Moderate magnitude 4.3 earthquake at unknown depth1 Aug 02:17 UTC: First to report: VolcanoDiscovery after 57 seconds.1 Aug 02:28: Now using data updates from INETER1 Aug 02:28: Now using data updates from USGSUpdate Sat, 1 Aug 2026, 02:26Shaking reported, possible quake Near San Jose, San José, Costa Rica | 5m ago | - 59 shake reports so farShaking reported, possible #quake Near San Jose, San José, Costa Rica | 5m ago |Numerous people reported to have felt the quake. Attached is an updated map showing the shaking felt (and reported) by this earthquake.Update Sat, 1 Aug 2026, 02:18Seismic-like event, possible earthquake, reported few minutes ago near San Jose, San José, Costa RicaUnconfirmed earthquake or seismic-like event: Near San Jose, San José, Costa Rica, 1 minute agoWe are receiving unverified early reports of ground shaking possibly caused by seismic activity in or near San Jose, San José, Costa Rica on 1 Aug 2026 (GMT) at approximately 02:16 GMT.There are no details yet on the magnitude or depth of this possible quake. If confirmed, we can expect more accurate data to emerge in the next few minutes. The location, magnitude and time mentioned are indicative, based on our best-fit seismic model. They are temporary until our AllQuakes monitoring service receives more exact scientific data from a national or international seismological agency. Check back here shortly and stay safe.If you were or still are in this area during the quake help others with your feedback and report it here.Download the Volcanoes & Earthquakes app and get one of the fastest seismic alerts online: Android | iOSI didn't feel itI felt this quakeEarthquake detailsDate & timeAug 1, 2026 02:16:27 UTC - Local time at epicenterFriday, Jul 31, 2026, at 08:16 pm (America/Costa Rica GMT -6)Statusconfirmed (manually revised)Magnitude4.30Depth10 kmEpicenter latitude / longitude9.7477°N / 83.8046°WDesamparados, Provincia de Cartago, Costa RicaAlso near: Panama 100 km (62 mi) awaySeismic antipode9.7477°S / 96.1954°E Cocos (Keeling) IslandsQuality21 seismic stationsShaking intensityIV Light shaking near epicenterFelt80 reportsPrimary data sourceUSGS (United States Geological Survey)Nearest volcanoIrazu (26 km / 16 mi)Weather at epicenter at time of quakeOvercast Clouds 24°C (75 F), humidity: 90%, wind: 2 m/s (3 kts) from NNEEstimated seismic energy released1.8 x 1011 joules (49.4 megawatt hours, equivalent to 42.5 tons of TNT) | equivalent to ONE quake of magnitude 4.3 | about seismic energy14 minutes ago reported feltAug 1, 2026 02:16 GMT / Jul 31, 2026 08:16 pm (Costa Rica time)Lat / Lng: 9.7477 / -83.8046: 7 km SE of Orosi, Costa RicaSource: USGSOther sources: INETER: 5.0 / 7 kmDetail info | Read user reports | You felt it? - Report it!';storedMarkers.push(['quake-23233916',9.74770,-83.80460,'14 minutes ago: Mag. 4.3, 7 km SE of Orosi, Costa Rica',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 Costa RicaNearby placesThe closest larger town where the quake might have been felt is San Jose, the capital of Costa Rica with 340,000 inhabitants, in 37 km (23 mi) distance northwest of the epicenter. People likely experienced weak shaking there. Many 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(*)RegionCountry8 km (5 mi)NW of epicenterOrosi(pop: 4,350)IV: LightParaiso, Provincia de CartagoCosta Rica12 km (8 mi)NW of epicenterParaiso(pop: 39,700)IV: LightParaiso, Provincia de CartagoCosta Rica13 km (8 mi)NE of epicenterPejibaye(pop: 1,630)IV: LightJimenez, Provincia de CartagoCosta Rica18 km (11 mi)NW of epicenterCartago(pop: 26,600)IV: LightProvincia de CartagoCosta Rica22 km (14 mi)NE of epicenterTurrialba(pop: 29,000)IV: LightProvincia de CartagoCosta Rica26 km (16 mi)W of epicenterSan Marcos(pop: 4,260)IV: LightTarrazu, Provincia de San JoseCosta Rica27 km (17 mi)NW of epicenterTres Rios(pop: 10,400)III: WeakLa Union, Provincia de CartagoCosta Rica27 km (17 mi)NW of epicenterSan Diego(pop: 17,000)III: WeakLa Union, Provincia de CartagoCosta Rica29 km (18 mi)NW of epicenterConcepcion(pop: 14,000)III: WeakLa Union, Provincia de CartagoCosta Rica29 km (18 mi)NW of epicenterPatarra(pop: 24,000)III: WeakDesamparados, Provincia de San JoseCosta Rica31 km (19 mi)NW of epicenterSan Miguel(pop: 28,800)III: WeakDesamparados, Provincia de San JoseCosta Rica31 km (20 mi)NW of epicenterCurridabat(pop: 34,600)III: WeakProvincia de San JoseCosta Rica33 km (20 mi)NW of epicenterSan Rafael Arriba(pop: 15,100)III: WeakDesamparados, Provincia de San JoseCosta Rica33 km (21 mi)NW of epicenterIpis(pop: 26,700)III: WeakGoicoechea, Provincia de San JoseCosta Rica34 km (21 mi)NW of epicenterSabanilla(pop: 13,300)III: WeakMontes de Oca, Provincia de San JoseCosta Rica34 km (21 mi)NW of epicenterSan Pedro(pop: 27,500)III: WeakMontes de Oca, Provincia de San JoseCosta Rica34 km (21 mi)NW of epicenterSan Juan de Dios(pop: 15,500)III: WeakDesamparados, Provincia de San JoseCosta Rica34 km (21 mi)W of epicenterAserri(pop: 25,900)III: WeakAserri, Provincia de San JoseCosta Rica34 km (21 mi)NW of epicenterPurral(pop: 30,000)III: WeakGoicoechea, Provincia de San JoseCosta Rica36 km (22 mi)NW of epicenterGuadalupe(pop: 26,000)III: WeakGoicoechea, Provincia de San JoseCosta Rica36 km (22 mi)NW of epicenterSan Vicente(pop: 34,400)III: WeakMoravia, Provincia de San JoseCosta Rica36 km (22 mi)NW of epicenterSan Vicente(pop: 34,400)III: WeakMoravia, Provincia de San JoseCosta Rica36 km (22 mi)NW of epicenterSan Vicente de Moravia(pop: 34,400)III: WeakMoravia, Provincia de San JoseCosta Rica37 km (23 mi)NW of epicenterCalle Blancos(pop: 20,700)III: WeakGoicoechea, Provincia de San JoseCosta Rica37 km (23 mi)NW of epicenterAlajuelita(pop: 13,800)III: WeakProvincia de San JoseCosta Rica37 km (23 mi)NW of epicenterSan Jose(pop: 335,000)III: WeakSan Jose, Provincia de San JoseCosta Rica37 km (23 mi)NW of epicenterSan Felipe(pop: 25,000)III: WeakAlajuelita, Provincia de San JoseCosta Rica38 km (24 mi)NW of epicenterColima(pop: 15,900)III: WeakTibas, Provincia de San JoseCosta Rica38 km (24 mi)NW of epicenterSan Juan(pop: 26,000)III: WeakTibas, Provincia de San JoseCosta Rica41 km (26 mi)NW of epicenterSan Rafael(pop: 25,400)III: WeakEscazu, Provincia de San JoseCosta Rica41 km (26 mi)NW of epicenterEscazu(pop: 12,100)III: WeakEscazu, Provincia de San JoseCosta Rica42 km (26 mi)NW of epicenterSan Pablo(pop: 21,700)III: WeakProvincia de HerediaCosta Rica44 km (27 mi)S of epicenterSan Isidro(pop: 34,900)III: WeakPerez Zeledon, Provincia de San JoseCosta Rica44 km (28 mi)NW of epicenterSan Josecito(pop: 12,200)III: WeakSan Rafael, Provincia de HerediaCosta Rica45 km (28 mi)NW of epicenterSan Francisco(pop: 55,900)III: WeakHeredia, Provincia de HerediaCosta Rica46 km (29 mi)NW of epicenterMercedes(pop: 26,000)III: WeakHeredia, Provincia de HerediaCosta Rica47 km (29 mi)W of epicenterTejar(pop: 22,400)III: WeakAcosta, Provincia de San JoseCosta Rica51 km (32 mi)NE of epicenterSiquirres(pop: 18,200)III: WeakProvincia de LimonCosta Rica52 km (32 mi)N of epicenterGuapiles(pop: 19,100)III: WeakPococi, Provincia de LimonCosta Rica54 km (34 mi)W of epicenterSan Rafael Abajo(pop: 27,400)III: WeakPuriscal, Provincia de San JoseCosta RicaNotes:(*) Shaking intensity according to the Modified Mercalli Intensity Scale (MMI) and estimated using seismic models.User-reports for this quake (83)The first report about ground shaking reached us after only 57 seconds, before other agencies reported it. So far, we have received 83 reports for this quake from Costa Rica. Out of these, 80 people indicated they felt it. The quake was reported to have been felt in up to approx. 70–200 km (43–124 mi) distance.The majority of reports came from San Jose (13 reports), the capital of Costa Rica with 340,000 inhabitants in 37 km (23 mi) distance northwest of the epicenter, San Isidro (6 reports), a town with 35,000 inhabitants in Provincia de San Jose in 44 km (27 mi) distance south of the epicenter, and Alajuela (4 reports) (54 km or 33 mi to the northwest). See the list of places where most people reported this quake further below.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!TranslateGuacima costa rica (41.3 km N of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s : It seemed like maybe a heavy truck passing very close by for a few seconds. Saw the glass partition on the shower move Cortago Costa Rica (19.2 km NW of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s : I was lying in Bed when it started shaking sideways and heard cracking noises in the walls and windows. The furniture did move as well back and forth 63.9 km NW of epicenter [Map] / Light shaking (MMI IV) (reported through our app)Matazanos, Páramo (38 km SSE of epicenter) [Map] / Light shaking (MMI IV) / vibration and rolling / 10-15 s42.6 km NW of epicenter [Map] / Light shaking (MMI IV) (reported through our app)Concepcion Heredia (42.9 km WNW of epicenter) [Map] / Light shaking (MMI IV) / 15-20 s77.3 km WNW of epicenter [Map] / Weak shaking (MMI III) (reported through our app)20.2 km NNE of epicenter [Map] / Light shaking (MMI IV) (reported through our app)55 km WNW of epicenter [Map] / Weak shaking (MMI III) : Estaba acostado en cama Mercedes Sur de Puriscal (44 km SSE of epicenter) [Map] / Weak shaking (MMI III) / vibration and rolling / 2-5 sSan José downtown (42.8 km WNW of epicenter) [Map] / Light shaking (MMI IV) / vertical swinging (up and down) / 2-5 sEscazu, San Jose, Costa Rica (42.9 km WNW of epicenter) [Map] / Very weak shaking (MMI II) : A few seconds of shaking. San jose (36.9 km NW of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 20-30 s40 km NW of epicenter [Map] / Light shaking (MMI IV) (reported through our app)San Jose de la montaña, Barva (34.1 km NW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 5-10 sSan jose, costa rica (42.8 km WNW of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 20-30 s : Light shaking San josé, Alajuelita, San Felipe (39.1 km WNW of epicenter) [Map] / Weak shaking (MMI III)San Rafael, Heredia (41.3 km WNW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 10-15 s : Light shaking SJO (34.8 km WNW of epicenter) [Map] / Moderate shaking (MMI V) / vertical swinging (up and down) / 1-2 sAlajuela (56.1 km WNW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : Tremble and shake the house at 20:02 Costa Rica time Miravalles, Perez Zeledon, Costa Rica (44 km SSE of epicenter) [Map] / Light shaking (MMI IV) / 10-15 s : Light shaking 38.6 km WNW of epicenter [Map] / Very weak shaking (MMI II) (reported through our app)La plama puriscal / Light shaking (MMI IV) / single lateral shake / 1-2 sNaranjito, Quepos, Costa rica / Weak shaking (MMI III) / 2-5 s : Sudden rolling sensation, short duration. 35.4 km NE of epicenter [Map] / Light shaking (MMI IV) / vibration and rolling / 2-5 s25.6 km NNE of epicenter [Map] / Light shaking (MMI IV) (reported through our iOS app)35.3 km NW of epicenter [Map] / Weak shaking (MMI III) (reported through our app)Cost Rica (47 km NW of epicenter) [Map] / Weak shaking (MMI III) / 1-2 s : Mild shaking Manuel antonio / Weak shaking (MMI III) / rattling, vibrating / 1-2 sSam Ramon Alejuela (43.9 km SSE of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 2-5 s33.3 km WNW of epicenter [Map] / Weak shaking (MMI III) (reported through our app)Show moreShow moreList of cities/places with most reportsPlaceDistance from epicenterAverage reported Shaking IntensityNr. of reportsSan Jose, Provincia de San Jose, Costa Rica(Pop.: 335,007)37 km (23 mi)NW of epicenterIV: Light shaking13San Isidro, Provincia de San Jose, Costa Rica(Pop.: 34,877)44 km (27 mi)S of epicenterIII: Weak shaking6Alajuela, Provincia de Alajuela, Costa Rica(Pop.: 47,494)54 km (33 mi)NW of epicenterIV: Light shaking4San Rafael, Provincia de San Jose, Costa Rica(Pop.: 25,410)41 km (26 mi)NW of epicenterIII: Weak shaking4Curridabat, Provincia de San Jose, Costa Rica(Pop.: 34,586)31 km (20 mi)NW of epicenterIII: Weak shaking3Paraiso, Provincia de Cartago, Costa Rica(Pop.: 39,702)12.2 km (8 mi)NW of epicenterVII: Very strong shaking3Purral, Provincia de San Jose, Costa Rica(Pop.: 30,034)34 km (21 mi)NW of epicenterIV: Light shaking2Concepcion, Provincia de Cartago, Costa Rica(Pop.: 14,000)29 km (18 mi)NW of epicenterIV: Light shaking2Santiago, Provincia de San Jose, Costa Rica(Pop.: 8,292)57 km (35 mi)W of epicenterIV: Light shaking1Atenas, Provincia de Alajuela, Costa Rica(Pop.: 7,014)68 km (42 mi)W of epicenterIII: Weak shaking1Note: Only reports with latitude/longitude coordinate positions given (83 in total) could be used for statistics.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 (*)I: Not felt392–476 km (57–296 mi)257 km (160 mi)II: Very weak shaking1432–204 km (20–127 mi)71 km (44 mi)III: Weak shaking1917.9–77 km (11.1–48 mi)44 km (27 mi)IV: Light shaking3713.8–66 km (8.6–41 mi)38 km (24 mi)V: Moderate shaking37.7–48 km (4.8–30 mi)30 km (19 mi)Notes(*) Reports are filtered to exclude those that are likely highly inaccurate or esaggerated.Only reports with latitude/longitude coordinate positions given (83 in total) could be used for geographic statistics.Get the Android appI 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 GMT2026-08-1EpicenterAgency4.310 km6.2 mi(*)02:16:27.6387 km SE of Orosi, Costa RicaUSGS (United States Geological Survey)5.07 km4.3 mi02:16:2712 Km al noreste de Tres de Junio, Costa Rica3.4 km (2.1 mi) epicenter difference with USGSINETERNotes:(*) 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 2 km2 (1 square miles) as a first-order estimate. The length of the rupture zone thus was probably around 2 km (2 mi).[More info]Recorded aftershocks, latest first (0 quake)Jul 31, 2026 08:16 pm (Costa Rica)14 minutes ago - felt4.310 km0 km - This quake7 km SE of Orosi, Costa RicaMain 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 1,300 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):Mag. 7 or higher: 0.04 quakes per year (or 1 quake every 25 years)Mag. 6 or higher: 0.32 quakes per year (or 1 quake every 3.1 years)Mag. 5 or higher: 1.64 quakes per yearMag. 4 or higher: 33.2 quakes per year (or 2.8 quakes per month)Mag. 3 or higher: 370 quakes per year (or 30.9 quakes per month)Mag. 2 or higher: 1,100 quakes per year (or 2.9 quakes per day)Mag. 1 or higher: 1,300 quakes per year (or 3.5 quakes per day)The area where this quake occurred has a very high level of seismic activity. It has had at least 5 quakes above magnitude 7 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 25 to 30 years.Number of quakes per yearPrevious quakes in the same area of this earthquake