Light mag. 3.9 earthquake - 29 km east of Copiapo, Copiapo, Region de Atacama, Chile, on Sunday, Jul 20, 2025, at 12:50 am (Universal Time)

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Light magnitude 3.9 earthquake at 102 km depth20 Jul 00:53 UTC: First to report: VolcanoDiscovery after 3 minutes.20 Jul 00:54: Now using data updates from EMSC20 Jul 00:56: Now using data updates from CSN20 Jul 01:02: Magnitude recalculated from 3.5 to 3.9. Hypocenter depth recalculated from 64.00 to 102.00 km (from 40 to 63 mi). Epicenter location corrected by 9.7 km (6 mi) towards WNW.I didn't feel itI felt this quakeEarthquake detailsDate & timeJul 20, 2025 00:50:31 UTC - Local time at epicenterSunday, Jul 20, 2025, at 12:50 am (Universal Time GMT +0)StatusconfirmedMagnitude3.9Depth102 kmEpicenter latitude / longitude27.276°S / 70.057°WCopiapo, Region de Atacama, ChileSeismic antipode27.276°N / 109.943°EShaking intensityII Very weak shakingFelt1 reportPrimary data sourceCSN (National Seismological Center (Centro Sismológico Nacional))Nearest volcanoEl Solo (134 km / 83 mi)Weather at epicenter at time of quakeClear Sky 15.2°C (59 F), humidity: 63%, wind: 2 m/s (3 kts) from EEstimated seismic energy released4.5 x 1010 joules (12.4 megawatt hours, equivalent to 10.7 tons of TNT) | equivalent to ONE quake of magnitude 3.9 | about seismic energy14 minutes ago reported feltJul 20, 2025 00:50 GMT / Jul 20, 2025 12:50 am (Universal Time)Lat / Lng: -27.276 / -70.057: 29 km Al E De CopiapóSource: CSNOther sources: EMSC: 3.5 / 64 kmDetail info | Read user reports | You felt it? - Report it!';storedMarkers.push(['quake-21974459',-27.27600,-70.05700,'14 minutes ago: Mag. 3.9, 29 km Al E De Copiapó',html,'quakes-5-24.png',18,18,9,9,124]); 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 ChileNearby placesThe closest larger town where the quake might have been felt is Copiapo, a city with more than 130,000 inhabitants in Chile, in 29 km (18 mi) distance west of the epicenter. People likely experienced very weak shaking there. In the capital of  Chile, Santiago, 690 km (429 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(*)RegionCountry29 km (18 mi)W of epicenterCopiapo(pop: 129,300)II: Very weakCopiapo, Region de AtacamaChile99 km (61 mi)N of epicenterDiego de Almagro(pop: 18,100)II: Very weakChanaral, Region de AtacamaChile160 km (100 mi)SW of epicenterVallenar(pop: 44,900)I: Not feltHuasco, Region de AtacamaChile212 km (132 mi)N of epicenterTaltal(pop: 10,000)I: Not feltProvincia de Antofagasta, Region de AntofagastaChile245 km (152 mi)E of epicenterFiambala(pop: 8,060)I: Not feltDepartamento de Tinogasta, Catamarca ProvinceArgentina245 km (153 mi)SE of epicenterVinchina(pop: 2,830)I: Not feltLa Rioja ProvinceArgentina261 km (162 mi)E of epicenterTinogasta(pop: 14,500)I: Not feltCatamarca ProvinceArgentina296 km (184 mi)NE of epicenterAntofagasta de la Sierra(pop: 500)I: Not feltCatamarca ProvinceArgentina327 km (203 mi)SE of epicenterChilecito(pop: 42,200)I: Not feltLa Rioja ProvinceArgentina690 km (429 mi)S of epicenterSantiago(pop: 4,837,300): Not feltSantiago MetropolitanChileNotes:(*) Shaking intensity according to the Modified Mercalli Intensity Scale (MMI) and estimated using seismic models.User-reports for this quake (1)The first report about ground shaking reached us after only 3 minutes, before other agencies reported it. So far, we have received 1 report for this quake. This section is being updated as new data comes in.User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.Contribute:Leave a comment if you find a particular report interesting or want to add to it.Flag as inappropriate.Mark as helpful or interesting.Send your own user report!TranslateCopiapó (29.8 km WSW of epicenter) [Map] / Very weak shaking (MMI II) / very short : Mucho ruido   What is Intensity and the Mercalli Intensity Scale?The amount of shaking that occurs on the surface due to an earthquake is called the intensity. It is commonly measured on the so-called Modified Mercalli Intensity Scale (MMI) ranging from 1 (not felt) to 10 (extreme shaking), and given in Roman numerals as I,II,...IX, X, and often displayed with color codes ranging from light blue to dark red.Earthquake intensity depends mainly on the magnitude and depth of the quake as well as the distance from the epicenter: The further away, the less shaking intensity occurs.Read more about the MMI scale!Number of reports by intensityShaking intensityNumber of reportsMin-Max distance from epicenter (*)Average distance (*)II: Very weak shaking130–30 km (18.5–18.5 mi)30 km (18 mi)Notes(*) Reports are filtered to exclude those that are likely highly inaccurate or esaggerated.Only reports with latitude/longitude coordinate positions given (1 in total) could be used for geographic statistics.I didn't feel itI felt this quakeIf you were near the epicenter and felt it, please share your experience and submit a short "I felt it" report! Other users would love to hear about it!If you did NOT feel the quake although you were in the area, please report it as well! Your contribution is valuable to earthquake science and seismic hazard analysis.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 GMT2025-07-20EpicenterAgency3.9102 km63 mi00:50:3129 km al E de CopiapóCSN (National Seismological Center (Centro Sismológico Nacional))3.564 km40 mi00:50:33ATACAMA, CHILE9.9 km (6.1 mi) epicenter difference with CSNEMSC (European-Mediterranean Seismological Centre)Previous quakes in the same area of this earthquakeThe earthquake occurred 6 weeks after a magnitude 6.4 earthquake had hit on Friday, Jun 6, 2025, at 02:15 pm local time (America/Santiago GMT -3) in 46 km (29 mi) distance to the north:Mag. 6.4 earthquake 58 km north of Copiapo - Region de Atacama, Chile - Jun 6, 2025 - This was also the strongest quake in this area in at least 10 years. The strongest-ever (since 1900) recorded quake in this area measured magnitude 8.5. It had occurred 103 years ago earlier, on Saturday, Nov 11, 1922, at 04:32 am local time (Universal Time GMT +0) in Region de Atacama,  Chile:Mag. 8.5 earthquake Copiapo - Region de Atacama, Chile - Nov 11, 1922 - Below is a list and map of larger or recent quakes that had occurred near the epicenter before this earthquake (within up to 100 km/61 mi distance, up to 300 km/183 mi for very large quakes above mag. 7). Filter and sort the list by magnitude or time.Max results102050100AllMagnitudeAll2+3+4+5+6+7+8+Time before48 hours1 week30 days1 year5 years30 yearsAny ageDate and TimeMagDepthDistanceLocationDetailsMapJun 30, 10:09 am (GMT -4)3.3107 km16 km (10.1 mi) to the E 42 km east of Copiapo, Copiapo, Region de Atacama, ChileInfoJun 26, 05:35 am (GMT -4)3.0114 km53 km (33 mi) to the E 78 km east of Copiapo, Copiapo, Region de Atacama, ChileInfoJun 22, 10:15 pm (Santiago)3.053 km64 km (40 mi) to the NW 51 km northwest of Copiapo, Copiapo, Region de Atacama, Chile 1 reportInfoJun 11, 07:13 am (Santiago)3.788 km43 km (26 mi) to the S 40 km southeast of Copiapo, Copiapo, Region de Atacama, ChileInfoJun 6, 11:45 pm (Santiago)3.7100 km19 km (12 mi) to the NE 47 km northeast of Copiapo, Copiapo, Region de Atacama, ChileInfoJun 6, 02:15 pm (Santiago)6.466 km46 km (29 mi) to the N 58 km north of Copiapo, Copiapo, Region de Atacama, Chile 28 reportsInfoApr 26, 02:17 am (Santiago)3.873 km65 km (41 mi) to the SW 37 km southwest of Copiapo, Copiapo, Region de Atacama, Chile 1 reportInfoApr 22, 09:47 am (Santiago)3.8116 km64 km (40 mi) to the SE 85 km east of Copiapo, Copiapo, Region de Atacama, ChileInfoJul 22, 2020 06:25 pm (Santiago)5.0126 km38 km (24 mi) to the W 15 km northwest of Copiapo, Copiapo, Region de Atacama, Chile 1 reportInfoMay 29, 2020 01:32 pm (Catamarca)5.0110 km109 km (68 mi) to the E Northern ChileInfoJun 5, 2019 12:19 pm (Santiago)5.276 km16 km (9.8 mi) to the S 22 km east of Copiapo, Copiapo, Region de Atacama, Chile 1 reportInfoApr 16, 2016 03:05 am (Santiago)5.254 km93 km (58 mi) to the N Northern Chile 3 reportsInfoMar 9, 2011 09:24 am (Santiago)5.2101 km100 km (62 mi) to the E 124 km east of Copiapo, Copiapo, Region de Atacama, ChileInfoFeb 9, 2011 10:12 pm (Santiago)5.262 km46 km (29 mi) to the SW 28 km south of Copiapo, Copiapo, Region de Atacama, ChileInfoFeb 8, 2011 09:03 am (Santiago)5.495 km65 km (40 mi) to the SE 85 km east of Copiapo, Copiapo, Region de Atacama, ChileInfoMay 17, 2009 08:35 am (Santiago)5.294 km42 km (26 mi) to the E 70 km east of Copiapo, Copiapo, Region de Atacama, ChileInfoOct 27, 2008 03:08 pm (Santiago)5.1113 km73 km (45 mi) to the E 101 km east of Copiapo, Copiapo, Region de Atacama, ChileInfoNov 6, 2006 10:51 am (Santiago)5.264 km83 km (51 mi) to the NW 52 km southwest of Diego de Almagro, Chanaral, Region de Atacama, ChileInfoApr 30, 2006 10:49 pm (Santiago)5.424 km89 km (55 mi) to the WSouth Pacific Ocean, 64 km west of Copiapo, Copiapo, Region de Atacama, ChileInfoAug 26, 2004 08:43 pm (Santiago)5.930 km76 km (47 mi) to the W 47 km west of Copiapo, Copiapo, Region de Atacama, ChileInfoApr 18, 2002 12:08 pm (Santiago)6.762 km60 km (37 mi) to the SW 31 km southwest of Copiapo, Copiapo, Region de Atacama, ChileInfoMay 16, 1997 10:10 pm (Santiago)5.5106 km57 km (35 mi) to the E 85 km east of Copiapo, Copiapo, Region de Atacama, ChileInfoOct 31, 1990 10:39 am (Santiago)5.660 km83 km (51 mi) to the NWChanaral, 83 km north of Copiapo, Copiapo, Region de Atacama, ChileInfoFeb 5, 1988 10:01 am (Santiago)7.237 km283 km (176 mi) to the N 123 km south of Antofagasta, Provincia de Antofagasta, Region de Antofagasta, ChileInfoJan 26, 1986 03:48 am (Santiago)5.431 km88 km (55 mi) to the WSouth Pacific Ocean, 67 km northwest of Copiapo, Copiapo, Region de Atacama, ChileInfoOct 4, 1983 02:52 pm (Santiago)7.415 km96 km (60 mi) to the NW 54 km WSW of Diego De Almagro, ChileInfoAug 5, 1982 05:16 am (Santiago)5.440 km89 km (55 mi) to the NW 83 km northwest of Copiapo, Copiapo, Region de Atacama, ChileInfoApr 6, 1979 01:48 pm (Santiago)5.455 km79 km (49 mi) to the SW 52 km southwest of Copiapo, Copiapo, Region de Atacama, ChileInfoJun 28, 1978 03:27 am (Santiago)5.382 km29 km (18 mi) to the S 30 km southeast of Copiapo, Copiapo, Region de Atacama, ChileInfoMar 28, 1978 03:06 am (Santiago)5.933 km81 km (50 mi) to the S 67 km south of Copiapo, Copiapo, Region de Atacama, ChileInfoJun 30, 1977 07:13 am (Santiago)5.246 km44 km (28 mi) to the E 73 km east of Copiapo, Copiapo, Region de Atacama, ChileInfoFeb 24, 1976 02:10 pm (Santiago)5.248 km66 km (41 mi) to the NE 95 km northeast of Copiapo, Copiapo, Region de Atacama, ChileInfoJul 3, 1973 05:41 pm (Santiago)5.46 km89 km (55 mi) to the W 65 km west of Copiapo, Copiapo, Region de Atacama, ChileInfoDec 28, 1966 04:18 am (Santiago)7.625 km204 km (127 mi) to the N Antofagasta, ChileInfoAug 8, 1966 06:57 am (Catamarca)5.4108 km108 km (67 mi) to the E 131 km E of Copiapó, ChileInfoDec 2, 1960 05:10 am (Santiago)7.335 km284 km (176 mi) to the N 121 km south of Antofagasta, Provincia de Antofagasta, Region de Antofagasta, ChileInfoJun 11, 1956 05:56 am (Santiago)5.835 km88 km (55 mi) to the W 60 km west of Copiapo, Copiapo, Region de Atacama, ChileInfoApr 18, 1939 06:22 am (Universal Time)7.435 km81 km (50 mi) to the W 56 km west of Copiapo, Copiapo, Region de Atacama, ChileInfoJul 13, 1936 11:12 am (Universal Time)7.535 km285 km (177 mi) to the N 121 km south of Antofagasta, Provincia de Antofagasta, Region de Antofagasta, ChileInfoJul 9, 1935 06:41 am (Universal Time)5.935 km74 km (46 mi) to the NW 58 km northwest of Copiapo, Copiapo, Region de Atacama, ChileInfoNov 11, 1922 04:32 am (Universal Time)8.570 km115 km (71 mi) to the SCopiapo, 94 km east of Vallenar, Huasco, Region de Atacama, ChileInfoDec 4, 1918 11:47 am (Universal Time)8.040 km108 km (67 mi) to the NW 61 km west of Diego de Almagro, Chanaral, Region de Atacama, ChileInfoSep 6, 1910 08:03 pm (Universal Time)6.835 km65 km (41 mi) to the W 37 km west of Copiapo, Copiapo, Region de Atacama, ChileInfoSep 6, 1910 07:59 pm (Universal Time)7.10 km253 km (157 mi) to the N 155 km south of Antofagasta, Provincia de Antofagasta, Region de Antofagasta, ChileInfoJun 8, 1909 01:46 am (Santiago)7.60 km97 km (60 mi) to the NWChanaral, 98 km north of Copiapo, Copiapo, Region de Atacama, ChileInfoDec 7, 1903 02:44 pm (Universal Time)6.80 km31 km (19 mi) to the N 52 km northeast of Copiapo, Copiapo, Region de Atacama, ChileInfoMap of earlier quakes in the area of this quakeMax results102050100AllMagnitudeAll2+3+4+5+6+7+8+Time before48 hours1 week30 days1 year5 years30 yearsAny ageOldest quakes are shown in yellow, most recent in red.[quakes -][quakes +][smaller][bigger]