Contact | RSS | EN | DE | EL | ES | FR | IT | RU

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)
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
[smaller] [bigger]

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.
4.21 km39 Km Al Suroeste De Puerto Quepos, Costa RicaINETER
4.716 kmCosta Rica: 25 Km Al Suroeste De Parrita, Puntarenas.RSN


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
Show more

User reports for this quake (1)

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.
Flag as inappropriate.
Mark as helpful or interesting.
Send your own user report!
San Pedro,San José / not felt : Don't felt (reported through our app)  

Earlier earthquakes in the same area

Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version

Support us - Help us upgrade our services!

We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Improved multilanguage support
  • Tsunami alerts
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Design upgrade
  • Detailed quake stats
  • Additional seismic data sources
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Sources: VolcanoDiscovery / VolcanoAdventures and other sources as noted.
Use of material: Most text and images on our websites are owned by us. Re-use is generally not permitted without authorization. Contact us for licensing rights.
Volcanoes & Earthquakes
VolcanoDiscovery Home
Volcanoes | Earthquakes | Photos | Volcano News | App
Adventure & Study Travel
Tours to Volcanoes and Volcanic Areas: walking tours, photo tours, study tours
Tours & Dates | FAQ | About us
Get our newsletter!
Company info
Contact | Legal info | Terms & conditions
Follow us
Follow us on facebook Follow us on Instagram Follow us on Twitter Visit our Youtube channel
EN | DE | EL | ES | FR | IT | RU
VolcanoDiscovery GmbH, Germany, Reg. nr.: HRB 103744, EU Tax Id: DE 310 395 322 owned and created by
Dr. Tom Pfeiffer, volcanologist, volcano photographer, tour organizer member of
Volcanological Society
Ecotourism Greece
Insured by R+V
VolcanoDiscovery © 2004- All Rights Reserved | Privacy - cookie settings