Moderate magnitude 4.4 earthquake at 90 km depth28 Aug 19:57 UTC: First to report: VolcanoDiscovery after 3 minutes.28 Aug 20:00: Now using data updates from EMSCI didn't feel itI felt this quakeEarthquake detailsDate & timeAug 28, 2025 19:54:30 UTC - Local time at epicenterFriday, Aug 29, 2025, at 04:54 am (GMT +9)Statuspreliminary (automatic detection)Magnitude4.4Depth90 kmEpicenter latitude / longitude36.7°N / 141°EKitaibaraki Shi, Ibaraki, JapanSeismic antipode36.7°S / 39°WShaking intensityIII Weak shaking near epicenterFelt1 reportPrimary data sourceEMSC (European-Mediterranean Seismological Centre)Nearest volcanoNasu (103 km / 64 mi)Weather at epicenter at time of quakeFew Clouds 25.9°C (79 F), humidity: 85%, wind: 2 m/s (4 kts) from EEstimated seismic energy released2.5 x 1011 joules (69.8 megawatt hours, equivalent to 60 tons of TNT) | equivalent to ONE quake of magnitude 4.4 | about seismic energy6 minutes ago reported feltAug 28, 2025 19:54 GMT / Aug 29, 2025 04:54 am (GMT +9)Lat / Lng: 36.7 / 141: Near East Coast of Honshu, JapanSource: EMSCDetail info | Read user reports | You felt it? - Report it!';storedMarkers.push(['quake-22110880',36.70000,141.00000,'6 minutes ago: Mag. 4.4, 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 40 km (25 mi) distance north 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, 162 km (101 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(*)RegionCountry24 km (15 mi)NW of epicenterKitaibaraki(pop: 41,800)III: WeakIbarakiJapan25 km (16 mi)W of epicenterTakahagi(pop: 27,700)III: WeakIbarakiJapan33 km (21 mi)W of epicenterHitachi(pop: 174,500)III: WeakIbarakiJapan40 km (25 mi)N of epicenterIwaki(pop: 357,300)III: WeakFukushimaJapan45 km (28 mi)W of epicenterHitachi-ota(pop: 48,600)II: Very weakHitachi-ota Shi, IbarakiJapan47 km (29 mi)SW of epicenterFunaishikawa(pop: 35,300)II: Very weakNaka-gun, IbarakiJapan52 km (33 mi)SW of epicenterInada(pop: 53,500)II: Very weakNaka-shi, IbarakiJapan53 km (33 mi)SW of epicenterHitachi-Naka(pop: 156,600)II: Very weakHitachinaka Shi, IbarakiJapan54 km (33 mi)W of epicenterHigashidate(pop: 5,390)II: Very weakHigashishirakawa-gun, FukushimaJapan55 km (34 mi)SW of epicenterKatsuta(pop: 156,000)II: Very weakHitachinaka Shi, IbarakiJapan55 km (34 mi)W of epicenterOmiya(pop: 27,600)II: Very weakHitachi-omiya Shi, IbarakiJapan55 km (34 mi)W of epicenterHitachiomiya(pop: 39,300)II: Very weakHitachi-omiya Shi, IbarakiJapan56 km (35 mi)N of epicenterOyauchi(pop: 5,410)II: Very weakFutaba-gun, FukushimaJapan57 km (35 mi)SW of epicenterOarai(pop: 15,800)II: Very weakHigashiibaraki-gun, IbarakiJapan58 km (36 mi)W of epicenterDaigo(pop: 15,700)II: Very weakKuji-gun, IbarakiJapan60 km (37 mi)NW of epicenterTakanuki(pop: 4,830)II: Very weakIshikawa-gun, FukushimaJapan60 km (37 mi)SW of epicenterIshitsuka(pop: 18,100)II: Very weakHigashiibaraki-gun, IbarakiJapan63 km (39 mi)SW of epicenterMito(pop: 270,700)II: Very weakIbarakiJapan66 km (41 mi)NW of epicenterKitakata(pop: 5,830)II: Very weakIshikawa-gun, FukushimaJapan66 km (41 mi)NW of epicenterTanagura(pop: 13,800)II: Very weakHigashishirakawa-gun, FukushimaJapan70 km (43 mi)SW of epicenterOkunoya(pop: 34,600)II: Very weakHigashiibaraki-gun, IbarakiJapan70 km (43 mi)NW of epicenterIshikawa(pop: 18,800)II: Very weakFukushimaJapan73 km (45 mi)NW of epicenterOno-niimachi(pop: 9,470)II: Very weakTamura-gun, FukushimaJapan74 km (46 mi)SW of epicenterTomobe(pop: 37,100)II: Very weakKasama Shi, IbarakiJapan74 km (46 mi)SW of epicenterKasama(pop: 73,700)II: Very weakIbarakiJapan74 km (46 mi)SW of epicenterOmitama(pop: 48,900)II: Very weakIbarakiJapan75 km (47 mi)SW of epicenterHokota(pop: 46,000)II: Very weakIbarakiJapan76 km (47 mi)W of epicenterMotegi(pop: 11,800)II: Very weakHaga-gun, TochigiJapan76 km (47 mi)W of epicenterKarasuyama(pop: 18,500)II: Very weakTochigiJapan81 km (50 mi)NW of epicenterShirakawa(pop: 59,500)II: Very weakFukushimaJapan82 km (51 mi)NW of epicenterYabuki(pop: 17,300)II: Very weakNishishirakawa-gun, FukushimaJapan85 km (53 mi)NW of epicenterSukagawa(pop: 75,000)II: Very weakFukushimaJapan87 km (54 mi)SW of epicenterIshioka(pop: 73,100)II: Very weakIbarakiJapan89 km (56 mi)SW of epicenterNamegata(pop: 32,200)II: Very weakIbarakiJapan90 km (56 mi)NW of epicenterKumakura(pop: 20,800)II: Very weakNishishirakawa-gun, FukushimaJapan91 km (56 mi)SW of epicenterKasumigaura(pop: 40,100)II: Very weakIbarakiJapan95 km (59 mi)NW of epicenterKoriyama(pop: 327,700)II: Very weakKoriyama Shi, FukushimaJapan98 km (61 mi)SW of epicenterTsuchiura(pop: 144,400)II: Very weakIbarakiJapan105 km (65 mi)SW of epicenterTsukuba(pop: 241,700)II: Very weakIbarakiJapan162 km (101 mi)SW of epicenterTokyo(pop: 8,336,600)II: Very weakTokyoJapanNotes:(*) Shaking intensity according to the Modified Mercalli Intensity Scale (MMI) and estimated using seismic models.User-reports for this quake (1)The first report about ground shaking reached us after only 3 minutes, before other agencies reported it. So far, we have received 1 report for this quake from Japan.It came from near Tokyo, the capital of Japan with 8,300,000 inhabitants in 162 km (101 mi) distance southwest of the epicenter.This section is being updated as new data comes in.User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.Contribute:Leave a comment if you find a particular report interesting or want to add to it.Flag as inappropriate.Mark as helpful or interesting.Send your own user report!Translate157.1 km SW of epicenter [Map] / Very weak shaking (MMI II) : i was laying in bed and the bed started shaking as if it’s a massage chair i freaked out List of cities/places with most reportsPlaceDistance from epicenterAverage reported Shaking IntensityNr. of reportsTokyo, Tokyo, Japan(Pop.: 8,336,599)162 km (101 mi)SW of epicenterII: Very weak shaking1Note: Only reports with latitude/longitude coordinate positions given (1 in total) could be used for statistics.What is Intensity and the Mercalli Intensity Scale?The amount of shaking that occurs on the surface due to an earthquake is called the intensity. It is commonly measured on the so-called Modified Mercalli Intensity Scale (MMI) ranging from 1 (not felt) to 10 (extreme shaking), and given in Roman numerals as I,II,...IX, X, and often displayed with color codes ranging from light blue to dark red.Earthquake intensity depends mainly on the magnitude and depth of the quake as well as the distance from the epicenter: The further away, the less shaking intensity occurs.Read more about the MMI scale!Number of reports by intensityShaking intensityNumber of reportsMin-Max distance from epicenter (*)Average distance (*)II: Very weak shaking1157–157 km (98–98 mi)157 km (98 mi)Notes(*) Reports are filtered to exclude those that are likely highly inaccurate or esaggerated.Only reports with latitude/longitude coordinate positions given (1 in total) could be used for geographic statistics.I didn't feel itI felt this quakeIf you were near the epicenter and felt it, please share your experience and submit a short "I felt it" report! Other users would love to hear about it!If you did NOT feel the quake although you were in the area, please report it as well! Your contribution is valuable to earthquake science and seismic hazard analysis.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 GMT2025-08-28EpicenterAgency4.490 km56 mi19:54:30NEAR 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 3 km2 (1 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 29, 2025 04:54 am (GMT +9)6 minutes ago4.490 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 3,800 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 11.4 years)Mag. 6 or higher: 0.65 quakes per year (or 1 quake every 1.5 years)Mag. 5 or higher: 14.5 quakes per yearMag. 4 or higher: 65 quakes per year (or 5.4 quakes per month)Mag. 3 or higher: 198 quakes per year (or 16.5 quakes per month)Mag. 2 or higher: 662 quakes per year (or 55 quakes per month)Mag. 1 or higher: 2,500 quakes per year (or 6.9 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