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The depth of the quake could not be determined, but is assumed to be shallow.The quake was not felt (or at least not reported so).Quake Data | Interactive map | Seismograms | User reports | Aftershocks | Earlier quakes here | State of Yap | Santa Rita Municipality | InarajanHint: Click on the image to see different maps of this quake!Strong magnitude 5.0 earthquake at unknown depth4 Oct 06:05 UTC: First to report: BMKG after 7 minutes.4 Oct 06:07: Magnitude recalculated from 5.0 to 4.9. Epicenter location corrected by 30 km (19 mi) towards ENE.4 Oct 06:09: Magnitude recalculated from 4.9 to 5.0. Epicenter location corrected by 38 km (23 mi) towards NE.I didn't feel itI felt this quakeEarthquake detailsDate & timeOct 4, 2026 05:57:48 UTC - Local time at epicenterSunday, Oct 4, 2026, at 03:57 pm (GMT +10)Statusunconfirmed (uncertain whether an earthquake with these data happened)Magnitude5.0Depth10 kmEpicenter latitude / longitude11.7°N / 139.78°EMicronesiaSeismic antipode11.7°S / 40.22°WBrazilShaking intensityV Moderate shaking near epicenterFelt0 reportsPrimary data sourceBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)Weather at epicenter at time of quakeOvercast Clouds 28.6°C (83 F), humidity: 79%, wind: 9 m/s (17 kts) from WSWEstimated seismic energy released2 x 1012 joules (554 megawatt hours, equivalent to 477 tons of TNT) | equivalent to ONE quake of magnitude 5.0 | about seismic energy16 minutes agoOct 4, 2026 05:57 GMT / Oct 4, 2026 03:57 pm (GMT +10)Lat / Lng: 11.7 / 139.78: Western Caroline Islands, MicronesiaSource: BMKGDetail info | You felt it? - Report it!';storedMarkers.push(['quake-23409545',11.70000,139.78000,'16 minutes ago: Mag. 5.0, Western Caroline Islands, Micronesia',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 hrsNearby placesThe closest larger town where the quake might have been felt is Fais, a town with 215 inhabitants in Micronesia, in 230 km (143 mi) distance south of the epicenter. People likely experienced very weak shaking there. In the capital of Guam, Hagatna, 574 km (357 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(*)RegionCountry230 km (143 mi)S of epicenterFais(pop: 215)II: Very weakState of Yap Micronesia303 km (188 mi)SW of epicenterColonia(pop: 7,370)II: Very weakWeloy Municipality, State of Yap Micronesia563 km (350 mi)E of epicenterSanta Rita(pop: 7,500)I: Not feltSanta Rita Municipality Guam567 km (352 mi)E of epicenterInarajan Village(pop: 3,050)I: Not feltInarajan Guam574 km (357 mi)E of epicenterHagatna(pop: 1,050)I: Not feltHagatna Guam578 km (359 mi)E of epicenterTamuning-Tumon-Harmon Village(pop: 19,700)I: Not feltTamuning Guam579 km (360 mi)E of epicenterMangilao Village(pop: 15,200)I: Not feltMangilao Guam585 km (364 mi)E of epicenterDededo Village(pop: 44,900)I: Not feltDededo Guam591 km (367 mi)E of epicenterYigo Village(pop: 20,500)I: Not feltYigo Municipality Guam624 km (388 mi)SE of epicenterFaraulep Village(pop: 221)I: Not feltFaraulep Municipality, State of Yap Micronesia641 km (399 mi)NE of epicenterSongsong(pop: 593)I: Not feltRota Northern Mariana Islands685 km (426 mi)SW of epicenterKayangel(pop: 188)I: Not feltState of Kayangel Palau712 km (443 mi)SE of epicenterIfalik Village(pop: 561)I: Not feltIfalik Municipality, State of Yap Micronesia723 km (449 mi)SW of epicenterUlimang(pop: 581)I: Not feltState of Ngaraard Palau737 km (458 mi)SW of epicenterNgchesar Hamlet(pop: 300)I: Not feltState of Ngchesar Palau739 km (459 mi)SW of epicenterImeong Hamlet(pop: 132)I: Not feltState of Ngeremlengui Palau750 km (466 mi)SW of epicenterNgchemiangel(pop: 270)I: Not feltState of Aimeliik Palau757 km (470 mi)SW of epicenterKoror Town(pop: 12,700)I: Not feltState of Koror Palau758 km (471 mi)SW of epicenterKoror(pop: 14,000)I: Not feltState of Koror PalauNotes:(*) 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 GMT2026-10-4EpicenterAgency5.010 km6.2 mi(*)05:57:48Western Caroline Islands, MicronesiaBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)Notes:(*) A depth given as 10 km often means that the the depth of the quake could be not determined with sufficient accuracy."; 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: Guam, Mariana Islands (GUMO/IU network) | Distance from quake: 591 km / 367 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: 0.02-4.0 Hz. Source: NSF SAGE Facility IRISWS timeseriesplot Web ServiceSeismic station: Davao, Philippines (DAV/IU network) | Distance from quake: 1640 km / 1019 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 10 km2 (4 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 4, 2026 03:57 pm (GMT +10)16 minutes ago5.010 km0 km - This quakePhilippine Sea, 303 km NE of Colonia, State of Yap, MicronesiaMain Shock (this quake)MoreMap of aftershocksEarthquake statisticsAverage number of earthquakesBased on data from the past 56 years and our earthquake archive back to 1900, there are about 3.7 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 6 or higher: 0.05 quakes per year (or 1 quake every 21.3 years)Mag. 5 or higher: 0.63 quakes per year (or 1 quake every 1.6 years)Mag. 4 or higher: 4 quakes per yearMag. 3 or higher: 6.8 quakes per yearMag. 2 or higher: 6.8 quakes per yearThe area where this quake occurred has a high level of seismic activity. It has had at least 6 quakes above magnitude 6 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 20 to 25 years.Number of quakes per yearPrevious quakes in the same area of this earthquake