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Moderate mag. 4.1 earthquake - Provincia de Heredia, 31 km north of San Jose, San José, Costa Rica, on Friday, Mar 17, 2023 at 6:22 pm (GMT -6) -

Moderate magnitude 4.1 earthquake at 3 km depth

18 Mar 00:46 UTC: First to report: RSN after 24 minutes.

Earthquake details

Date & time	Mar 18, 2023 00:22:00 UTC -
Local time at epicenter	Friday, Mar 17, 2023 at 6:22 pm (GMT -6)
Status	Confirmed
Magnitude	4.1
Depth	3.0 km
Epicenter latitude / longitude	10.21°N / 84.131°W (Provincia de Heredia, Costa Rica)
Antipode	10.21°S / 95.869°E
Shaking intensity	Light shaking
Felt	1 report
Primary data source	RSN
Nearest volcano	Barva (9 km / 6 mi)
Nearby towns and cities	16 km (10 mi) N of Santo Domingo (Santa Bárbara, Heredia) (pop: 5,750) \| Show on map \| Quakes nearby 23 km (14 mi) N of Mercedes (Heredia) (pop: 26,000) \| Show on map \| Quakes nearby 23 km (14 mi) N of Heredia (pop: 21,900) \| Show on map \| Quakes nearby 23 km (14 mi) NNE of Alajuela (pop: 47,500) \| Show on map \| Quakes nearby 24 km (15 mi) N of San Francisco (Heredia) (pop: 55,900) \| Show on map \| Quakes nearby 29 km (18 mi) NNW of San Vicente de Moravia (San Vicente, San José) (pop: 34,400) \| Show on map \| Quakes nearby 29 km (18 mi) NNW of San Vicente (San José) (pop: 34,400) \| Show on map \| Quakes nearby 31 km (19 mi) N of San Jose (San José) (pop: 335,000) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Overcast Clouds 15.2°C (59 F), humidity: 98%, wind: 1 m/s (2 kts) from SE
Estimated seismic energy released	8.9 x 10¹⁰ joules (24.8 megawatt hours, equivalent to 21.3 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
4.1	3 km	Costa Rica: 5 Km Al Noreste De Varablanca, Heredia.	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: 23 km / 14 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

User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.

Translate

Home (10.2 km SSW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s

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