Strong magnitude 5.2 earthquake at 42 km depth29 Aug 16:55 UTC: First to report: VolcanoDiscovery after 5 minutes.29 Aug 16:57: Now using data updates from NIEDI didn't feel itI felt this quakeEarthquake detailsDate & timeAug 29, 2025 16:51:00 UTC - Local time at epicenterSaturday, Aug 30, 2025, at 01:51 am (GMT +9)Statusunconfirmed (uncertain whether an earthquake with these data happened)Magnitude5.2Depth42 kmEpicenter latitude / longitude37.297°N / 141.608°EFukushima, JapanSeismic antipode37.297°S / 38.392°WShaking intensityIV Light shaking near epicenterFelt1 reportPrimary data sourceNIED (National Research Institute for Earth Science and Disaster Resilience)Nearest volcanoAdatara (123 km / 76 mi)Weather at epicenter at time of quakeOvercast Clouds 28.8°C (84 F), humidity: 84%, wind: 0 m/s (1 kts) from NNEEstimated seismic energy released4 x 1012 joules (1.11 gigawatt hours, equivalent to 951 tons of TNT) | equivalent to ONE quake of magnitude 5.2 | about seismic energy6 minutes ago reported feltAug 29, 2025 16:51 GMT / Aug 30, 2025 01:51 am (GMT +9)Lat / Lng: 37.297 / 141.608: Japan: E Off Fukushima PrefSource: NIEDDetail info | Read user reports | You felt it? - Report it!';storedMarkers.push(['quake-22113730',37.29700,141.60800,'6 minutes ago: Mag. 5.2, Japan: E Off Fukushima Pref',html,'quakes-7-24.png',30,30,15,15,126]); 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 70 km (43 mi) distance southwest of the epicenter. People likely experienced light 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, 248 km (154 mi) away from the epicenter, the earthquake was probably felt as weak shaking.The following table shows some of the places that might have been affected (or not) by the shaking.DistancePlaceMax. shaking intensity(*)RegionCountry67 km (41 mi)NW of epicenterMinami-Soma(pop: 59,000)IV: LightMinamisoma Shi, FukushimaJapan70 km (43 mi)SW of epicenterIwaki(pop: 357,300)IV: LightFukushimaJapan81 km (51 mi)NW of epicenterSoma(pop: 34,900)IV: LightSoma Shi, FukushimaJapan90 km (56 mi)W of epicenterTamura(pop: 35,200)III: WeakFukushimaJapan95 km (59 mi)SW of epicenterKitaibaraki(pop: 41,800)III: WeakIbarakiJapan105 km (65 mi)NW of epicenterKakuda(pop: 33,200)III: WeakMiyagiJapan106 km (66 mi)NW of epicenterWatari(pop: 33,500)III: WeakMiyagiJapan108 km (67 mi)W of epicenterSukagawa(pop: 75,000)III: WeakFukushimaJapan109 km (67 mi)W of epicenterNihommatsu(pop: 53,600)III: WeakNihonmatsu Shi, FukushimaJapan109 km (68 mi)W of epicenterKoriyama(pop: 327,700)III: WeakKoriyama Shi, FukushimaJapan109 km (68 mi)W of epicenterMotomiya(pop: 30,200)III: WeakFukushimaJapan111 km (69 mi)NW of epicenterIwanuma(pop: 43,900)III: WeakMiyagiJapan113 km (70 mi)NW of epicenterFukushima(pop: 294,200)III: WeakFukushimaJapan113 km (70 mi)NW of epicenterFukushima(pop: 294,200)III: WeakFukushimaJapan114 km (71 mi)NW of epicenterDate(pop: 59,600)III: WeakFukushimaJapan115 km (72 mi)SW of epicenterHitachi(pop: 174,500)III: WeakIbarakiJapan121 km (75 mi)W of epicenterShirakawa(pop: 59,500)III: WeakFukushimaJapan124 km (77 mi)NW of epicenterShiogama(pop: 52,700)III: WeakMiyagiJapan126 km (78 mi)NW of epicenterSendai(pop: 1,096,700)III: WeakMiyagiJapan127 km (79 mi)SW of epicenterHitachi-ota(pop: 48,600)III: WeakHitachi-ota Shi, IbarakiJapan127 km (79 mi)N of epicenterIshinomaki(pop: 138,500)III: WeakMiyagiJapan137 km (85 mi)SW of epicenterInada(pop: 53,500)III: WeakNaka-shi, IbarakiJapan137 km (85 mi)NW of epicenterTomiya(pop: 52,400)III: WeakMiyagiJapan138 km (86 mi)SW of epicenterHitachi-Naka(pop: 156,600)III: WeakHitachinaka Shi, IbarakiJapan140 km (87 mi)SW of epicenterKatsuta(pop: 156,000)III: WeakHitachinaka Shi, IbarakiJapan141 km (88 mi)W of epicenterNasushiobara(pop: 115,800)III: WeakNasu-gun, TochigiJapan143 km (89 mi)W of epicenterKuroiso(pop: 61,200)III: WeakNasu-shiobara Shi, TochigiJapan147 km (92 mi)SW of epicenterMito(pop: 270,700)III: WeakIbarakiJapan148 km (92 mi)NW of epicenterYonezawa(pop: 94,500)III: WeakYamagataJapan149 km (92 mi)W of epicenterAizu-Wakamatsu(pop: 118,200)III: WeakFukushimaJapan151 km (94 mi)NW of epicenterYamagata(pop: 248,800)III: WeakYamagataJapan153 km (95 mi)N of epicenterFurukawa(pop: 76,300)III: WeakOsaki Shi, MiyagiJapan154 km (96 mi)N of epicenterOsaki(pop: 128,800)III: WeakOsaki Shi, MiyagiJapan157 km (97 mi)SW of epicenterKasama(pop: 73,700)III: WeakIbarakiJapan159 km (99 mi)W of epicenterKitakata(pop: 46,300)III: WeakFukushimaJapan162 km (101 mi)N of epicenterTome(pop: 77,900)III: WeakMiyagiJapan174 km (108 mi)SW of epicenterUtsunomiya(pop: 449,900)III: WeakTochigiJapan177 km (110 mi)SW of epicenterKamisu(pop: 95,500)III: WeakIbarakiJapan248 km (154 mi)SW of epicenterTokyo(pop: 8,336,600)III: WeakTokyoJapan272 km (169 mi)SW of epicenterYokohama(pop: 3,761,600)II: Very weakKanagawaJapanNotes:(*) 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 5 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 248 km (154 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!Translate240.5 km SW of epicenter [Map] / Very weak shaking (MMI II) / single lateral shake / 1-2 s : Shook for a few seconds List of cities/places with most reportsPlaceDistance from epicenterAverage reported Shaking IntensityNr. of reportsTokyo, Tokyo, Japan(Pop.: 8,336,599)248 km (154 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 shaking1240–240 km (149–149 mi)240 km (149 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 GMT2025-08-29EpicenterAgency5.242 km26 mi16:51:00E OFF FUKUSHIMA PREFNIED (National Research Institute for Earth Science and Disaster Resilience)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 16 km2 (6 square miles) as a first-order estimate. The length of the rupture zone thus was probably around 7 km (4 mi).[More info]Recorded aftershocks, latest first (0 quake)Aug 30, 2025 01:51 am (GMT +9)6 minutes ago5.242 km0 km - This quakeFukushima, 248 km NE of Tokyo, Tokyo, 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 7,400 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 7 or higher: 0.1 quakes per year (or 1 quake every 10.4 years)Mag. 6 or higher: 1.39 quakes per yearMag. 5 or higher: 15.9 quakes per yearMag. 4 or higher: 96 quakes per year (or 8 quakes per month)Mag. 3 or higher: 417 quakes per year (or 34.7 quakes per month)Mag. 2 or higher: 1,500 quakes per year (or 4.1 quakes per day)Mag. 1 or higher: 6,100 quakes per year (or 16.6 quakes per day)The area where this quake occurred has a very high level of seismic activity. It has had at least 12 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