Moderate magnitude 4.2 earthquake at 78 km depth22 Mar 09:04 UTC: First to report: NIED after 8 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeMar 22, 2026 08:56:03 UTC - Local time at epicenterSunday, Mar 22, 2026, at 05:56 pm (GMT +9)Statusconfirmed (manually revised)Magnitude4.2Depth78 kmEpicenter latitude / longitude34.312°N / 140.304°EJapanSeismic antipode34.312°S / 39.696°WShaking intensityII Very weak shakingFelt0 reportsPrimary data sourceNIED (National Research Institute for Earth Science and Disaster Resilience)Nearest volcanoMiyake-shima (76 km / 47 mi)Weather at epicenter at time of quakeOvercast Clouds 15.6°C (60 F), humidity: 64%, wind: 7 m/s (14 kts) from SSWEstimated 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 energy10 minutes ago reported feltMar 22, 2026 08:56 GMT / Mar 22, 2026 05:56 pm (GMT +9)Lat / Lng: 34.312 / 140.304: Japan: Far S Off Boso PeninsulaSource: NIEDDetail info | Read user reports | You felt it? - Report it!';storedMarkers.push(['quake-22832025',34.31200,140.30400,'10 minutes ago: Mag. 4.2, Japan: Far S Off Boso Peninsula',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 Tateyama, a town with 50,000 inhabitants in Japan, in 85 km (53 mi) distance northwest of the epicenter. People likely experienced very 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, 163 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(*)RegionCountry76 km (47 mi)W of epicenterMiyake(pop: 2,270)II: Very weakTokyoJapan85 km (53 mi)NW of epicenterTateyama(pop: 50,100)II: Very weakChibaJapan87 km (54 mi)NW of epicenterMinamiboso(pop: 35,800)II: Very weakMinamiboso Shi, ChibaJapan89 km (55 mi)N of epicenterKamogawa(pop: 32,100)II: Very weakChibaJapan93 km (58 mi)N of epicenterKatsuura(pop: 16,900)II: Very weakChibaJapan103 km (64 mi)N of epicenterIsumi(pop: 35,500)II: Very weakChibaJapan111 km (69 mi)NW of epicenterMiura(pop: 51,500)II: Very weakKanagawaJapan116 km (72 mi)NW of epicenterKurihama(pop: 53,800)II: Very weakYokosuka Shi, KanagawaJapan120 km (74 mi)N of epicenterFuttsu(pop: 51,700)II: Very weakChibaJapan122 km (76 mi)N of epicenterKimitsu(pop: 83,100)II: Very weakChibaJapan123 km (76 mi)NW of epicenterYokosuka(pop: 409,500)II: Very weakKanagawaJapan124 km (77 mi)N of epicenterKisarazu(pop: 136,200)II: Very weakChibaJapan124 km (77 mi)N of epicenterMobara(pop: 88,300)II: Very weakChibaJapan125 km (78 mi)N of epicenterSodegaura(pop: 64,900)II: Very weakChibaJapan128 km (79 mi)NW of epicenterZushi(pop: 60,100)II: Very weakKanagawaJapan131 km (81 mi)NW of epicenterKamakura(pop: 172,900)II: Very weakKanagawaJapan133 km (83 mi)NW of epicenterIto(pop: 68,800)II: Very weakIto Shi, ShizuokaJapan136 km (84 mi)N of epicenterIchihara(pop: 283,500)II: Very weakChibaJapan138 km (86 mi)NW of epicenterFujisawa(pop: 439,700)II: Very weakKanagawaJapan138 km (86 mi)NW of epicenterYokohama(pop: 3,777,500)II: Very weakKanagawaJapan140 km (87 mi)NW of epicenterChigasaki(pop: 242,800)II: Very weakKanagawaJapan143 km (89 mi)NW of epicenterHiratsuka(pop: 258,400)II: Very weakKanagawaJapan144 km (90 mi)N of epicenterChiba(pop: 979,800)II: Very weakChibaJapan145 km (90 mi)N of epicenterKawasaki(pop: 1,538,300)II: Very weakKanagawaJapan145 km (90 mi)NW of epicenterEbina(pop: 136,500)II: Very weakKoza-gun, KanagawaJapan148 km (92 mi)NW of epicenterOdawara(pop: 188,900)II: Very weakKanagawaJapan149 km (93 mi)N of epicenterOta(pop: 748,100)II: Very weakOta-ku, TokyoJapan149 km (93 mi)N of epicenterYotsukaido(pop: 95,300)II: Very weakYotsukaido Shi, ChibaJapan151 km (94 mi)NW of epicenterYamato(pop: 242,100)II: Very weakKanagawaJapan151 km (94 mi)NW of epicenterIsehara(pop: 103,400)II: Very weakKanagawaJapan152 km (94 mi)NW of epicenterAtsugi(pop: 224,000)II: Very weakKanagawaJapan153 km (95 mi)NW of epicenterMinamirinkan(pop: 224,000)II: Very weakYamato-shi, KanagawaJapan154 km (95 mi)NW of epicenterHadano(pop: 163,800)II: Very weakKanagawaJapan154 km (96 mi)N of epicenterNarashino(pop: 176,200)II: Very weakChibaJapan154 km (96 mi)N of epicenterUrayasu(pop: 171,400)II: Very weakChibaJapan155 km (96 mi)NW of epicenterZama(pop: 132,300)II: Very weakKanagawaJapan155 km (96 mi)NW of epicenterMishima(pop: 107,900)II: Very weakShizuokaJapan156 km (97 mi)N of epicenterSakura(pop: 173,700)II: Very weakChibaJapan157 km (98 mi)NW of epicenterMachida(pop: 431,100)II: Very weakTokyoJapan163 km (101 mi)N of epicenterTokyo(pop: 9,733,300)II: Very weakTokyoJapanNotes:(*) Shaking intensity according to the Modified Mercalli Intensity Scale (MMI) and estimated using seismic models.User-reports for this quake (1)So far, we have received 1 report for 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.Translate251.9 km N of epicenter [Map] / not felt (reported through our app)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 (*)I: Not felt1252–252 km (156–156 mi)252 km (156 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.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 GMT2026-03-22EpicenterAgency4.278 km48 mi08:56:03FAR S OFF BOSO PENINSULANIED (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)Mar 22, 2026 05:56 pm (GMT +9)10 minutes ago4.278 km0 km - This quakeNorth Pacific Ocean, 85 km SE of Tateyama, Chiba, 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 1,000 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 6 or higher: 0.14 quakes per year (or 1 quake every 7.2 years)Mag. 5 or higher: 2.5 quakes per yearMag. 4 or higher: 16.5 quakes per yearMag. 3 or higher: 55 quakes per year (or 4.6 quakes per month)Mag. 2 or higher: 281 quakes per year (or 23.4 quakes per month)Mag. 1 or higher: 914 quakes per year (or 76 quakes per month)The area where this quake occurred has a very high level of seismic activity. It has had at least 17 quakes above magnitude 6 since 1900, 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