Moderate magnitude 4.0 earthquake at unknown depth28 Jun 14:31 UTC: First to report: BMKG after 7 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeJun 28, 2026 14:24:01 UTC - Local time at epicenterSunday, Jun 28, 2026, at 02:24 pm (Universal Time GMT +0)Statusconfirmed (manually revised)Magnitude4.0Depth10 kmEpicenter latitude / longitude1.44°S / 136.79°EBiak Numfor Regency, Provinsi Papua, IndonesiaSeismic antipode1.44°N / 43.21°WShaking intensityIV Light shaking near epicenterFelt0 reportsPrimary data sourceBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)Estimated seismic energy released6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 tons of TNT) | equivalent to ONE quake of magnitude 4.0 | about seismic energy7 minutes agoJun 28, 2026 14:24 GMT / Jun 28, 2026 02:24 pm (Universal Time)Lat / Lng: -1.44 / 136.79: West Papua Region, IndonesiaSource: BMKGDetail info | You felt it? - Report it!';storedMarkers.push(['quake-23142118',-1.44000,136.79000,'7 minutes ago: Mag. 4.0, West Papua Region, Indonesia',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 BaliNearby placesThe closest larger town where the quake might have been felt is Biak, a town with 42,000 inhabitants in Indonesia, in 84 km (52 mi) distance west 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.The following table shows some of the places that might have been affected (or not) by the shaking.DistancePlaceMax. shaking intensity(*)RegionCountry78 km (49 mi)SW of epicenterSerui(pop: 13,600)II: Very weakKabupaten Kepulauan Yapen, Provinsi PapuaIndonesia84 km (52 mi)W of epicenterBiak(pop: 41,700)II: Very weakProvinsi PapuaIndonesia223 km (138 mi)E of epicenterSarmi(pop: 14,100)I: Not feltProvinsi PapuaIndonesia244 km (152 mi)S of epicenterBugalaga(pop: 3,580)I: Not feltKabupaten Intan Jaya, Central PapuaIndonesia257 km (160 mi)SW of epicenterNabire(pop: 43,900)I: Not feltCentral PapuaIndonesia286 km (178 mi)SE of epicenterMulia(pop: 35,900)I: Not feltKabupaten Puncak Jaya, Central PapuaIndonesia291 km (181 mi)W of epicenterRansiki(pop: 16,200)I: Not feltKabupaten Manokwari Selatan, Provinsi Papua BaratIndonesia310 km (193 mi)W of epicenterManokwari(pop: 107,300)I: Not feltProvinsi Papua BaratIndonesia312 km (194 mi)SE of epicenterKarubaga(pop: 6,700)I: Not feltKabupaten Tolikara, Highland PapuaIndonesia332 km (207 mi)SE of epicenterTiom(pop: 21,300)I: Not feltKabupaten Lanny Jaya, Highland PapuaIndonesia354 km (220 mi)SE of epicenterKobakma(pop: 13,100)I: Not feltKabupaten Mamberamo Tengah, Highland PapuaIndonesia380 km (236 mi)SE of epicenterWamena(pop: 41,800)I: Not feltKabupaten Jayawijaya, Highland PapuaIndonesia453 km (282 mi)E of epicenterJayapura(pop: 404,000)I: Not feltProvinsi PapuaIndonesiaNotes:(*) 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 GMT2026-06-28EpicenterAgency4.010 km6.2 mi(*)14:24:01West Papua Region, IndonesiaBMKG (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.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 1 km2 (0 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)Jun 28, 2026 02:24 pm (Universal Time)7 minutes ago4.010 km0 km - This quakeWest Papua Region, IndonesiaMain 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 25 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 8 or higher: 0.02 quakes per year (or 1 quake every 62.5 years)Mag. 7 or higher: 0.04 quakes per year (or 1 quake every 25 years)Mag. 6 or higher: 0.12 quakes per year (or 1 quake every 8.4 years)Mag. 5 or higher: 1.87 quakes per yearMag. 4 or higher: 8.1 quakes per yearMag. 3 or higher: 21.2 quakes per yearMag. 2 or higher: 26.4 quakes per yearThe area where this quake occurred has a very high level of seismic activity. It has had at least 2 quakes above magnitude 8 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 60 to 65 years.Number of quakes per yearPrevious quakes in the same area of this earthquake