Moderate mag. 4.0 earthquake (unconfirmed) - Aegean Sea, 21 km west of Nisi Skyros Island, Euboea, Central Greece, Greece, on Thursday, Jul 17, 2025, at 12:00 am (GMT +3)

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- Report it!';storedMarkers.push(['quake-21964886',38.92220,24.34470,'5 minutes ago: Mag. 4.0, Greece: Aegean Sea',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+="&notFelt=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 CreteNearby placesThe closest larger town where the quake might have been felt is Chalkida, a town with 59,000 inhabitants in Greece, in 82 km (51 mi) distance southwest of the epicenter. People likely experienced very weak shaking there. Many smaller towns and villages are located closer to the epicenter and might have experienced stronger shaking. In the capital of  Greece, Athens, 117 km (73 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(*)RegionCountry19 km (12 mi)E of epicenterSkyros(pop: 1,730)III: WeakEuboea, Central GreeceGreece38 km (24 mi)SW of epicenterKymi(pop: 2,980)III: WeakEuboea, Central GreeceGreece48 km (30 mi)NW of epicenterPatitirion(pop: 1,630)III: WeakNomos Magnisias, ThessalyGreece52 km (32 mi)NW of epicenterGerakas(pop: 62)III: WeakNomos Magnisias, ThessalyGreece57 km (35 mi)SW of epicenterSeta(pop: 60)III: WeakEuboea, Central GreeceGreece58 km (36 mi)W of epicenterSkopelos(pop: 2,890)III: WeakNomos Magnisias, ThessalyGreece62 km (39 mi)SW of epicenterAliveri(pop: 5,180)II: Very weakEuboea, Central GreeceGreece69 km (43 mi)NW of epicenterGlossa(pop: 987)II: Very weakNomos Magnisias, ThessalyGreece70 km (44 mi)S of epicenterZarakes(pop: 936)II: Very weakEuboea, Central GreeceGreece72 km (45 mi)SW of epicenterPsachna(pop: 5,830)II: Very weakEuboea, Central GreeceGreece75 km (46 mi)SW of epicenterEretria(pop: 4,170)II: Very weakEuboea, Central GreeceGreece76 km (47 mi)W of epicenterMantoudi(pop: 1,790)II: Very weakEuboea, Central GreeceGreece78 km (49 mi)W of epicenterSkiathos(pop: 5,190)II: Very weakNomos Magnisias, ThessalyGreece80 km (49 mi)SW of epicenterAyioi Apostoloi(pop: 1,900)II: Very weakNomarchia Anatolikis Attikis, AtticaGreece81 km (50 mi)S of epicenterDiliso(pop: 28)II: Very weakEuboea, Central GreeceGreece81 km (50 mi)SW of epicenterKakoperato(pop: 45)II: Very weakEuboea, Central GreeceGreece82 km (51 mi)SW of epicenterChalkida(pop: 59,100)II: Very weakEuboea, Central GreeceGreece84 km (52 mi)SW of epicenterPontioi(pop: 308)II: Very weakNomarchia Anatolikis Attikis, AtticaGreece87 km (54 mi)S of epicenterGrammatiko(pop: 1,430)II: Very weakNomarchia Anatolikis Attikis, AtticaGreece91 km (57 mi)SW of epicenterAfidnes(pop: 1,910)II: Very weakNomarchia Anatolikis Attikis, AtticaGreece92 km (57 mi)SW of epicenterSchimatari(pop: 4,040)II: Very weakNomos Voiotias, Central GreeceGreece92 km (57 mi)SW of epicenterLoukisia(pop: 1,160)II: Very weakEuboea, Central GreeceGreece94 km (58 mi)SW of epicenterAvlonas(pop: 5,740)II: Very weakNomarchia Anatolikis Attikis, AtticaGreece100 km (62 mi)SW of epicenterEleonas(pop: 655)II: Very weakNomos Voiotias, Central GreeceGreece105 km (65 mi)SW of epicenterSkourta(pop: 982)II: Very weakNomos Voiotias, Central GreeceGreece117 km (73 mi)SW of epicenterAthens(pop: 664,000)II: Very weakNomarchia Athinas, AtticaGreeceNotes:(*) 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!Compare 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 GMT2025-07-16EpicenterAgency4.010 km6.2 mi(*)21:00:37Aegean SeaRaspberryShake (RaspberryShake)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)Jul 16, 2025 09:00 pm (Universal Time)5 minutes ago4.010 km0 km - This quakeGreece: Aegean SeaMain Shock (this quake)MoreMap of aftershocksPrevious quakes in the same area of this earthquake5 minutes agoJul 16, 2025 21:00 GMT / Jul 16, 2025 09:00 pm (Universal Time)Lat / Lng: 38.9222 / 24.3447: Greece: Aegean SeaSource: RaspberryShakeDetail info | You felt it? - Report it!',4.0,40, '#bb202a', 0.9,1.5, '#bb202a', 0.27);map2.addToMap('thisQuake',38.9222,24.3447,'5 minutes ago: Mag. 4.0, Greece: Aegean Sea','Earthquake: Mag 4.0 / 10 km (6.2 mi) depth5 minutes agoJul 16, 2025 21:00 GMT / Jul 16, 2025 09:00 pm (Universal Time)Lat / Lng: 38.9222 / 24.3447: Greece: Aegean SeaSource: RaspberryShakeDetail info | You felt it? - Report it!','default'); // this will be local to this table obj function putQuakeOnMap(id,lat,lon,time,title,html,mag,zIndex) { qTableOlder.putQuakeOnMap(id,lat,lon,time,title,html,mag,zIndex); } map2.circleScale=0.5;qTableOlder.usePalette=1;qTableOlder.startVal=qTableOlder.referenceTime-(80*365.25*86400);qTableOlder.endVal=qTableOlder.referenceTime; qTableOlder.assignMap(map2); (async function(){await new Promise(r => setTimeout(r,4000));map2.map.setZoom(7)})(); })(); (async function(){while(typeof mkRequest=="undefined")await new Promise(r=>setTimeout(r,500));mkRequest("https://server2.allquakes.com/api/getPrevious.php?quakeId=21964886","get","",function(httpObj){let r=httpObj.responseText,d=document;if(""!=r&&200==httpObj.status){let o=JSON.parse(r);if(!o){d.getElementById("olderQuakesSection").remove();return};let table=d.getElementById("qTableOlder");table.innerHTML+=o.tableRows,qTableOlder.alternateBg(),d.getElementById("placeholder_largestQText").innerHTML=o.html,d.getElementById("sectionPreviousCWrap").style.display="",eval(o.js)}})})();]]>Sources: VolcanoDiscovery / VolcanoAdventures and other sources as noted.Use of material: Most text and images on our websites are owned by us. 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