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

Weak mag. 2.3 earthquake - North Atlantic Ocean, 19 km northwest of Angra do Heroismo, Azores, Portugal, on Saturday, Mar 18, 2023 at 8:17 am (GMT -1) -

Weak mag. 2.3 earthquake - North Atlantic Ocean, 19 km northwest of Angra do Heroismo, Azores, Portugal, on Saturday, Mar 18, 2023 at 8:17 am (GMT -1) Weak mag. 2.3 earthquake - North Atlantic Ocean, 19 km northwest of Angra do Heroismo, Azores, Portugal, on Saturday, Mar 18, 2023 at 8:17 am (GMT -1)

Weak magnitude 2.3 earthquake at 2 km depth

18 Mar 09:27 UTC: First to report: IPMA after 10 minutes.

Earthquake details

Date & timeMar 18, 2023 09:17:03 UTC -
Local time at epicenterSaturday, Mar 18, 2023 at 8:17 am (GMT -1)
Depth2.0 km
Epicenter latitude / longitude38.743°N / 27.406°W (North Atlantic Ocean, Portugal)
Antipode38.743°S / 152.594°E
Shaking intensityWeak shaking near epicenter
Felt0 reports
Primary data sourceIPMA (Portuguese Institute for Sea and Atmosphere (Instituto Português do Mar e da Atmosfera, IPMA))
Nearest volcanoTerceira (7 km / 4 mi)
Nearby towns and cities8 km (5 mi) NW of Santa Barbara (pop: 1,270) | Show on map | Quakes nearby
14 km (9 mi) WSW of Biscoitos (pop: 1,430) | Show on map | Quakes nearby
19 km (12 mi) WNW of Angra do Heroismo (Angra do Heroísmo Municipality) (pop: 12,000) | Show on map | Quakes nearby
29 km (18 mi) W of Praia da Vitoria (Praia da Vitória) (pop: 6,060) | Show on map | Quakes nearby
55 km (34 mi) ENE of Calheta (pop: 3,770) | Show on map | Quakes nearby
64 km (40 mi) SE of Santa Cruz da Graciosa (pop: 1,780) | Show on map | Quakes nearby
70 km (44 mi) E of Velas (pop: 1,980) | Show on map | Quakes nearby
100 km (62 mi) ENE of Madalena (pop: 6,140) | Show on map | Quakes nearby
56 km (35 mi) ENE of São Jorge Island (pop: 9,500) | Show on map | Quakes nearby
63 km (39 mi) ESE of Graciosa Island (pop: 4,780) | Show on map | Quakes nearby
87 km (54 mi) ENE of Pico Island (pop: 14,800) | Show on map | Quakes nearby
Weather at epicenter at time of quakeOvercast Clouds 16.7°C (62 F), humidity: 94%, wind: 8 m/s (16 kts) from S
Estimated seismic energy released1.8 x 108 joules (49.4 kilowatt hours) | 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.
2.32 kmPortugal: Serreta (Terceira)IPMA


Seismic station: (ROSA/PM network) | Distance from quake: 73 km / 45 mi | Show on map | Station Info
Seismic station : 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: 0.5-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool
Show more

User reports for this quake

At magnitude 2.3, such a quake wouldn't normally be felt by people except under very favorable conditions.
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.

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