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The quake had a moderate depth of 141 km (88 mi) and was not felt (or at least not reported so).Quake Data | Interactive map | User reports | Aftershocks | Earlier quakes here | Quakes in Japan | Tokyo | Chiba | ShizuokaHint: Click on the image to see different maps of this quake!Moderate magnitude 4.2 earthquake at 141 km depth17 Apr 13:58 UTC: First to report: NIED after 7 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeApr 17, 2026 13:51:17 UTC - Local time at epicenterFriday, Apr 17, 2026, at 10:51 pm (GMT +9)Statusconfirmed (manually revised)Magnitude4.2Depth141 kmEpicenter latitude / longitude32.902°N / 140.121°ETokyo, JapanSeismic antipode32.902°S / 39.879°WShaking intensityII Very weak shakingFelt0 reportsPrimary data sourceNIED (National Research Institute for Earth Science and Disaster Resilience)Nearest volcanoHachijo-jima (41 km / 25 mi)Estimated seismic energy released1.3 x 1011 joules (35 megawatt hours, equivalent to 30.1 tons of TNT) | equivalent to ONE quake of magnitude 4.2 | about seismic energy7 minutes agoApr 17, 2026 13:51 GMT / Apr 17, 2026 10:51 pm (GMT +9)Lat / Lng: 32.902 / 140.121: Japan: E Off Hachijojima IslandSource: NIEDDetail info | You felt it? - Report it!';storedMarkers.push(['quake-22918409',32.90200,140.12100,'7 minutes ago: Mag. 4.2, Japan: E Off Hachijojima Island',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 Hachijo, a town with 7,200 inhabitants in Japan, in 39 km (24 mi) distance northwest of the epicenter. People likely experienced very weak shaking there. In the capital of Japan, Tokyo, 313 km (194 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(*)RegionCountry39 km (24 mi)NW of epicenterHachijo(pop: 7,210)II: Very weakHachijo Shicho, TokyoJapan233 km (145 mi)N of epicenterTateyama(pop: 50,100)I: Not feltChibaJapan249 km (155 mi)NW of epicenterIto(pop: 68,800)I: Not feltIto Shi, ShizuokaJapan268 km (167 mi)N of epicenterYokosuka(pop: 409,500)I: Not feltKanagawaJapan270 km (168 mi)NW of epicenterMishima(pop: 107,900)I: Not feltShizuokaJapan270 km (168 mi)NW of epicenterNumazu(pop: 189,500)I: Not feltShizuokaJapan273 km (170 mi)N of epicenterKamakura(pop: 172,900)I: Not feltKanagawaJapan273 km (170 mi)N of epicenterKimitsu(pop: 83,100)I: Not feltChibaJapan275 km (171 mi)NW of epicenterYaizu(pop: 139,600)I: Not feltShizuokaJapan276 km (172 mi)N of epicenterOdawara(pop: 188,900)I: Not feltKanagawaJapan276 km (172 mi)N of epicenterKisarazu(pop: 136,200)I: Not feltChibaJapan278 km (172 mi)NW of epicenterFujieda(pop: 145,000)I: Not feltShizuokaJapan278 km (173 mi)NW of epicenterShimada(pop: 95,700)I: Not feltShizuokaJapan279 km (173 mi)N of epicenterFujisawa(pop: 439,700)I: Not feltKanagawaJapan279 km (173 mi)N of epicenterChigasaki(pop: 242,800)I: Not feltKanagawaJapan279 km (174 mi)N of epicenterHiratsuka(pop: 258,400)I: Not feltKanagawaJapan281 km (175 mi)N of epicenterMobara(pop: 88,300)I: Not feltChibaJapan282 km (175 mi)NW of epicenterShizuoka(pop: 693,400)I: Not feltShizuokaJapan284 km (176 mi)N of epicenterEbina(pop: 136,500)I: Not feltKoza-gun, KanagawaJapan284 km (177 mi)NW of epicenterKakegawa(pop: 117,900)I: Not feltShizuokaJapan285 km (177 mi)NW of epicenterFuji(pop: 245,400)I: Not feltShizuokaJapan285 km (177 mi)N of epicenterYokohama(pop: 3,777,500)I: Not feltKanagawaJapan287 km (178 mi)N of epicenterHadano(pop: 163,800)I: Not feltKanagawaJapan288 km (179 mi)N of epicenterIsehara(pop: 103,400)I: Not feltKanagawaJapan289 km (180 mi)N of epicenterAyase(pop: 83,900)I: Not feltKanagawaJapan289 km (180 mi)NW of epicenterFukuroi(pop: 88,400)I: Not feltShizuokaJapan290 km (180 mi)N of epicenterGotemba(pop: 86,600)I: Not feltGotenba Shi, ShizuokaJapan290 km (180 mi)NW of epicenterIwata(pop: 166,700)I: Not feltShizuokaJapan291 km (181 mi)N of epicenterIchihara(pop: 283,500)I: Not feltChibaJapan291 km (181 mi)N of epicenterAtsugi(pop: 224,000)I: Not feltKanagawaJapan292 km (182 mi)NW of epicenterFujinomiya(pop: 132,500)I: Not feltShizuokaJapan293 km (182 mi)N of epicenterYamato(pop: 242,100)I: Not feltKanagawaJapan294 km (182 mi)N of epicenterKawasaki(pop: 1,538,300)I: Not feltKanagawaJapan295 km (183 mi)N of epicenterMinamirinkan(pop: 224,000)I: Not feltYamato-shi, KanagawaJapan295 km (184 mi)N of epicenterZama(pop: 132,300)I: Not feltKanagawaJapan298 km (185 mi)NW of epicenterHamamatsu(pop: 791,700)I: Not feltShizuokaJapan298 km (185 mi)N of epicenterOta(pop: 748,100)I: Not feltOta-ku, TokyoJapan300 km (186 mi)N of epicenterMachida(pop: 431,100)I: Not feltTokyoJapan308 km (192 mi)N of epicenterMinato City(pop: 260,500)I: Not feltMinato-ku, TokyoJapan313 km (194 mi)N 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 GMT2026-04-17EpicenterAgency4.2141 km88 mi13:51:17E OFF HACHIJOJIMA ISLANDNIED (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 2 km2 (1 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)Apr 17, 2026 10:51 pm (GMT +9)7 minutes ago4.2141 km0 km - This quakeJapan: E Off Hachijojima IslandMain Shock (this quake)MoreMap of aftershocksPrevious quakes in the same area of this earthquake7 minutes agoApr 17, 2026 13:51 GMT / Apr 17, 2026 10:51 pm (GMT +9)Lat / Lng: 32.902 / 140.121: Japan: E Off Hachijojima IslandSource: NIEDDetail info | You felt it? - Report it!',4.2,42, '#bb202a', 0.9,1.5, '#bb202a', 0.27);map2.addToMap('thisQuake',32.902,140.121,'7 minutes ago: Mag. 4.2, Japan: E Off Hachijojima Island','Earthquake: Mag 4.2 / 141 km (88 mi) depth7 minutes agoApr 17, 2026 13:51 GMT / Apr 17, 2026 10:51 pm (GMT +9)Lat / Lng: 32.902 / 140.121: Japan: E Off Hachijojima IslandSource: NIEDDetail info | You felt it? - Report it!','default'); // this will be local to this table obj function putQuakeOnMap(id,lat,lon,time,title,html,mag,zIndex) { qTableOlder.putQuakeOnMap(id,lat,lon,time,title,html,mag,zIndex); } map2.circleScale=0.5;qTableOlder.usePalette=1;qTableOlder.startVal=qTableOlder.referenceTime-(80*365.25*86400);qTableOlder.endVal=qTableOlder.referenceTime; qTableOlder.assignMap(map2); (async function(){await new Promise(r => setTimeout(r,4000));map2.map.setZoom(7)})(); })(); (async function(){while(typeof mkRequest=="undefined")await new Promise(r=>setTimeout(r,500));mkRequest("https://server2.allquakes.com/api/getPrevious.php?quakeId=22918409","get","",function(httpObj){let r=httpObj.responseText,d=document;if(""!=r&&200==httpObj.status){let o=JSON.parse(r);if(!o){d.getElementById("olderQuakesSection").remove();return};let table=d.getElementById("qTableOlder");table.innerHTML+=o.tableRows,qTableOlder.alternateBg(),d.getElementById("placeholder_largestQText").innerHTML=o.html,d.getElementById("sectionPreviousCWrap").style.display="",eval(o.js)}})})();]]>Try our free app!Android | iOS versionSupport Us – Help Us Enhance Our Services!We’re passionate about delivering the latest volcano and earthquake data from around the globe — just for you. 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