Terremoto moderato mag. 3.9 - Provincia de Alajuela, 41 km a sud ovest da San José, Costa Rica, 2021-08-01 17:38:29 -

Terremoto moderato mag. 3.9 - Provincia de Alajuela, 41 km a sud ovest da San José, Costa Rica, 2021-08-01 17:38:29

Terremoto moderato magnitudine 3.9 at 11 km depth

1 Aug 23:42 UTC: Primo a segnalare: INETER dopo 4 minuti.
1 Aug 23:49: Magnitudine ricalcolata da 3.8 a 3.9. Profondità ricalcolata da 5.0 a 11.0 km (da 3.1 a 6.8 mi). Posizione dell'epicentro corretta di 3.6 km (2.3 mi) al SSW.
Data & ora: 1 Aug 2021 23:38:29 UTC -
Ora locale a epicentro: 2021-08-01 17:38:29
Magnitudine: 3.9
Prof.: 11.0 km
Epicentro latitudine / longitudine: 9.602°N / 84.237°W (Provincia de Alajuela, Costa Rica)
Antipode: 9.602°S / 95.763°E
Vulcano più vicino: Irazu (56 km / 35 mi)
Nearby towns and cities:
13 km NE da Parrita (Puntarenas) (pop: 3,730) --> Vedi sismi vicini
16 km S da Tejar (Acosta, San José) (pop: 22,400) --> Vedi sismi vicini
26 km SSE da San Rafael Abajo (Puriscal, San José) (pop: 27,400) --> Vedi sismi vicini
33 km SSO da Aserri (San José) (pop: 25,900) --> Vedi sismi vicini
36 km SSO da San Miguel (San José) (pop: 28,800) --> Vedi sismi vicini
41 km SSO da San José (pop: 335,000) --> Vedi sismi vicini
41 km SSO da Curridabat (San José) (pop: 34,600) --> Vedi sismi vicini
45 km SSO da San Francisco (Heredia) (pop: 55,900) --> Vedi sismi vicini
46 km S da Alajuela (pop: 47,500) --> Vedi sismi vicini
139 km OSO da Limón (pop: 63,100) --> Vedi sismi vicini
Weather at epicenter at time of quake:
Overcast Clouds 28.4°C (83 F), humidity: 92%, wind: 0 m/s (1 kts) from NW
Fonte dati primaria: INETER
Stima dell'energia sismica liberata: 4.5 x 1010 joules (12.4 MWh, equivalent to 10.7 tons of TNT) More info
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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.
3.911 km21 Km Al Noroeste De Puerto Quepos, Costa RicaINETER
4.122 kmCosta Rica: 16 Km Al Noreste De Parrita, Puntarenas.RSN

User reports for this quake (9)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Alajuela (45.2 km N of epicenter) [Map] / Weak shaking (MMI III) / 1-2 s : Muy suave,cierto balanceo (reported through our app)  
San Rafael, Alajuela (55.9 km NNW of epicenter) [Map] / Weak shaking (MMI III)
San Ramon, Alajuela (61.1 km NNW of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / very short : House made a loud snap sound (reported through our app)  
Atenas, Provincia de Alajuela (46.9 km NNW of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 1-2 s (reported through our app)
Santiago de Puriscal / Weak shaking (MMI III) / 2-5 s
San Mateo, Costa Rica / Light shaking (MMI IV) / 2-5 s : Subtle shaking  
Atenas (45 km NNW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : Light fixture shaking.  
Cartago (46.6 km NE of epicenter) [Map] / not felt (reported through our app)
Mastatal / Light shaking (MMI IV) / 2-5 s
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