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Moderate mag. 4.2 earthquake - North Pacific Ocean, Costa Rica, on Wednesday, Oct 20, 2021 at 10:57 pm (GMT -6) -

Moderate mag. 4.2 earthquake - North Pacific Ocean, Costa Rica, on Wednesday, Oct 20, 2021 at 10:57 pm (GMT -6) Moderate mag. 4.2 earthquake - North Pacific Ocean, Costa Rica, on Wednesday, Oct 20, 2021 at 10:57 pm (GMT -6)

Moderate magnitude 4.2 earthquake at 1 km depth

21 Oct 06:00 UTC: First to report: INETER after 1 hour and 2 minutes.

Earthquake details

Date & timeOct 21, 2021 04:57:55 UTC -
Local time at epicenterWednesday, Oct 20, 2021 at 10:57 pm (GMT -6)
StatusConfirmed
Magnitude4.2
Depth1.0 km
Epicenter latitude / longitude9.293°N / 84.487°W (North Pacific Ocean, Costa Rica)
Antipode9.293°S / 95.513°E
Shaking intensityModerate shaking near epicenter
Felt0 reports
Primary data sourceINETER
Nearest volcanoIrazu (103 km / 64 mi)
Nearby towns and cities31 km (19 mi) SW of Parrita (pop: 3,730) | Show on map | Quakes nearby
39 km (24 mi) WSW of Quepos (pop: 7,810) | Show on map | Quakes nearby
58 km (36 mi) SSW of Tejar (Acosta) (pop: 22,400) | Show on map | Quakes nearby
64 km (40 mi) SSW of San Rafael Abajo (Puriscal) (pop: 27,400) | Show on map | Quakes nearby
84 km (52 mi) SSW of San Jose (pop: 335,000) | Show on map | Quakes nearby
85 km (53 mi) SSE of Puntarenas (pop: 35,700) | Show on map | Quakes nearby
86 km (53 mi) SSW of Alajuela (pop: 47,500) | Show on map | Quakes nearby
87 km (54 mi) SSW of San Francisco (pop: 55,900) | Show on map | Quakes nearby
89 km (55 mi) SSW of Heredia (pop: 21,900) | Show on map | Quakes nearby
89 km (55 mi) SW of Cartago (pop: 26,600) | Show on map | Quakes nearby
Estimated seismic energy released1.3 x 1011 joules (35 megawatt hours, equivalent to 30.1 tons of TNT) | about seismic energy
Show interactive Map
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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.
Mag.DepthLocationSource
4.21 km39 Km Al Suroeste De Puerto Quepos, Costa RicaINETER
4.716 kmCosta Rica: 25 Km Al Suroeste De Parrita, Puntarenas.RSN

Seismograms

Seismic station: Heredia, Costa Rica (HDC/G network) | Distance from quake: 89 km / 55 mi | Show on map | Station Info
Seismic station Heredia, 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. Bandpass filter applied: 0.2-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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San Pedro,San José / not felt : Don't felt (reported through our app)  

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