Moderate magnitude 4.2 earthquake at 166 km depth23 Apr 20:31 UTC: First to report: BMKG after 7 minutes.I didn't feel itI felt this quakeEarthquake detailsDate & timeApr 23, 2026 20:24:09 UTC - Local time at epicenterThursday, Apr 23, 2026, at 08:24 pm (Universal Time GMT +0)Statusconfirmed (manually revised)Magnitude4.2Depth166 kmEpicenter latitude / longitude2.9°N / 128.04°EIndonesiaSeismic antipode2.9°S / 51.96°WShaking intensityII Very weak shakingFelt0 reportsPrimary data sourceBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)Nearest volcanoTarakan (121 km / 75 mi)Estimated 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 energy7 minutes agoApr 23, 2026 20:24 GMT / Apr 23, 2026 08:24 pm (Universal Time)Lat / Lng: 2.9 / 128.04: Halmahera, IndonesiaSource: BMKGDetail info | You felt it? - Report it!';storedMarkers.push(['quake-22938291',2.90000,128.04000,'7 minutes ago: Mag. 4.2, Halmahera, 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 Daruba, a town with 24,000 inhabitants in Indonesia, in 99 km (61 mi) distance south of the epicenter. People likely experienced very weak shaking there.The following table shows some of the places that might have been affected (or not) by the shaking.DistancePlaceMax. shaking intensity(*)RegionCountry99 km (61 mi)S of epicenterDaruba(pop: 23,600)II: Very weakKabupaten Pulau Morotai, North MalukuIndonesia123 km (76 mi)S of epicenterGalela(pop: 8,760)II: Very weakKabupaten Halmahera Utara, North MalukuIndonesia130 km (81 mi)S of epicenterTobelo(pop: 34,200)II: Very weakKabupaten Halmahera Utara, North MalukuIndonesia246 km (153 mi)S of epicenterTernate(pop: 204,900)I: Not feltNorth MalukuIndonesia246 km (153 mi)S of epicenterMaba(pop: 12,600)I: Not feltEast Halmahera Regency, North MalukuIndonesia246 km (153 mi)S of epicenterSofifi(pop: 36,200)I: Not feltKota Tidore Kepulauan, North MalukuIndonesia294 km (183 mi)W of epicenterTahuna(pop: 35,300)I: Not feltKabupaten Kepulauan Sangihe, Sulawesi UtaraIndonesia336 km (209 mi)NW of epicenterMiangas(pop: 816)I: Not feltSulawesi UtaraIndonesia355 km (221 mi)SW of epicenterBitung(pop: 137,400)I: Not feltSulawesi UtaraIndonesia399 km (248 mi)NW of epicenterSarangani(pop: 7,510)I: Not feltDavao Occidental, DavaoPhilippines419 km (261 mi)NW of epicenterNuing(pop: 2,610)I: Not feltDavao Occidental, DavaoPhilippines421 km (262 mi)NW of epicenterBalangonan(pop: 2,330)I: Not feltDavao Occidental, DavaoPhilippines422 km (262 mi)NW of epicenterKalbay(pop: 4,340)I: Not feltDavao Occidental, DavaoPhilippines444 km (276 mi)NW of epicenterBaliton(pop: 5,810)I: Not feltProvince of Sarangani, SoccsksargenPhilippinesNotes:(*) 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 GMT2026-04-23EpicenterAgency4.2166 km103 mi20:24:09Halmahera, IndonesiaBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)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)Apr 23, 2026 08:24 pm (Universal Time)7 minutes ago4.2166 km0 km - This quakeHalmahera, IndonesiaMain 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 175 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 62.5 years)Mag. 6 or higher: 0.2 quakes per year (or 1 quake every 5.1 years)Mag. 5 or higher: 4.9 quakes per yearMag. 4 or higher: 83 quakes per year (or 6.9 quakes per month)Mag. 3 or higher: 163 quakes per year (or 13.6 quakes per month)Mag. 2 or higher: 175 quakes per year (or 14.6 quakes per month)The area where this quake occurred has a very high level of seismic activity. It has had at least 2 quakes above magnitude 7 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