Moderate mag. 4.0 earthquake - Acosta, 24 km southwest of Сан-Хосе, San José, San Jose, Costa Rica, on Monday, 22 Feb 2021 5:50 pm (GMT -6) -

Moderate mag. 4.0 earthquake - Acosta, 24 km southwest of Сан-Хосе, San José, San Jose, Costa Rica, on Monday, 22 Feb 2021 5:50 pm (GMT -6)

Moderate magnitude 4.0 earthquake at 3 km depth

22 Feb 23:56 UTC: First to report: INETER after 6 minutes.
23 Feb 00:28: Magnitude recalculated from 3.9 to 4.0. Hypocenter depth recalculated from 10.0 to 7.0 km (from 6.2 to 4.3 mi).
23 Feb 00:42: Hypocenter depth recalculated from 7.0 to 3.0 km (from 4.3 to 1.9 mi).
Update Tue, 23 Feb 2021, 02:56
Magnitude 4.0 hit earthquake near capital of Costa Rica.
4.0 quake 22 Feb 5:50 pm (GMT -6)
4.0 quake 22 Feb 5:50 pm (GMT -6)
A magnitude 4.0 earthquake hit near the City of San Jose, Costa Rica’s capital, on Monday afternoon, 22 Feb. 2021, at 5:50 pm local time. The quake occurred at a very shallow depth of 3 km at about 24 km distance from the city.
A second report was later issued by the United States Geological Survey, which listed it as a magnitude 3.9 earthquake. A third agency, the European-Mediterranean Seismological Centre (EMSC), reported the same magnitude as well.
Within minutes from the quake, our monitoring service received reports from users who felt the quake. The reports describe the quake as weak shaking. Those within an immediate 5 km radius from the epicenter further detailed the quake as a “double jolt” consisting of a light initial jolt, and a following stronger one. The earthquake was felt within a radius of about 30 km around the epicenter.
People also felt the quake in San Rafael (pop. 25,400) located 19 km from the epicenter, Aserri (pop. 25,900) 19 km away, San Felipe (pop. 25,000) 20 km away, San Miguel (pop. 28,800) 23 km away, Alajuela (pop. 47,500) 24 km away, and San Francisco de Heredia (pop. 21,900) 27 km away.
No damages were reported as a result of this quake. At least one aftershock of magnitude 2.6 was recorded, but not felt.
If you were or still are in this area during the quake help others with your feedback and file a quick report here.
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Earthquake data:

I felt this quake
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Date & time: 22 Feb 2021 23:50:30 UTC -
Local time at epicenter: Monday, 22 Feb 2021 5:50 pm (GMT -6)
Magnitude: 4
Depth: 3.0 km
Epicenter latitude / longitude: 9.81°N / 84.26°W (Acosta, San Jose, Costa Rica)
Nearest volcano: Barva (40 km / 25 mi)
Nearby towns and cities:
4 km (3 mi) SE of San Rafael Abajo (Puriscal, San José) (pop: 27,400) --> See nearby quakes!
8 km (5 mi) NNW of Tejar (Acosta, San José) (pop: 22,400) --> See nearby quakes!
19 km (12 mi) SW of San Rafael (San José) (pop: 25,400) --> See nearby quakes!
19 km (12 mi) WSW of Aserri (San José) (pop: 25,900) --> See nearby quakes!
20 km (12 mi) WSW of San Felipe (San José) (pop: 25,000) --> See nearby quakes!
23 km (14 mi) WSW of San Miguel (San José) (pop: 28,800) --> See nearby quakes!
24 km (15 mi) SSW of Alajuela (pop: 47,500) --> See nearby quakes!
24 km (15 mi) SW of San Jose (San José) (pop: 335,000) --> See nearby quakes!
27 km (16 mi) SW of San Francisco de Heredia (Heredia) (pop: 21,900) --> See nearby quakes!
136 km (84 mi) W of Puerto Limon (Limón) (pop: 63,100) --> See nearby quakes!
Weather at epicenter at time of quake:
Few Clouds 22.6°C (73 F), humidity: 60%, wind: 9 m/s (17 kts) from E
Primary data source: INETER
Estimated released energy: 6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 tons of TNT) More info
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If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

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.
MagnitudeDepthLocationSource
M 4.03 km19 Km Al Sureste De Poro, Costa RicaINETER
M 4.16 km6 Km Al Suroeste De Tabarcia De Mora., Costa RicaRSN
M 3.910 kmCOSTA RICAEMSC
M 3.910 km5 Km WNW of Tejar, Costa RicaUSGS

User reports for this quake (16)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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19.5 km NE of epicenter [Map] / Moderate shaking (MMI V) : There appeared to be 2 shocks, about 1 or 2 secs. apart. The first was very minor, just a short jolt, and my immediate thought was "Was that a quake?". which was immediately answered by the second shock which lasted about 1/2 sec. Water in a glass jiggled up and down (not sloshing side to side). No other damage. | 3 users found this interesting.
San Rafael de Escazu / Weak shaking (MMI III) / single vertical bump / 1-2 s : This was a double jolt. The first one was light, the second one stronger. There seemed to be just a second or so in between. | One user found this interesting.
26.1 km NE of epicenter [Map] / Weak shaking (MMI III)
24.5 km NW of epicenter [Map] / Light shaking (MMI IV) / 2-5 s
Heredia (26.7 km NE of epicenter) [Map] / Very weak shaking (MMI II) / 5-10 s : Se sintió leve (reported through our app)
26.1 km NE of epicenter [Map] / Weak shaking (MMI III)
20.4 km NNE of epicenter [Map] / Light shaking (MMI IV) (reported through our app)
21.7 km NE of epicenter [Map] / Weak shaking (MMI III) / 5-10 s : A jolt to the building then about 10seconds of light shaking. (reported through our app)
21.6 km NE of epicenter [Map] / Very weak shaking (MMI II)
17.7 km NE of epicenter [Map] / Strong shaking (MMI VI) (reported through our app)
calle morenos sabana sur san jose / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s : I was sitting at my desk and felt a noise and then a shaking of the room
Santa Ana, Costa Rica / Light shaking (MMI IV) / 2-5 s
Pavas, San José / Very weak shaking (MMI II) / 1-2 s
escazu / Moderate shaking (MMI V) / single vertical bump / very short
nunciatura / Light shaking (MMI IV)
San José, Costa Rica, San Miguel / Weak shaking (MMI III) / rattling, vibrating / 1-2 s
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