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Minor mag. 1.6 earthquake - Portugal: S. Jorge on Saturday, Mar 18, 2023 at 1:40 pm (GMT -1) -

Minor magnitude 1.6 earthquake at 0 km depth

18 Mar 14:49 UTC: First to report: IVAR (AZO) after 9 minutes.

Earthquake details

Date & time	Mar 18, 2023 14:40:06 UTC -
Local time at epicenter	Saturday, Mar 18, 2023 at 1:40 pm (GMT -1)
Status	Confirmed
Magnitude	1.6
Depth	0.0 km
Epicenter latitude / longitude	38.691°N / 28.203°W (Portugal)
Antipode	38.691°S / 151.797°E
Shaking intensity	Very weak shaking
Felt	0 reports
Primary data source	IVAR (AZO) (Instituto de Investigação em Vulcanologia e Avaliação de Riscos)
Nearest volcano	São Jorge (9 km / 6 mi)
Nearby towns and cities	1 km (1 mi) NNE of Velas (pop: 1,980) \| Show on map \| Quakes nearby 19 km (12 mi) WNW of Calheta (pop: 3,770) \| Show on map \| Quakes nearby 21 km (13 mi) NNE of San Roque (pop: 3,710) \| Show on map \| Quakes nearby 33 km (21 mi) N of Lajes (pop: 4,710) \| Show on map \| Quakes nearby 41 km (25 mi) ENE of Horta (pop: 6,570) \| Show on map \| Quakes nearby 47 km (29 mi) SSW of Santa Cruz da Graciosa (pop: 1,780) \| Show on map \| Quakes nearby 86 km (53 mi) W of Angra do Heroismo (Angra do Heroísmo Municipality) (pop: 12,000) \| Show on map \| Quakes nearby 99 km (61 mi) W of Praia da Vitoria (Praia da Vitória) (pop: 6,060) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Overcast Clouds 16.1°C (61 F), humidity: 79%, wind: 6 m/s (12 kts) from S
Estimated seismic energy released	1.6 x 10⁷ joules (4.4 kilowatt hours) \| 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
1.6	0 km	Portugal: S. Jorge	IVAR (AZO)

Most recent quakes Top 20 past 24 hrs Quakes in Portugal

Seismograms

Seismic station: (ROSA/PM network) | Distance from quake: 5 km / 3 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

User reports for this quake

At magnitude 1.6, such a quake wouldn't normally be felt by people, but could be recorded instrumentally.

Earlier earthquakes in the same area

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