Moderate magnitude 4.9 earthquake at 104 km depth20 Oct 03:07 UTC: First to report: GFZ after 13 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeOct 20, 2026 02:54:13 UTC - Local time at epicenterTuesday, Oct 20, 2026, at 02:54 am (Universal Time GMT +0)Statuspreliminary (automatic detection)Magnitude4.94Depth104 kmEpicenter latitude / longitude18.248°N / 146.065°ENorthern Mariana IslandsSeismic antipode18.248°S / 33.935°WShaking intensityIII Weak shaking near epicenterFelt0 reportsPrimary data sourceGFZ (German Research Centre for Geosciences)Nearest volcanoPagan (31 km / 19 mi)Estimated seismic energy released1.4 x 1012 joules (392 megawatt hours, equivalent to 338 tons of TNT) | equivalent to ONE quake of magnitude 4.9 | about seismic energy14 minutes agoOct 20, 2026 02:54 GMT / Oct 20, 2026 02:54 am (Universal Time)Lat / Lng: 18.248 / 146.065: Northern Mariana Islands: Mariana IslandsSource: GFZDetail info | You felt it? - Report it!';storedMarkers.push(['quake-23450580',18.24800,146.06500,'14 minutes ago: Mag. 4.9, Northern Mariana Islands: Mariana Islands',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 hrsNearby placesThe closest larger town where the quake might have been felt is Pagan Village, a town with 50 inhabitants in the Northern Mariana Islands, in 35 km (22 mi) distance southwest of the epicenter. People likely experienced weak shaking there. In the capital of Guam, Hagatna, 549 km (341 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(*)RegionCountry35 km (22 mi)SW of epicenterPagan Village(pop: 50)III: WeakPagan Island, Northern Islands Northern Mariana Islands70 km (43 mi)NW of epicenterAgrihan Village(pop: 20)III: WeakAgrihan Island, Northern Islands Northern Mariana Islands75 km (47 mi)S of epicenterPatik Camp(pop: 15)III: WeakAlamagan Island, Northern Islands Northern Mariana Islands339 km (211 mi)S of epicenterSaipan(pop: 48,200)II: Very weakSaipan Northern Mariana Islands368 km (229 mi)S of epicenterSan Jose(pop: 15,000)II: Very weakTinian Municipality Northern Mariana Islands467 km (290 mi)S of epicenterSongsong(pop: 593)II: Very weakRota Northern Mariana Islands539 km (335 mi)S of epicenterYigo Village(pop: 20,500)I: Not feltYigo Municipality Guam542 km (337 mi)S of epicenterDededo Village(pop: 44,900)I: Not feltDededo Guam547 km (340 mi)S of epicenterTamuning-Tumon-Harmon Village(pop: 19,700)I: Not feltTamuning Guam549 km (341 mi)S of epicenterHagatna(pop: 1,050)I: Not feltHagatna Guam551 km (342 mi)S of epicenterMangilao Village(pop: 15,200)I: Not feltMangilao Guam561 km (349 mi)S of epicenterSanta Rita(pop: 7,500)I: Not feltSanta Rita Municipality Guam571 km (355 mi)S of epicenterInarajan Village(pop: 3,050)I: Not feltInarajan GuamNotes:(*) 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 GMT2026-10-20EpicenterAgency4.94104 km64 mi02:54:13.74Mariana IslandsGFZ (German Research Centre for Geosciences)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 8 km2 (3 square miles) as a first-order estimate. The length of the rupture zone thus was probably around 5 km (3 mi).[More info]Recorded aftershocks, latest first (0 quake)Oct 20, 2026 02:54 am (Universal Time)14 minutes ago4.9104 km0 km - This quakeNorthern Mariana Islands: Mariana IslandsMain 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 72 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 7 or higher: 0.02 quakes per year (or 1 quake every 41.7 years)Mag. 6 or higher: 0.17 quakes per year (or 1 quake every 5.7 years)Mag. 5 or higher: 3.4 quakes per yearMag. 4 or higher: 65 quakes per year (or 5.4 quakes per month)Mag. 3 or higher: 72 quakes per year (or 6 quakes per month)Mag. 2 or higher: 72 quakes per year (or 6 quakes per month)The area where this quake occurred has a very high level of seismic activity. It has had at least 3 quakes above magnitude 7 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 40 to 45 years.Number of quakes per yearPrevious quakes in the same area of this earthquake