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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 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 & time	Oct 21, 2021 04:57:55 UTC -
Local time at epicenter	Wednesday, Oct 20, 2021 at 10:57 pm (GMT -6)
Status	Confirmed
Magnitude	4.2
Depth	1.0 km
Epicenter latitude / longitude	9.293°N / 84.487°W (North Pacific Ocean, Costa Rica)
Antipode	9.293°S / 95.513°E
Shaking intensity	Moderate shaking near epicenter
Felt	0 reports
Primary data source	INETER
Nearest volcano	Irazu (103 km / 64 mi)
Nearby towns and cities	31 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
Weather at epicenter at time of quake
Estimated seismic energy released	1.3 x 10¹¹ joules (35 megawatt hours, equivalent to 30.1 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.

Mag.	Depth	Location	Source
4.2	1 km	39 Km Al Suroeste De Puerto Quepos, Costa Rica	INETER
4.7	16 km	Costa Rica: 25 Km Al Suroeste De Parrita, Puntarenas.	RSN

Most recent quakes Top 20 past 24 hrs Quakes in Costa Rica

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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Seismic station Heredia, Costa Rica: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Heredia, Costa Rica: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake, showing horizontal E-W and N-S ground movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Managua, Nicaragua (MGAN/NU network) | Distance from quake: 371 km / 231 mi | Show on map | Station Info

Seismic station Managua, Nicaragua: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Managua, Nicaragua: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Managua, Nicaragua: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Isla Barro Colorado, Panama (BCIP/CU network) | Distance from quake: 511 km / 317 mi | Show on map | Station Info

Seismic station Isla Barro Colorado, Panama: 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: 0.2-5.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station Isla Barro Colorado, Panama: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Isla Barro Colorado, Panama: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Montecristo, El Salvador (SNET/SV network) | Distance from quake: 711 km / 442 mi | Show on map | Station Info

Seismic station Montecristo, El Salvador: 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: 0.2-5.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismogram (vertical component) around time of quake. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: COMITAN (CCIG/MX network) | Distance from quake: 1136 km / 706 mi | Show on map | Station Info

Seismic station COMITAN: 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: 0.2-5.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station COMITAN: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station COMITAN: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

User reports for this quake (1)

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San Pedro,San José / not felt : Don't felt (reported through our app)

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