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Moderate mag. 4.0 earthquake - Provincia de Alajuela, 27 km northeast of Canas, Costa Rica, on Wednesday, Aug 10, 2022 at 6:49 pm (GMT -6) -

Moderate mag. 4.0 earthquake - Provincia de Alajuela, 27 km northeast of Canas, Costa Rica, on Wednesday, Aug 10, 2022 at 6:49 pm (GMT -6) Moderate mag. 4.0 earthquake - Provincia de Alajuela, 27 km northeast of Canas, Costa Rica, on Wednesday, Aug 10, 2022 at 6:49 pm (GMT -6)

Moderate magnitude 4.0 earthquake at 4 km depth

11 Aug 01:02 UTC: First to report: RSN after 13 minutes.

Earthquake details

Date & timeAug 11, 2022 00:49:00 UTC -
Local time at epicenterWednesday, Aug 10, 2022 at 6:49 pm (GMT -6)
Depth4.0 km
Epicenter latitude / longitude10.608°N / 84.93°W (Guatuso, Provincia de Alajuela, Costa Rica)
Antipode10.608°S / 95.07°E
Shaking intensityWeak shaking
Felt2 reports
Primary data sourceRSN
Nearest volcanoTenorio (12 km / 7 mi)
Nearby towns and cities16 km (10 mi) NNE of Tilaran (Tilarán, Guanacaste) (pop: 7,300) | Show on map | Quakes nearby
27 km (17 mi) NE of Canas (Cañas, Guanacaste) (pop: 20,300) | Show on map | Quakes nearby
34 km (21 mi) SSE of Upala (Alajuela) (pop: 4,190) | Show on map | Quakes nearby
44 km (28 mi) SSE of San Jose (Upala, Alajuela) (pop: 31,400) | Show on map | Quakes nearby
63 km (39 mi) WNW of Ciudad Quesada (Barrio San Martín, Alajuela) (pop: 27,300) | Show on map | Quakes nearby
103 km (64 mi) NW of Alajuela (pop: 47,500) | Show on map | Quakes nearby
111 km (69 mi) NW of San Francisco (Heredia) (pop: 55,900) | Show on map | Quakes nearby
119 km (74 mi) NW of San Jose (San José) (pop: 335,000) | Show on map | Quakes nearby
Weather at epicenter at time of quakeOvercast Clouds 21.5°C (71 F), humidity: 92%, wind: 1 m/s (2 kts) from ENE
Estimated seismic energy released6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 tons of TNT) | about seismic energy
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Data for the same earthquake reported by different agencies

Info: The 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.
4.04 kmCosta Rica: 9 Km Al Oeste De Cote, Guatuso.RSN


Seismic station: Las Juntas de Abangares, Costa Rica (JTS/II network) | Distance from quake: 35 km / 22 mi | Show on map | Station Info
Seismic station Las Juntas de Abangares, Costa Rica: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (2)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Leave a comment if you find a particular report interesting or want to add to it.
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Nuevo Arenal de Tilarán / Weak shaking (MMI III) / rattling, vibrating / 2-5 s : Started like a vibration, then got stronger, then settled down | One user found this interesting.  
Sabalito, Costa Rica / Very weak shaking (MMI II) / single vertical bump / 1-2 s : Light jolt followed by very light shaking... (reported through our app)  

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