Moderate magnitude 4.1 earthquake at 207 km depth23 Feb 05:31 UTC: First to report: NIED after 12 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeFeb 23, 2026 05:18:46 UTC - Local time at epicenterMonday, Feb 23, 2026, at 02:18 pm (GMT +9)Statusconfirmed (manually revised)Magnitude4.1Depth207 kmEpicenter latitude / longitude36.91°N / 139.561°ENikko-shi, Tochigi, JapanSeismic antipode36.91°S / 40.439°WShaking intensityNot feltPrimary data sourceNIED (National Research Institute for Earth Science and Disaster Resilience)Nearest volcanoDorobu (2 km / 1 mi)Estimated seismic energy released8.9 x 1010 joules (24.8 megawatt hours, equivalent to 21.3 tons of TNT) | equivalent to ONE quake of magnitude 4.1 | about seismic energy13 minutes agoFeb 23, 2026 05:18 GMT / Feb 23, 2026 02:18 pm (GMT +9)Lat / Lng: 36.91 / 139.561: Japan: Northern Tochigi PrefSource: NIEDDetail info | You felt it? - Report it!';storedMarkers.push(['quake-22745421',36.91000,139.56100,'13 minutes ago: Mag. 4.1, Japan: Northern Tochigi Pref',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 near the epicenter is Nikko, a town with 78,000 inhabitants in Japan, in 18.5 km (11 mi) distance to the south, but it is unlikely that the quake was felt there. DistancePlaceMax. shaking intensity(*)RegionCountry18 km (11 mi)S of epicenterNikko(pop: 77,700)I: Not feltTochigiJapan24 km (15 mi)SE of epicenterImaichi(pop: 64,300)I: Not feltNikko-shi, TochigiJapan35 km (22 mi)E of epicenterYaita(pop: 36,300)I: Not feltTochigiJapan42 km (26 mi)E of epicenterOtawara(pop: 72,100)I: Not feltOtawara Shi, TochigiJapan43 km (27 mi)S of epicenterKanuma(pop: 94,900)I: Not feltTochigiJapan43 km (27 mi)SE of epicenterSakura(pop: 44,700)I: Not feltTochigiJapan44 km (27 mi)E of epicenterKuroiso(pop: 61,200)I: Not feltNasu-shiobara Shi, TochigiJapan44 km (27 mi)SE of epicenterUjiie(pop: 30,400)I: Not feltSakura Shi, TochigiJapan46 km (28 mi)E of epicenterNasushiobara(pop: 115,800)I: Not feltNasu-gun, TochigiJapan48 km (30 mi)SE of epicenterUtsunomiya(pop: 518,800)I: Not feltTochigiJapan49 km (30 mi)SE of epicenterHoshakuji(pop: 29,200)I: Not feltShioya-gun, TochigiJapan54 km (34 mi)E of epicenterOgawa(pop: 15,200)I: Not feltNasu-gun, TochigiJapan55 km (34 mi)SW of epicenterNumata(pop: 46,900)I: Not feltGunmaJapan57 km (36 mi)SW of epicenterMidori(pop: 50,300)I: Not feltGunmaJapan59 km (37 mi)S of epicenterMibu(pop: 39,500)I: Not feltShimotsuga-gun, TochigiJapan60 km (37 mi)SE of epicenterKarasuyama(pop: 18,500)I: Not feltTochigiJapan60 km (37 mi)S of epicenterKiryu(pop: 109,000)I: Not feltKiryu Shi, GunmaJapan60 km (38 mi)S of epicenterTanuma(pop: 28,700)I: Not feltSano Shi, TochigiJapan61 km (38 mi)S of epicenterTochigi(pop: 159,100)I: Not feltTochigiJapan61 km (38 mi)SE of epicenterNasukarasuyama(pop: 24,900)I: Not feltNasu-karasuyama Shi, TochigiJapan62 km (38 mi)SE of epicenterShimotsuke(pop: 60,300)I: Not feltKawachi-gun, TochigiJapan62 km (38 mi)SE of epicenterKaminokawa(pop: 31,200)I: Not feltKawachi-gun, TochigiJapan64 km (40 mi)W of epicenterMinamiuonuma(pop: 55,400)I: Not feltNiigataJapan65 km (40 mi)NW of epicenterUonuma(pop: 34,500)I: Not feltNiigataJapan65 km (40 mi)S of epicenterAshikaga(pop: 144,700)I: Not feltTochigiJapan66 km (41 mi)S of epicenterSano(pop: 117,700)I: Not feltTochigiJapan66 km (41 mi)E of epicenterShirakawa(pop: 59,500)I: Not feltFukushimaJapan67 km (42 mi)SE of epicenterMooka(pop: 78,700)I: Not feltTochigiJapan69 km (43 mi)SE of epicenterMashiko(pop: 26,000)I: Not feltHaga-gun, TochigiJapan69 km (43 mi)SW of epicenterShibukawa(pop: 76,100)I: Not feltGunmaJapan70 km (44 mi)S of epicenterOta(pop: 224,400)I: Not feltOta-shi, GunmaJapan71 km (44 mi)S of epicenterOyama(pop: 167,600)I: Not feltTochigiJapan73 km (45 mi)NE of epicenterAizu-Wakamatsu(pop: 118,200)I: Not feltFukushimaJapan73 km (46 mi)SW of epicenterIsesaki(pop: 211,900)I: Not feltGunmaJapan73 km (46 mi)S of epicenterTatebayashi(pop: 81,300)I: Not feltGunmaJapan74 km (46 mi)SE of epicenterYuki(pop: 50,600)I: Not feltYuki Shi, IbarakiJapan75 km (46 mi)W of epicenterTokamachi(pop: 53,300)I: Not feltTokamachi-shi, NiigataJapan76 km (47 mi)SE of epicenterChikusei(pop: 100,800)I: Not feltIbarakiJapan78 km (48 mi)SE of epicenterShimodate(pop: 63,700)I: Not feltChikusei Shi, IbarakiJapan136 km (85 mi)S 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 GMT2026-02-23EpicenterAgency4.1207 km129 mi05:18:46NORTHERN TOCHIGI 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 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)Feb 23, 2026 02:18 pm (GMT +9)13 minutes ago4.1207 km0 km - This quakeTochigi, 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 3,400 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 6 or higher: 0.15 quakes per year (or 1 quake every 6.7 years)Mag. 5 or higher: 2.9 quakes per yearMag. 4 or higher: 17.9 quakes per yearMag. 3 or higher: 76 quakes per year (or 6.3 quakes per month)Mag. 2 or higher: 272 quakes per year (or 22.6 quakes per month)Mag. 1 or higher: 990 quakes per year (or 82 quakes per month)The area where this quake occurred has a very high level of seismic activity. It has had at least 4 quakes above magnitude 6 since 2000, 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