")}e.setAttribute("data-distAdded",1)}}async filterEQ(e){if(document,this.magFilter=e,this.currMag){var s=Math.max(e,this.currMag.getAttribute("data-baseVal"));if(this.currMag.innerText=s.toString(),this.magFilterBtns){let a=this.magFilterBtns.getElementsByClassName("magFilter");for(i=0;isetTimeout(e,1e3))),e!=this.distFilter){if(this.distFilter=e,this.currDistInfoKm&&(this.currDistInfoKm.innerText=e),this.currDistInfoMi&&(this.currDistInfoMi.innerText=Math.round(.62137*e)),e>this.currentMaxDist)return this.loadNewQuakes(500);this.applyFilters()}}async filterByAge(e){if(this.ageFilter=e,this.ageFilterBtns){let s=this.ageFilterBtns.getElementsByClassName("ageFilter");for(var a=0;a0&&(e.getAttribute("data-mag")&&parseFloat(e.getAttribute("data-mag"))3&&e.getAttribute("data-mag")&&parseInt(e.getAttribute("data-ea"))>0))return!1;if(this.ageFilter>0){if(this.referenceTime){if(e.getAttribute("data-time")&&this.referenceTime-parseInt(e.getAttribute("data-time"))>this.ageFilter)return!1}else if(e.getAttribute("data-time")&&s-parseInt(e.getAttribute("data-time"))>this.ageFilter)return!1}if(this.statusFilter&&e.getAttribute("data-ea")&&parseInt(e.getAttribute("data-ea"))>0)return!1;if(this.distFilter>0){if(e.getAttribute("data-dist")&&parseFloat(e.getAttribute("data-dist"))>this.distFilter)return!1;if(500==this.distFilter&&e.getAttribute("data-dist")&&e.getAttribute("data-mag")){let a=parseFloat(e.getAttribute("data-mag")),l=parseFloat(e.getAttribute("data-dist"));if(a25||a50||a100||a200||a250||a300||l>500)return!1}}return!("time"!=this.sortBy&&e.classList.contains("tSpc"))}async applyFilters(e){var e=e||0;e||!this.loadMoreUrl||this.hasLoadedAll||(this.loadMoreRows(),await new Promise(e=>setTimeout(e,500)));let s=document,a=this.table.rows,l=0,r=Math.floor(Date.now()/1e3);for(let n=1;nsetTimeout(e,20)))}}let h=a.getElementsByClassName("aStr");nowUTC=Math.floor(Date.now()/1e3);for(let u=0;usetTimeout(e,1e3))),await new Promise(e=>setTimeout(e,200));let s=this.table,a=Array.from(s.querySelectorAll(":scope > tbody > tr"));a.shift();let l="desc",r=e==this.sortBy;for(let n of(r&&"desc"==this.sortDir&&(l="asc"),this.sortBy=e,this.sortDir=l,a.sort((s,a)=>{if("time"==e){let r=parseInt(s.getAttribute("data-time")),n=parseInt(a.getAttribute("data-time"));return"asc"==l?r-n:n-r}if("dep"==e){let o=parseInt(s.getAttribute("data-dep")),d=parseInt(a.getAttribute("data-dep"));return"asc"==l?o-d:d-o}let h=parseFloat(s.getAttribute("data-mag"));isNaN(h)&&(h=0);let u=parseFloat(a.getAttribute("data-mag"));return isNaN(u)&&(u=0),"asc"==l?h-u:u-h}),a))("tSpc"==n.className||1==n.getAttribute("data-ea"))&&("time"==e?n.style.display="":n.style.display="none"),s.tBodies[0].appendChild(n);this.table.rows[0].style.opacity=1,this.isSorting=0,this.applyFilters()}async changeCircleSize(e){let s=this.map;s.circleScale*=e;for(let a=0;atimeAtCurRow?posFound=1:(elToInsertAfter=rows[curRowInd],curRowInd++)}else posFound=1;markThem&&(newTableRow.classList.add("newQuake"),setTimeout(function(){removeMarking(newTableRow)},8e3)),elToInsertAfter.parentNode.insertBefore(newTableRow,elToInsertAfter.nextSibling),elToInsertAfter=rows[curRowInd],curRowInd++,newRows++,"undefined"!=typeof addQuakeToMap?eval(quake.js):setTimeout(function(){eval(quake.js)},100)}return newRows+updated>0&&(this.alternateBg(),"time"==this.sortBy&&"asc"==this.sortDir&&this.sortTable("time")),[newRows,updated]}assignMap(e){this.map=e}}]]>Updated: Aug 21, 2026 12:06 GMT - I felt this quakeA strong magnitude 5.5 earthquake hit 242 km (150 mi) away from Tokyo, Tokyo, Japan, in the evening of Friday, Aug 21, 2026 at 9.02 pm local time (GMT +9). The quake had a shallow depth of 49 km (30 mi) and was reported felt by some people near the epicenter.Quake Data | Interactive map | Seismograms | User reports | Aftershocks | Earlier quakes here | Quakes in Japan | Chiba | Kanagawa | ShizuokaHint: Click on the image to see different maps of this quake!Strong magnitude 5.5 earthquake at 49 km depth21 Aug 12:05 UTC: First to report: VolcanoDiscovery after 3 minutes.21 Aug 12:06: Now using data updates from EMSCI didn't feel itI felt this quakeEarthquake detailsDate & timeAug 21, 2026 12:02:06 UTC - Local time at epicenterFriday, Aug 21, 2026, at 09:02 pm (GMT +9)Statusunconfirmed (uncertain whether an earthquake with these data happened)Magnitude5.50Depth49 kmEpicenter latitude / longitude33.6817°N / 140.7064°ETokyo, JapanSeismic antipode33.6817°S / 39.294°WShaking intensityIV Light shaking near epicenterFelt2 reportsPrimary data sourceEMSC (European-Mediterranean Seismological Centre)Nearest volcanoKurose Hole (100 km / 62 mi)Weather at epicenter at time of quakeHeavy Intensity Rain 26.8°C (80 F), humidity: 88%, wind: 5 m/s (9 kts) from SEstimated seismic energy released1.1 x 1013 joules (3.12 gigawatt hours, equivalent to 2682 tons of TNT or 0.2 atomic bombs!) | equivalent to ONE quake of magnitude 5.5 | about seismic energy5 minutes ago reported feltAug 21, 2026 12:02 GMT / Aug 21, 2026 09:02 pm (GMT +9)Lat / Lng: 33.6817 / 140.7064: Izu Islands, Japan RegionSource: EMSCDetail info | Read user reports | You felt it? - Report it!';storedMarkers.push(['quake-23301023',33.68170,140.70640,'5 minutes ago: Mag. 5.5, Izu Islands, Japan Region',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 Tateyama, a town with 50,000 inhabitants in Japan, in 164 km (102 mi) distance northwest of the epicenter. People likely experienced weak shaking there. In the capital of Japan, Tokyo, 242 km (150 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(*)RegionCountry164 km (102 mi)NW of epicenterTateyama(pop: 50,100)III: WeakChibaJapan198 km (123 mi)N of epicenterMobara(pop: 88,300)III: WeakChibaJapan201 km (125 mi)N of epicenterKimitsu(pop: 83,100)III: WeakChibaJapan202 km (126 mi)N of epicenterKisarazu(pop: 136,200)III: WeakChibaJapan202 km (126 mi)NW of epicenterYokosuka(pop: 409,500)III: WeakKanagawaJapan207 km (128 mi)NW of epicenterIto(pop: 68,800)III: WeakIto Shi, ShizuokaJapan210 km (131 mi)NW of epicenterKamakura(pop: 172,900)III: WeakKanagawaJapan212 km (132 mi)N of epicenterIchihara(pop: 283,500)III: WeakChibaJapan217 km (135 mi)NW of epicenterFujisawa(pop: 439,700)III: WeakKanagawaJapan217 km (135 mi)NW of epicenterYokohama(pop: 3,777,500)III: WeakKanagawaJapan219 km (136 mi)NW of epicenterChigasaki(pop: 242,800)III: WeakKanagawaJapan220 km (137 mi)N of epicenterChiba(pop: 979,800)III: WeakChibaJapan222 km (138 mi)NW of epicenterHiratsuka(pop: 258,400)III: WeakKanagawaJapan224 km (139 mi)NW of epicenterKawasaki(pop: 1,538,300)III: WeakKanagawaJapan224 km (139 mi)NW of epicenterEbina(pop: 136,500)III: WeakKoza-gun, KanagawaJapan224 km (139 mi)N of epicenterYotsukaido(pop: 95,300)III: WeakYotsukaido Shi, ChibaJapan225 km (140 mi)NW of epicenterOdawara(pop: 188,900)III: WeakKanagawaJapan228 km (142 mi)NW of epicenterOta(pop: 748,100)III: WeakOta-ku, TokyoJapan229 km (142 mi)NW of epicenterMishima(pop: 107,900)III: WeakShizuokaJapan230 km (143 mi)NW of epicenterIsehara(pop: 103,400)III: WeakKanagawaJapan230 km (143 mi)NW of epicenterYamato(pop: 242,100)III: WeakKanagawaJapan230 km (143 mi)N of epicenterSakura(pop: 173,700)III: WeakChibaJapan231 km (143 mi)N of epicenterNarashino(pop: 176,200)III: WeakChibaJapan231 km (144 mi)NW of epicenterAtsugi(pop: 224,000)III: WeakKanagawaJapan231 km (144 mi)NW of epicenterNumazu(pop: 189,500)III: WeakShizuokaJapan232 km (144 mi)NW of epicenterHadano(pop: 163,800)III: WeakKanagawaJapan232 km (144 mi)N of epicenterUrayasu(pop: 171,400)III: WeakChibaJapan233 km (144 mi)NW of epicenterMinamirinkan(pop: 224,000)III: WeakYamato-shi, KanagawaJapan234 km (146 mi)NW of epicenterZama(pop: 132,300)III: WeakKanagawaJapan235 km (146 mi)N of epicenterYachiyo(pop: 199,500)III: WeakChibaJapan236 km (147 mi)N of epicenterNarita(pop: 132,900)III: WeakChibaJapan236 km (147 mi)NW of epicenterMachida(pop: 431,100)III: WeakTokyoJapan237 km (147 mi)N of epicenterMinato City(pop: 260,500)III: WeakMinato-ku, TokyoJapan237 km (147 mi)N of epicenterChuo(pop: 169,200)III: WeakTokyoJapan241 km (150 mi)N of epicenterKatsushika(pop: 453,100)III: WeakTokyoJapan242 km (150 mi)N of epicenterTokyo(pop: 9,733,300)III: WeakTokyoJapan258 km (160 mi)NW of epicenterShizuoka(pop: 693,400)III: WeakShizuokaJapan266 km (165 mi)N of epicenterSaitama(pop: 1,324,900)III: WeakSaitamaJapan295 km (183 mi)NW of epicenterKofu(pop: 189,600)III: WeakKofu-shi, YamanashiJapan298 km (185 mi)N of epicenterMito(pop: 270,700)III: WeakIbarakiJapanNotes:(*) Shaking intensity according to the Modified Mercalli Intensity Scale (MMI) and estimated using seismic models.User-reports for this quake (2)The first report about ground shaking reached us after only 3 minutes, before other agencies reported it. So far, we have received 2 reports for this quake from Japan. The quake was reported to have been felt in up to approx. 250 km (155 mi) distance.Most reports came from Tokyo, the capital of Japan with 9,700,000 inhabitants in 242 km (150 mi) distance north of the epicenter. Further below is a list of places where most people reported this quake.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!Translate239.4 km NNW of epicenter [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 5-10 s : Just shaking shinjuku (241.5 km NNW of epicenter) [Map] / Weak shaking (MMI III) / 5-10 s : I felt scared since I never felt this kind of thing before. List of cities/places with most reportsPlaceDistance from epicenterAverage reported Shaking IntensityNr. of reportsTokyo, Tokyo, Japan(Pop.: 9,733,276)242 km (150 mi)N of epicenterIII: Weak shaking1Note: Only reports with latitude/longitude coordinate positions given (2 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 (*)III: Weak shaking2239–241 km (149–150 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 (2 in total) could be used for geographic statistics.Get the Android appI 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 GMT2026-08-21EpicenterAgency5.549 km30 mi12:02:06.8IZU ISLANDS, JAPAN REGIONEMSC (European-Mediterranean Seismological Centre)"; HTMLcontent += ""; mainMap.addToMap("station"+id, lat, lon, title,HTMLcontent); mainMap.map.panTo([lat,lon]); document.getElementById("map_canvas").scrollIntoView();}document.addEventListener("DOMContentLoaded", function () { var section = document.getElementById("seismogramSection"); if (!section) return; var images = section.querySelectorAll("img.waitBg"); if (!images.length) return; images.forEach(function(img, index){ img.addEventListener("error", function(){ // If the first image fails, hide the whole section. if (index === 0) { // Remove TOC entry var tocLink = document.querySelector('#toc .tocLink[data-href="seismogramSection"]'); if (tocLink) {tocLink.remove()} // Remove whole section section.remove(); } // Otherwise remove only this station. var plot = img.closest(".plotContainer"); if (!plot) return; var station = plot.previousElementSibling; var caption = plot.nextElementSibling; if (station) station.remove(); plot.remove(); if (caption) caption.remove(); // Remove empty "Show more" var more = document.getElementById("moreSeismograms"); if (more && !more.querySelector(".plotContainer")) { more.remove(); var btn = document.getElementById("moreSeismograms_1"); if (btn) btn.remove(); } // Hide section if nothing remains. if (!section.querySelector(".plotContainer")) { section.style.display = "none"; } }, { once: true }); });});]]>SeismogramsSeismic station: Matsushiro, Japan (MAJO/IU network) | Distance from quake: 391 km / 243 mi | Show on map | Station InfoSeismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Bandpass filter applied: 0.1-5.0 Hz. Source: NSF SAGE Facility IRISWS timeseriesplot Web ServiceSeismic station: Erimo, Hokkaido Island, Japan (ERM/II network) | Distance from quake: 951 km / 591 mi | Show on map | Station InfoShow moreAftershocks 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 32 km2 (12 square miles) as a first-order estimate. The length of the rupture zone thus was probably around 10 km (6 mi).[More info]Recorded aftershocks, latest first (0 quake)Aug 21, 2026 09:02 pm (GMT +9)5 minutes ago - felt5.549 km0 km - This quakeIzu Islands, Japan RegionMain 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 547 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 7 or higher: 0.03 quakes per year (or 1 quake every 31.3 years)Mag. 6 or higher: 0.2 quakes per year (or 1 quake every 5 years)Mag. 5 or higher: 2.3 quakes per yearMag. 4 or higher: 19.7 quakes per yearMag. 3 or higher: 58 quakes per year (or 4.8 quakes per month)Mag. 2 or higher: 243 quakes per year (or 20.2 quakes per month)Mag. 1 or higher: 521 quakes per year (or 43 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 7 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 30 to 35 years.Number of quakes per yearPrevious quakes in the same area of this earthquake