 4 km2 (2 square miles) as a first-order estimate. The length of the rupture zone thus was probably around 3 km (2 mi).[More info]Recorded aftershocks, latest first (0 quake)Aug 30, 2025 06:26 pm (GMT +9)7 minutes ago4.650 km0 km - This quakeNear East Coast of Honshu, JapanMain Shock (this quake)MoreMap of aftershocksEarthquake statisticsAverage number of earthquakesBased on data from the past 25 years and our earthquake archive back to 1900, there are about 2,400 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 7 or higher: 0.04 quakes per year (or 1 quake every 25 years)Mag. 6 or higher: 0.53 quakes per year (or 1 quake every 1.9 years)Mag. 5 or higher: 8.3 quakes per yearMag. 4 or higher: 51 quakes per year (or 4.2 quakes per month)Mag. 3 or higher: 157 quakes per year (or 13.1 quakes per month)Mag. 2 or higher: 441 quakes per year (or 36.7 quakes per month)Mag. 1 or higher: 1,500 quakes per year (or 4.2 quakes per day)The area where this quake occurred has a very high level of seismic activity. It has had at least 5 quakes above magnitude 7 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 23 to 27 years.Number of quakes per yearPrevious quakes in the same area of this earthquake